[ { "part": "M13.11 ATA 21", "ch": "The pressurization terms include:", "ansGr": [ { "ans": [ "Cabin altitude, cabin differential pressure, and cabin rate of climb.", "true" ] }, { "ans": [ "Cabin altitude, ambient pressure, and cabin differential pressure.", "false" ] }, { "ans": [ "Cabin diffrential pressure, ambient pressure, and cabin rate of climb.", "false" ] } ] }, { "ch": "What is the maximum cabin altitude should be maintained for passenger comfort and safety?", "ansGr": [ { "ans": [ "8000 feet.", "true" ] }, { "ans": [ "14000 feet.", "false" ] }, { "ans": [ "6000 feet.", "false" ] } ] }, { "ch": "What is the type of valve whose position determines the pressure level in cabin?", "ansGr": [ { "ans": [ "Outflow valve.", "true" ] }, { "ans": [ "Overflow valve.", "false" ] }, { "ans": [ "Overpressure valve.", "false" ] } ] }, { "ch": "What is the function of the cabin air pressure safety valve?", "ansGr": [ { "ans": [ "Prevents the cabin from the over pressurization and the negative pressure.", "true" ] }, { "ans": [ "Changes the cabin air pressure bases on the requirement of pilots.", "false" ] }, { "ans": [ "Stabilizes the cabin air pressure bases on the requirement of pilots.", "false" ] } ] }, { "ch": "The main pressurization indications include:", "ansGr": [ { "ans": [ "The cabin altimeter, the cabin rate of climb or vertical speed indicator, and the cabin differential pressure indicator.", "true" ] }, { "ans": [ "The cabin altimeter, the cabin rate of climb or vertical speed indicator, and the ambient pressure indicator.", "false" ] }, { "ans": [ "The cabin and ambient altimeter, the cabin rate of climb or vertical speed indicator, and the cabin differential pressure indicator.", "false" ] } ] }, { "ch": "Which is the normal mode of operation for most pressurization control systems?", "ansGr": [ { "ans": [ "The automatic mode.", "true" ] }, { "ans": [ "The standby mode.", "false" ] }, { "ans": [ "The manual mode.", "false" ] } ] }, { "ch": "What is the position of the outflow valve at take-off?", "ansGr": [ { "ans": [ "Fully close.", "true" ] }, { "ans": [ "Fully open.", "false" ] }, { "ans": [ "Partially open.", "false" ] } ] }, { "ch": "The aircraft cabin pressurization can be controlled via:", "ansGr": [ { "ans": [ "The isobaric mode or the constant differential mode.", "true" ] }, { "ans": [ "The isobaric mode or the relative pressure mode.", "false" ] }, { "ans": [ "The absolute pressure mode or the constant differential mode.", "false" ] } ] }, { "ch": "The modes of operation for most cabin pressurization control systems are:", "ansGr": [ { "ans": [ "The automatic, standby, and manual modes.", "true" ] }, { "ans": [ "The automatic, isobaric, and manual modes.", "false" ] }, { "ans": [ "The automatic, isobaric, and relative pressure modes.", "false" ] } ] }, { "ch": "How does a barometer operate?", "ansGr": [ { "ans": [ "The weight of the atmosphere pushes down on the mercury in the reservoir of a barometer, which causes mercury to rise in the column.", "true" ] }, { "ans": [ "The weight of the atmosphere pushes down on the water in the reservoir of a barometer, which causes water to rise in the column.", "false" ] }, { "ans": [ "Barometer which is an electronic device contains some pressure sensors inside. It senses and displays the pressure correctly.", "false" ] } ] }, { "ch": "What is the standard atmospheric pressure at sea level?", "ansGr": [ { "ans": [ "1 atm, 14.7 psi, 29.92 in Hg, 1013.2 hPa, or 1013.2 mb.", "true" ] }, { "ans": [ "1 atm, 14.7 in Hg, 29.92 psi, 1013.2 hPa, or 1013.2 mb.", "false" ] }, { "ans": [ "1 atm, 14.7 in Hg, 29.92 hPa, 1013.2 psi, or 1013.2 mb.", "false" ] } ] }, { "ch": "What is the order from lowest to highest of the layers of the atmosphere?", "ansGr": [ { "ans": [ "Troposphere, Stratosphere, Mesosphere, and Thermosphere.", "true" ] }, { "ans": [ "Mesosphere, Troposphere, Stratosphere, and Thermosphere.", "false" ] }, { "ans": [ "Mesosphere, Troposphere, Thermosphere, and Stratosphere.", "false" ] } ] }, { "ch": "What is the cabin altitude?", "ansGr": [ { "ans": [ "The cabin altitude is the air pressure inside the cabin, the altitude on a standard day that has the same pressure as that in the cabin.", "true" ] }, { "ans": [ "The cabin altitude is the difference between the air pressure inside the cabin and the air pressure outside the cabin.", "false" ] }, { "ans": [ "The cabin altitude is the rate of change of air pressure inside the cabin, expressed in feet per minute (fpm) of cabin altitude change.", "false" ] } ] }, { "ch": "What is the cabin differential pressure?", "ansGr": [ { "ans": [ "The cabin differential pressure is the difference between the air pressure inside the cabin and the air pressure outside the cabin.", "true" ] }, { "ans": [ "The cabin differential pressure is the air pressure inside the cabin, the altitude on a standard day that has the same pressure as that in the cabin.", "false" ] }, { "ans": [ "The cabin differential pressure is the rate of change of air pressure inside the cabin, expressed in feet per minute (fpm) of cabin altitude change.", "false" ] } ] }, { "ch": "What is the cabin rate of climb?", "ansGr": [ { "ans": [ "The cabin rate of climb is the rate of change of air pressure inside the cabin, expressed in feet per minute (fpm) of cabin altitude change.", "true" ] }, { "ans": [ "The cabin rate of climb is the difference between the air pressure inside the cabin and the air pressure outside the cabin.", "false" ] }, { "ans": [ "The cabin rate of climb is the air pressure inside the cabin, the altitude on a standard day that has the same pressure as that in the cabin.", "false" ] } ] }, { "ch": "What is the range of cabin differential pressure for aircraft?", "ansGr": [ { "ans": [ "The differential pressure can range from 3.5 psi for a single engine reciprocating aircraft, to approximately 9 psi on high performance jet aircraft.", "true" ] }, { "ans": [ "The differential pressure can range from 3.5 psi for a high performance jet aircraft, to approximately 9 psi on single engine reciprocating aircraft .", "false" ] }, { "ans": [ "The differential pressure can range from 3.5 bar for a single engine reciprocating aircraft, to approximately 9 on high performance jet aircraft.", "false" ] } ] }, { "ch": "How many psi of the ambient pressure if the cabin altitude is 8000 feet (10.92 psi) and the cabin differential pressure is 8.20 psid?", "ansGr": [ { "ans": [ "The ambient pressure is 2.72 psi (40000 feet).", "true" ] }, { "ans": [ "The ambient pressure is 19.12 psi (40000 feet).", "false" ] }, { "ans": [ "The ambient pressure is 19.12 psi (24000 feet).", "false" ] } ] }, { "ch": "Which is the type of cabin pressurization mode if the cabin altitude is remained at 8000 feet, even as the altitude of the aircraft fluctuates?", "ansGr": [ { "ans": [ "The isobaric mode.", "true" ] }, { "ans": [ "The constant differential mode.", "false" ] }, { "ans": [ "The normal mode.", "false" ] } ] }, { "ch": "Which is the type of cabin pressurization mode if the cabin pressure is maintained a constant pressure difference between the air pressure inside the cabin and the ambient air pressure, regardless of aircraft altitude changes?", "ansGr": [ { "ans": [ "The constant differential mode.", "true" ] }, { "ans": [ "The isobaric mode.", "false" ] }, { "ans": [ "The normal mode.", "false" ] } ] }, { "ch": "The constant differential mode pressure differential is:", "ansGr": [ { "ans": [ "Lower than the maximum differential pressure for which the airframe is designed.", "true" ] }, { "ans": [ "Higher than the maximum differential pressure for which the airframe is designed.", "false" ] }, { "ans": [ "As much as the maximum differential pressure for which the airframe is designed.", "false" ] } ] }, { "ch": "What happens to the control of cabin pressure if the aircraft climbs beyond a certain altitude, maintaining the selected cabin altitude may result in a differential pressure above that for which the airframe was designed; and the isobaric mode is selected?", "ansGr": [ { "ans": [ "The mode of pressurization automatically switches from the isobaric to constant differential mode.", "true" ] }, { "ans": [ "The mode of pressurization remains at the selected level, even as the altitude of the aircraft fluctuates.", "false" ] }, { "ans": [ "A special pressurization mode will be activated for this case.", "false" ] } ] }, { "ch": "How is the cabin rate of climb or descent controlled?", "ansGr": [ { "ans": [ "Automatically or manually.", "true" ] }, { "ans": [ "Automatically or semi-automatically.", "false" ] }, { "ans": [ "Manually or semi-manually.", "false" ] } ] }, { "ch": "Which is the typical range of the cabin rate of climb and descent?", "ansGr": [ { "ans": [ "From 300 to 500 feet per minute.", "true" ] }, { "ans": [ "From 300 to 500 feet per hour.", "false" ] }, { "ans": [ "From 3 to 5 psi per hour.", "false" ] } ] }, { "ch": "Which type of means is utilized for controlling cabin pressure in older aircraft?", "ansGr": [ { "ans": [ "Pneumatic means.", "true" ] }, { "ans": [ "Electric means.", "false" ] }, { "ans": [ "Electronic means.", "false" ] } ] }, { "ch": "What happens if the pressure controller is adjusted and set?", "ansGr": [ { "ans": [ "There are the control input parameters will be sent to the cabin pressure regulator.", "true" ] }, { "ans": [ "There are the control input parameters will be sent to the temperature control regulator.", "false" ] }, { "ans": [ "There are the control input parameters will be sent to the temperature controller.", "false" ] } ] }, { "ch": "Which components are directly controlled by the cabin pressure regulator?", "ansGr": [ { "ans": [ "Outflow valve.", "true" ] }, { "ans": [ "Pressure trim valve.", "false" ] }, { "ans": [ "Overflow valve.", "false" ] } ] }, { "ch": "Which type of means is utilized for controlling cabin pressure in modern aircraft?", "ansGr": [ { "ans": [ "Pneumatic, electric, and electronic means.", "true" ] }, { "ans": [ "Pneumatic and electric means.", "false" ] }, { "ans": [ "Pneumatic and electronic means.", "false" ] } ] }, { "ch": "What are on the cabin pressure selector of the pressurization panel in the cockpit?", "ansGr": [ { "ans": [ "Cabin altitude, cabin rate of change, and barometric setting.", "true" ] }, { "ans": [ "Cabin altitude, cabin rate of change, and cabin differential pressure.", "false" ] }, { "ans": [ "Cabin differential pressure, cabin rate of change, and barometric setting.", "false" ] } ] }, { "ch": "What happens to the electric signals from the selector that are sent to the cabin pressure controller?", "ansGr": [ { "ans": [ "Those signals will be converted from electric to digital and are used by the controller.", "true" ] }, { "ans": [ "Those signals will be converted from electric to analog and are used by the controller.", "false" ] }, { "ans": [ "Those signals will be converted from electric to pneumatic and are used by the controller.", "false" ] } ] }, { "ch": "What are the important inputs that the pressure controller has to receive for controlling the cabin pressurization?", "ansGr": [ { "ans": [ "The cabin pressure and the ambient pressure.", "true" ] }, { "ans": [ "The cabin temperature and the ambient pressure.", "false" ] }, { "ans": [ "The cabin pressure and the ambient temperature.", "false" ] } ] }, { "ch": "Which is the statement correct about the cabin pressurization modes?", "ansGr": [ { "ans": [ "For cabin pressurization, the manual mode can override the automatic mode.", "true" ] }, { "ans": [ "For cabin pressurization, the manual mode cannot override the automatic mode.", "false" ] }, { "ans": [ "For cabin pressurization, the automatic mode can override the manual mode.", "false" ] } ] }, { "ch": "How is the manual mode of the cabin pressurization operated?", "ansGr": [ { "ans": [ "The mode selector is witched to MAN and a separate switch is used to position the outflow valve open or closed to control cabin pressure.", "true" ] }, { "ans": [ "On the cabin pressurization panel, there is a separate switch is used to position the outflow valve open or closed to control cabin pressure", "false" ] }, { "ans": [ "The mode selector is witched to UP or DOWN and a separate switch is used to position the outflow valve open or closed to control cabin pressure.", "false" ] } ] }, { "ch": "How is the cabin pressurization controlled?", "ansGr": [ { "ans": [ "Controlling cabin pressurization is accomplished through regulating the amount of air that flows out of the cabin.", "true" ] }, { "ans": [ "Controlling cabin pressurization is accomplished through regulating the amount of air that flows into the cabin.", "false" ] }, { "ans": [ "Controlling cabin pressurization is accomplished through regulating the amount of air that flows in and out of the cabin.", "false" ] } ] }, { "ch": "Which positions can the cabin outlfow valve operate?", "ansGr": [ { "ans": [ "A cabin outflow valve opens, closes, or modulates to establish the amount of air pressure maintained in the cabin.", "true" ] }, { "ans": [ "A cabin outflow valve fully opens or modulates to establish the amount of air pressure maintained in the cabin.", "false" ] }, { "ans": [ "A cabin outflow valve fully closes or modulates to establish the amount of air pressure maintained in the cabin.", "false" ] } ] }, { "ch": "What are the types of the outflow valve for the cabin pressurization?", "ansGr": [ { "ans": [ "Pneumatically operated, electrically operated outflow valves, and the combination of the above.", "true" ] }, { "ans": [ "Pneumatically operated, electronically operated outflow valves, and the combination of the above.", "false" ] }, { "ans": [ "Electrically operated, electronically operated outflow valves, and the combination of the above.", "false" ] } ] }, { "ch": "Which are components utilized to deflect the outflow valves?", "ansGr": [ { "ans": [ "On transports aircraft, often two AC motors are used with a redundant DC motor for standby or manual operations.", "true" ] }, { "ans": [ "On transports aircraft, often two DC motors are used with a redundant AC motor for standby or manual operations.", "false" ] }, { "ans": [ "On transports aircraft, often two DC motors are used with a redundant pneumatic motor for standby or manual operations.", "false" ] } ] }, { "ch": "Which is the motor in the the outflow valve is controlled by the pressure controller?", "ansGr": [ { "ans": [ "The AC motor.", "true" ] }, { "ans": [ "The DC motor.", "false" ] }, { "ans": [ "The pneumatic motor.", "false" ] } ] }, { "ch": "Which component will prevent the over pressurization to ensure the structural integrity of the aircraft if the control of the pressurization system is lost?", "ansGr": [ { "ans": [ "The cabin air pressure safety valve.", "true" ] }, { "ans": [ "The outflow valve and the pressure controller.", "false" ] }, { "ans": [ "The pneumatic cabin pressure regulator.", "false" ] } ] }, { "ch": "Which the range of pressure is the safety valves are set to open on most aircraft?", "ansGr": [ { "ans": [ "Between 8 and 10 psid.", "true" ] }, { "ans": [ "Between 8 and 10 bar.", "false" ] }, { "ans": [ "It depends on the current altitude of the aircraft.", "false" ] } ] }, { "ch": "How many cabin pressurization safety valves are equipped on aircraft?", "ansGr": [ { "ans": [ "It depends on the size of the aircraft.", "true" ] }, { "ans": [ "One.", "false" ] }, { "ans": [ "Two.", "false" ] } ] }, { "ch": "What is the function of the cabin altitude limiters on aircraft?", "ansGr": [ { "ans": [ "These components close the outflow valves when the pressure in the cabin drops well below the normal cabin altitude range, preventing a further increase in cabin altitude.", "true" ] }, { "ans": [ "These components close the safety valves when the pressure in the cabin drops well below the normal cabin altitude range, preventing a further increase in cabin altitude.", "false" ] }, { "ans": [ "These components close the safety valves when the altitude in the cabin drops well below the normal cabin pressure range, preventing a further increase in cabin pressure.", "false" ] } ] }, { "ch": "What is the function of the negative pressure relief valve on aircraft?", "ansGr": [ { "ans": [ "It ensures that air pressure outside the aircraft is not more than the cabin air pressure.", "true" ] }, { "ans": [ "It ensures that air pressure outside the aircraft is not less than the cabin air pressure.", "false" ] }, { "ans": [ "It ensures that air pressure outside the aircraft is not as much as the cabin air pressure.", "false" ] } ] }, { "ch": "What happens if there is too much negative pressure in the aircraft cabin?", "ansGr": [ { "ans": [ "It causes more difficulty to open the cabin door and it could cause structural damage since the pressure vessel is designed for cabin pressure to be greater than ambient.", "true" ] }, { "ans": [ "It causes more difficulty to close the cabin door and it could cause structural damage since the pressure vessel is designed for cabin pressure to be greater than ambient.", "false" ] }, { "ans": [ "It causes more difficulty to close the cabin door and it could cause structural damage since the pressure vessel is designed for cabin pressure to be smaller than ambient.", "false" ] } ] }, { "ch": "What are the pressurization dump valves on aircraft?", "ansGr": [ { "ans": [ "These components are utilized to quickly remove air and air pressure from the cabin, usually in an abnormal, maintenance, or emergency situation.", "true" ] }, { "ans": [ "These components are utilized to quickly add air and air pressure into the cabin, usually in an abnormal, maintenance, or emergency situation.", "false" ] }, { "ans": [ "These components are utilized to quickly add air and air pressure into the cabin and cockpit, usually when aircraft drops its altitude suddently.", "false" ] } ] }, { "ch": "What happens if the air conditioning packs fail or emergency pressurization is selected from the cockpit during flight?", "ansGr": [ { "ans": [ "A valve opens and directs a mixture of bleed air and ram air into the cabin. This combines with fully closed outflow valves to preserve some pressurization in the aircraft.", "true" ] }, { "ans": [ "A valve opens and directs a flow of bleed air into the cabin immediately. This combines with fully closed outflow valves to preserve some pressurization in the aircraft.", "false" ] }, { "ans": [ "A valve opens and directs a flow of ram air into the cabin immediately. This combines with fully closed outflow valves to preserve some pressurization in the aircraft.", "false" ] } ] }, { "ch": "Which means are used to display the pressurization indication on modern aircraft?", "ansGr": [ { "ans": [ "The LCD displays", "true" ] }, { "ans": [ "The pressure gauges.", "false" ] }, { "ans": [ "The CRT displays.", "false" ] } ] }, { "ch": "What are the names of digital aircraft monitoring systems are used to display the pressurization indication on modern aircraft?", "ansGr": [ { "ans": [ "Engine Indicating and Crew Alerting System (EICAS) or Electronic Centralized Aircraft Monitor (ECAM)", "true" ] }, { "ans": [ "Engine Indicating and Crew Alerting System (EICAS) or Electronic Computerized Aircraft Monitor (ECAM)", "false" ] }, { "ans": [ "Engine Indicating and Crew Air System (EICAS) or Electronic Centralized Aircraft Monitor (ECAM)", "false" ] } ] }, { "ch": "Which page of the monitoring system should be chosen to display the air conditioning indication?", "ansGr": [ { "ans": [ "The environmental control system (ECS) page.", "true" ] }, { "ans": [ "The environmental supervisor controller (ESC) page.", "false" ] }, { "ans": [ "The entire computerized system (ECS) page.", "false" ] } ] }, { "ch": "On the CABIN PRESS panel, the PRESS CONT pushbutton is pushed and the MAN legend comes on. It means:", "ansGr": [ { "ans": [ "The manual mode is selected.", "true" ] }, { "ans": [ "The manual mode is not selected.", "false" ] }, { "ans": [ "It is mandatory to push the MAN legend.", "false" ] } ] }, { "ch": "On the CABIN PRESS panel, the PRESS CONT pushbutton is pushed and the FAULT legend comes on. It means:", "ansGr": [ { "ans": [ "Both pressure controllers failed.", "true" ] }, { "ans": [ "One pressure controller failed.", "false" ] }, { "ans": [ "The fault is not related to the pressure controller.", "false" ] } ] }, { "ch": "Which components on other systems are utilized for the cabin pressurization system?", "ansGr": [ { "ans": [ "A weight-on-wheels (WOW) switch attached to the landing gear and a throttle position switch.", "true" ] }, { "ans": [ "A weight-on-wheels (WOW) switch attached to the landing gear and a position sensor of flaps.", "false" ] }, { "ans": [ "A weight-on-wheels (WOW) switch attached to the landing gear and a control column in cockpit.", "false" ] } ] }, { "ch": "What does the weight-on-wheels (WOW) switch do for the cabin pressurization system during ground operations and prior to takeoff?", "ansGr": [ { "ans": [ "The WOW switch typically controls the position of the pressurization safety valve, which is held in the open position until the aircraft takes off.", "true" ] }, { "ans": [ "The WOW switch typically controls the position of the pressurization safety valve, which is held in the close position until the aircraft takes off.", "false" ] }, { "ans": [ "The WOW switch belongs to the landing gear system and provides the signal to the computers which control the landing gear retraction after take off.", "false" ] } ] }, { "ch": "Which components in the cabin pressurization system may receive the signal of the weight-on- wheels (WOW) switch?", "ansGr": [ { "ans": [ "The pressurization controller, the safety valve or a pneumatic source valve that causes the safety valve to be held open.", "true" ] }, { "ans": [ "The outflow valve, the safety valve or a pneumatic source valve that causes the safety valve to be held open.", "false" ] }, { "ans": [ "The overflow valve, the safety valve or a pneumatic source valve that causes the safety valve to be held open.", "false" ] } ] }, { "ch": "What is the function of the throttle position switches in the cabin pressurization system?", "ansGr": [ { "ans": [ "Throttle position switches can be used to cause a smooth transition from an unpressurized cabin to a pressurized cabin.", "true" ] }, { "ans": [ "Throttle position switches can be used to cause a smooth transition from a pressurized cabin to an unpressurized cabin.", "false" ] }, { "ans": [ "Throttle position switches can be used to prevent the cabin and cockpit from the over pressure and negative pressure.", "false" ] } ] }, { "ch": "Which component controls the sequence of operation of the pressurization components until the aircraft lands?", "ansGr": [ { "ans": [ "The pressurization controller.", "true" ] }, { "ans": [ "The weight-on-wheels (WOW) switch.", "false" ] }, { "ans": [ "The throttle position switch.", "false" ] } ] }, { "ch": "What are the positions of the weight-on-wheels (WOW) switch?", "ansGr": [ { "ans": [ "WOW opens at takeoff and closes at landing.", "true" ] }, { "ans": [ "WOW closes at takeoff and opens at landing.", "false" ] }, { "ans": [ "WOW does not change at takeoff and landing.", "false" ] } ] }, { "ch": "How does the technician control the position of all valves from the cockpit panel for maintenance?", "ansGr": [ { "ans": [ "The technician has to switch the selector to the manual pressurization mode before controlling the valves.", "true" ] }, { "ans": [ "The technician has to switch the selector to the automatic pressurization mode before controlling the valves.", "false" ] }, { "ans": [ "The technician does not have to switch the selector to any mode before controlling the valves.", "false" ] } ] }, { "ch": "Which is the motor in the the outflow valve is used for the manual operation?", "ansGr": [ { "ans": [ "The DC motor.", "true" ] }, { "ans": [ "The AC motor.", "false" ] }, { "ans": [ "The pneumatic motor.", "false" ] } ] }, { "ch": "What is the relationship between the temperature and altitude in the troposhere layer?", "ansGr": [ { "ans": [ "The temperature decreases as the altitude increases.", "true" ] }, { "ans": [ "The temperature decreases as the altitude decreases.", "false" ] }, { "ans": [ "It depends on the area where is in the tropical, temperate, or polar zone.", "false" ] } ] }, { "ch": "What is the rate of change the temperature and the altitude in the troposhere layer?", "ansGr": [ { "ans": [ "It is about -2°C or -3.5°F for every 1000 feet of increase in altitude.", "true" ] }, { "ans": [ "It is about +2°C or +3.5°F for every 1000 feet of increase in altitude.", "false" ] }, { "ans": [ "It is about from +2°C to +3.5°C for every 1000 feet of increase in altitude.", "false" ] } ] }, { "ch": "Where is the ozone layer in the atmosphere?", "ansGr": [ { "ans": [ "The ozone layer is mainly found in the stratosphere.", "true" ] }, { "ans": [ "The ozone layer is mainly found in the troposphere.", "false" ] }, { "ans": [ "The ozone layer is mainly found in the mesosphere.", "false" ] } ] }, { "ch": "Which the layer of atmosphere does most civilian aviation take place in?", "ansGr": [ { "ans": [ "The troposphere.", "true" ] }, { "ans": [ "The stratosphere.", "false" ] }, { "ans": [ "The mesosphere.", "false" ] } ] }, { "ch": "Which section in engine the bleed air is extracted from?", "ansGr": [ { "ans": [ "Compressor section.", "true" ] }, { "ans": [ "Turbine section.", "false" ] }, { "ans": [ "Exhaust section.", "false" ] } ] }, { "ch": "What are the main air sources can supply for the aircraft pressurization and air conditioning?", "ansGr": [ { "ans": [ "Engines, APU, and ground cart.", "true" ] }, { "ans": [ "Ground cart and compressed air reservoir.", "false" ] }, { "ans": [ "Engines and compressed air reservoir.", "false" ] } ] }, { "ch": "How many main air sources can supply for the aircraft pressurization and air conditioning?", "ansGr": [ { "ans": [ "Three.", "true" ] }, { "ans": [ "Two.", "false" ] }, { "ans": [ "Four.", "false" ] } ] }, { "ch": "Which common component is used to supply air during passenger boarding?", "ansGr": [ { "ans": [ "APU.", "true" ] }, { "ans": [ "Engine.", "false" ] }, { "ans": [ "Ground cart.", "false" ] } ] }, { "ch": "Which air source is used to cool the cabin if the air conditioning system is inoperative?", "ansGr": [ { "ans": [ "Ground-based air conditioner.", "true" ] }, { "ans": [ "External air compressor unit.", "false" ] }, { "ans": [ "Backup compressed air supplier.", "false" ] } ] }, { "ch": "Which the statement about the air recirculation in a large cabin turfan engine aircraft is correct?", "ansGr": [ { "ans": [ "Reuse up to 50%.", "true" ] }, { "ans": [ "Reuse up to 60%", "false" ] }, { "ans": [ "Reuse up to 40%.", "false" ] } ] }, { "ch": "The air source of small turbine aircraft comes from:", "ansGr": [ { "ans": [ "Jet pumpflow multiplier.", "true" ] }, { "ans": [ "Low pressure compressor.", "false" ] }, { "ans": [ "Low pressure turbine.", "false" ] } ] }, { "ch": "Which component is use to supply air in turboprop aircraft?", "ansGr": [ { "ans": [ "Turbo-compressor", "true" ] }, { "ans": [ "Turbo-turbine.", "false" ] }, { "ans": [ "Turbo-fan.", "false" ] } ] }, { "ch": "The pressurized air that is created from turboprop engine is stored in:", "ansGr": [ { "ans": [ "The pressure vessel.", "true" ] }, { "ans": [ "The pneumatic cycinder.", "false" ] }, { "ans": [ "The air container.", "false" ] } ] }, { "ch": "The components in the air cycle air conditioning system are:", "ansGr": [ { "ans": [ "Pack valve, heat exchangers, air cycle machine, water separator, bypass valve.", "true" ] }, { "ans": [ "Receiver dryer, expansion valve, evaporator, compressor, condenser.", "false" ] }, { "ans": [ "Pack valve, heat exchangers, air cycle machine, expansion valve, compressor.", "false" ] } ] }, { "ch": "What is the function of the pack valve in the air cycle air conditioning system?", "ansGr": [ { "ans": [ "The pack valve regulates bleed air from the pneumatic manifold into the air cycle air conditioning system", "true" ] }, { "ans": [ "The pack valve releases bleed air to prevent the overpressure in the air cycle air conditioning system.", "false" ] }, { "ans": [ "The pack valve changes the temperature of bleed air and supply it to the air cycle air conditioning system.", "false" ] } ] }, { "ch": "The conditioned air flow is ducted and released into cabin from:", "ansGr": [ { "ans": [ "Ceiling vents.", "true" ] }, { "ans": [ "Floor-level vents.", "false" ] }, { "ans": [ "Side wall vents.", "false" ] } ] }, { "ch": "The components in the vapor cycle air conditioning system are:", "ansGr": [ { "ans": [ "Receiver dryer, expansion valve, evaporator, compressor, condenser.", "true" ] }, { "ans": [ "Pack valve, heat exchangers, air cycle machine, expansion valve, compressor.", "false" ] }, { "ans": [ "Pack valve, heat exchangers, air cycle machine, water separator, bypass valve.", "false" ] } ] }, { "ch": "Which types of the refrigerant are used commonly in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "R12 and R134a.", "true" ] }, { "ans": [ "R12 and R12a.", "false" ] }, { "ans": [ "R134 and R134a.", "false" ] } ] }, { "ch": "What is the function of the receiver dryer in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "A reservoir contains the refrigerant.", "true" ] }, { "ans": [ "A component dries the refrigerant.", "false" ] }, { "ans": [ "A component heats the refrigerant.", "false" ] } ] }, { "ch": "The vapor cycle air conditioning system is:", "ansGr": [ { "ans": [ "A closed system.", "true" ] }, { "ans": [ "An opened system.", "false" ] }, { "ans": [ "A semi-closed system.", "false" ] } ] }, { "ch": "What is the normal route of the air flow in the air cycle air conditioning system?", "ansGr": [ { "ans": [ "Pack valve, primary heat exchanger, air cycle machine (compressor), secondary heat exchanger, air cycle machine (turbine), and water separator.", "true" ] }, { "ans": [ "Pack valve, secondary heat exchanger, air cycle machine (turbine), primary heat exchanger, air cycle machine (compressor), and water separator.", "false" ] }, { "ans": [ "Pack valve, primary heat exchanger, air cycle machine (turbine), secondary heat exchanger, air cycle machine (compressor), and water separator.", "false" ] } ] }, { "ch": "How is the heat carried from the cabin to the outside air in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "By a refrigerant which changes from a liquid to a vapour and back again.", "true" ] }, { "ans": [ "By two heat exchangers: primary and secondary one.", "false" ] }, { "ans": [ "By turbine section which expands the air to decrease the temperature in the cabin.", "false" ] } ] }, { "ch": "How can the air cycle machine turn?", "ansGr": [ { "ans": [ "The compressed air passes through and drives the turbine. The turbine drives the ACM.", "true" ] }, { "ans": [ "There is an electric motor which drives the compressor and the turbine of the ACM.", "false" ] }, { "ans": [ "The compressed air passes through and drives the compressor. The compressor drives the ACM.", "false" ] } ] }, { "ch": "What happens to the water separator if the ACM turbine outlet air is too cold?", "ansGr": [ { "ans": [ "The refrigeration bypass valve is designed to keep the air flowing through the water separator above freezing temperature.", "true" ] }, { "ans": [ "The trim air valve will open to add more hot bleed air to the water separator for preventing the ice forming.", "false" ] }, { "ans": [ "The trim air valve will close to reduce the cold air to the water separator for preventing the ice forming.", "false" ] } ] }, { "ch": "How does the water separator operate?", "ansGr": [ { "ans": [ "The water separator operates with no moving parts.", "true" ] }, { "ans": [ "An electric motor turns the water separator to remove water.", "false" ] }, { "ans": [ "Water will be removed from the air by the centrifugal force.", "false" ] } ] }, { "ch": "What is the normal route of the refrigerant in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Receiver dryer, expansion valve, evaporator, compressor, condenser.", "true" ] }, { "ans": [ "Receiver dryer, expansion valve, condenser, compressor, evaporator.", "false" ] }, { "ans": [ "Receiver dryer, evaporator, expansion valve, compressor, condenser.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, the state of refrigerant in the evaporator is:", "ansGr": [ { "ans": [ "Low pressure and low temperature.", "true" ] }, { "ans": [ "High pressure and low temperature.", "false" ] }, { "ans": [ "High pressure and high temperature.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, the state of refrigerant in the condenser is:", "ansGr": [ { "ans": [ "High pressure and high temperature.", "true" ] }, { "ans": [ "Low pressure and low temperature.", "false" ] }, { "ans": [ "High pressure and low temperature.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, the form of refrigerant in the receiver dryer is:", "ansGr": [ { "ans": [ "Liquid.", "true" ] }, { "ans": [ "Vapor.", "false" ] }, { "ans": [ "Solid.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, the form of refrigerant in the compressor is:", "ansGr": [ { "ans": [ "Vapor.", "true" ] }, { "ans": [ "Liquid.", "false" ] }, { "ans": [ "Solid.", "false" ] } ] }, { "ch": "What is the function of the condenser in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "The condenser transfers the heat from the refrigerant to the outside air.", "true" ] }, { "ans": [ "The condenser transfers the heat from the cabin air to the refrigerant.", "false" ] }, { "ans": [ "The condenser transforms the refrigerant from liquid into vapor.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, the heat of the cabin air is absorbed into the refrigerant by:", "ansGr": [ { "ans": [ "Evaporator.", "true" ] }, { "ans": [ "Condenser.", "false" ] }, { "ans": [ "Expansion valve.", "false" ] } ] }, { "ch": "Where are the service valves in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "One valve is located in the high side of the system and the other in the low side.", "true" ] }, { "ans": [ "One valve is located in the condenser and the other in the receiver dryer.", "false" ] }, { "ans": [ "One valve is located in the evaporator and the other in the compressor.", "false" ] } ] }, { "ch": "Which is the position of the compressor isolation valve for normal flow of refrigerant in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Fully open.", "true" ] }, { "ans": [ "Fully close.", "false" ] }, { "ans": [ "Intermediate position.", "false" ] } ] }, { "ch": "Which is the position of the compressor isolation valve for replacing the compressor in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Fully close.", "true" ] }, { "ans": [ "Fully open.", "false" ] }, { "ans": [ "Intermediate position.", "false" ] } ] }, { "ch": "Which is the position of the compressor isolation valve for servicing the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Intermediate position.", "true" ] }, { "ans": [ "Fully close.", "false" ] }, { "ans": [ "Fully open.", "false" ] } ] }, { "ch": "Which components are essential for servicing the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "A manifold set contains three hose fittings, two O-ring sealed valves, and two gauges.", "true" ] }, { "ans": [ "A manifold set contains three hose fittings, three O-ring sealed valves, and two gauges.", "false" ] }, { "ans": [ "A manifold set contains two hose fittings, two O-ring sealed valves, and two gauges.", "false" ] } ] }, { "ch": "What is the color of the hose for low side service in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Blue.", "true" ] }, { "ans": [ "Yellow.", "false" ] }, { "ans": [ "Red.", "false" ] } ] }, { "ch": "What is the color of the hose for system service in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Yellow.", "true" ] }, { "ans": [ "Blue.", "false" ] }, { "ans": [ "Red.", "false" ] } ] }, { "ch": "What is the color of the hose for high side service in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Red.", "true" ] }, { "ans": [ "Blue.", "false" ] }, { "ans": [ "Yellow.", "false" ] } ] }, { "ch": "What components are necessary for emptying the system of refrigerant?", "ansGr": [ { "ans": [ "A service unit.", "true" ] }, { "ans": [ "A manifold set.", "false" ] }, { "ans": [ "A manifold set and a refrigerant container.", "false" ] } ] }, { "ch": "What is the purpose of the vacuum pump for the maintenance of the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Removing all of water in the system.", "true" ] }, { "ans": [ "Removing all of refrigerant in the system.", "false" ] }, { "ans": [ "Removing all of air in the system.", "false" ] } ] }, { "ch": "The electronic infrared leak detector can detect leaks that would lose:", "ansGr": [ { "ans": [ "Less than 1/4 ounce of refrigerant per year.", "true" ] }, { "ans": [ "Less than 1/2 ounce of refrigerant per year.", "false" ] }, { "ans": [ "Less than 3/4 ounce of refrigerant per year.", "false" ] } ] }, { "ch": "In the vapor cycle air conditioning system, after replacing a component in the compressor.", "ansGr": [ { "ans": [ "Oil may be added due to the trapped oil in the replaced unit.", "true" ] }, { "ans": [ "Refrigerant may be added due to the trapped refrigerant in the replaced unit.", "false" ] }, { "ans": [ "Do not add anything.", "false" ] } ] }, { "ch": "How is the lack of the refrigerant detected in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "Bubbles present in the sight glass of the receiver dryer.", "true" ] }, { "ans": [ "Bubbles present in the sight glass of the compressor.", "false" ] }, { "ans": [ "Bubbles present in the sight glass of the expansion valve.", "false" ] } ] }, { "ch": "Which type of test should be done to verify the proper operation of a vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "A performance test.", "true" ] }, { "ans": [ "A leak test.", "false" ] }, { "ans": [ "An operational test.", "false" ] } ] }, { "ch": "Which components are essential to carry out the performance test of the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "A thermometer.", "true" ] }, { "ans": [ "A service unit.", "false" ] }, { "ans": [ "A manifold set.", "false" ] } ] }, { "ch": "The feel test of the vapor cycle air conditioning system is related to:", "ansGr": [ { "ans": [ "The temperature of the high side components is hot and the low side components is cool.", "true" ] }, { "ans": [ "The operating the system and checking parameters to ensure they are in the normal range.", "false" ] }, { "ans": [ "Make sure the quantity of the refrigerant in the system and the oil in the compressor are sufficient.", "false" ] } ] }, { "ch": "The temperature of the lines on both sides of the receiver dryer should be:", "ansGr": [ { "ans": [ "The same temperature on both sides of the receiver dryer.", "true" ] }, { "ans": [ "The different temperature due to the different sides.", "false" ] }, { "ans": [ "The different temperature due to the demand of cooled air.", "false" ] } ] }, { "ch": "Which tasks must be done before opening the vapor cycle air conditioning system for maintenance?", "ansGr": [ { "ans": [ "Purging the system.", "true" ] }, { "ans": [ "Servicing the system.", "false" ] }, { "ans": [ "Draining the system.", "false" ] } ] }, { "ch": "How is the oil quantity in the compressor crankcase checked?", "ansGr": [ { "ans": [ "Removing a filler plug and using a dip stick.", "true" ] }, { "ans": [ "Checking the sight glass on the compressor.", "false" ] }, { "ans": [ "Draining and measuring the oil quantity.", "false" ] } ] }, { "ch": "When is the vapor cycle air conditioning system charged?", "ansGr": [ { "ans": [ "Immediately after evacuation of the system is completed.", "true" ] }, { "ans": [ "Immediately after drainage of the system is completed.", "false" ] }, { "ans": [ "Immediately after purging the system is completed", "false" ] } ] }, { "ch": "Where is the temperature monitored?", "ansGr": [ { "ans": [ "Cabin, Cockpit, conditioned air ducts, and distribution air ducts.", "true" ] }, { "ans": [ "Cabin, Cockpit, mixing chamber, and distribution air ducts.", "false" ] }, { "ans": [ "Cabin, Cockpit, conditioned air ducts, and mixing chamber.", "false" ] } ] }, { "ch": "What happens if the air passes through the compressor and the turbine of the air cycle machine?", "ansGr": [ { "ans": [ "The pressure and temperature increases at the compressor outlet; and the pressure and temperature decreases at the turbine outlet.", "true" ] }, { "ans": [ "The pressure and temperature decreases at the compressor outlet; and the pressure and temperature increases at the turbine outlet.", "false" ] }, { "ans": [ "The pressure decreases at the compressor outlet; and the temperature increases at the turbine outlet.", "false" ] } ] }, { "ch": "How can the refrigeration bypass valve regulates the temperature of the ACM discharge air?", "ansGr": [ { "ans": [ "The refrigeration bypass valve opens and bypasses the warm air around the ACM into the upstream of the water separator.", "true" ] }, { "ans": [ "The refrigeration bypass valve opens and bypasses the cool air around the ACM into the upstream of the water separator.", "false" ] }, { "ans": [ "The refrigeration bypass valve closes and stops the warm air around the ACM into the upstream of the water separator.", "false" ] } ] }, { "ch": "How are the pack valves controlled and operated?", "ansGr": [ { "ans": [ "Pack valves are electrically controlled and pneumatically operated.", "true" ] }, { "ans": [ "Pack valves are pneumatically controlled and electrically operated.", "false" ] }, { "ans": [ "Pack valves are electrically controlled and electronically operated.", "false" ] } ] }, { "ch": "How can the heat exchanger change the temperature of the air inside the system in flight?", "ansGr": [ { "ans": [ "The ram air doors are modulated to increase or decrease ram air flow to the heat exchanger.", "true" ] }, { "ans": [ "The pack valve doors are modulated to increase or decrease bleed air flow to the heat exchanger.", "false" ] }, { "ans": [ "The pack valve doors are modulated to increase or decrease ram air flow to the heat exchanger.", "false" ] } ] }, { "ch": "What happens to the refrigerant if it passes through the evaporator in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "It transforms from the low pressure liquid into the low pressure/ low temperature vapor.", "true" ] }, { "ans": [ "It transforms from the low pressure liquid into the high pressure/ low temperature vapor.", "false" ] }, { "ans": [ "It transforms from the high pressure/ high temperature vapor into the high pressure liquid.", "false" ] } ] }, { "ch": "What happens to the refrigerant if it passes through the condenser in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "It transforms from the high pressure/ high temperature vapor into the high pressure liquid.", "true" ] }, { "ans": [ "It transforms from the low pressure liquid into the high pressure/ low temperature vapor.", "false" ] }, { "ans": [ "It transforms from the low pressure liquid into the low pressure/ low temperature vapor.", "false" ] } ] }, { "ch": "What happens to the receiver dryer if you see bubbles in its sight glass?", "ansGr": [ { "ans": [ "The receiver dryer needs to be serviced.", "true" ] }, { "ans": [ "The receiver dryer is too hot.", "false" ] }, { "ans": [ "The receiver dryer is too cold.", "false" ] } ] }, { "ch": "Why does the water in the receiver dryer have to be captured by the desiccant?", "ansGr": [ { "ans": [ "The refrigerant combines with water to form an acid. Acid can deteriorate the components and tubing in the system.", "true" ] }, { "ans": [ "Water can change the temperature of the refrigerant and prevent the refrigerant from transforming from liquid into vapo.", "false" ] }, { "ans": [ "The boiling point of water is different from the refrigerant's one, which can reduce the performance of the system.", "false" ] } ] }, { "ch": "What is the diffrence between the R134a valve fittings and Schrader valve fittings in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "The R134a valve fittings are a quick disconnect type.", "true" ] }, { "ans": [ "The Schrader valve fittings are a quick disconnect type.", "false" ] }, { "ans": [ "The R134a valve fittings attach to Schrader valve threads.", "false" ] } ] }, { "ch": "What are the gauges on the manifold set dedicated?", "ansGr": [ { "ans": [ "One for the low side of the system and the other for the high side.", "true" ] }, { "ans": [ "One for the low temperature side of the system and the other for the high temperature side.", "false" ] }, { "ans": [ "One for the liquid side of the system and the other for the vapor side.", "false" ] } ] }, { "ch": "What happens to the center fitting if the pressure valves of the manifold set are turned cloclwise and then counterlockwise?", "ansGr": [ { "ans": [ "The center fitting is isolated and then opened.", "true" ] }, { "ans": [ "The center fitting is opened and then isolated.", "false" ] }, { "ans": [ "The center fitting is not changed much.", "false" ] } ] }, { "ch": "Which type of refrigerant leak is the most difficult to detect in the vapor cycle air conditioning?", "ansGr": [ { "ans": [ "The leak from the old hoses.", "true" ] }, { "ans": [ "The leak from the loose fitings.", "false" ] }, { "ans": [ "The leak from the cracked components.", "false" ] } ] }, { "ch": "What should the quantity oil be added in the vapor cycle air conditioning system?", "ansGr": [ { "ans": [ "1/4 ounce of oil is added for 01 pound of refrigerant added to the system.", "true" ] }, { "ans": [ "Oil should be added up to the \"FULL\" level notch on the sight glass.", "false" ] }, { "ans": [ "Oil should be added until the bubbles in the sigh glass disappear.", "false" ] } ] }, { "ch": "A test involves operating the system and checking parameters to ensure they are in the normal range is:", "ansGr": [ { "ans": [ "A performance test.", "true" ] }, { "ans": [ "A leak test.", "false" ] }, { "ans": [ "An operational test.", "false" ] } ] }, { "ch": "How is the performance test of the vapor cycle air conditioning system carried out?", "ansGr": [ { "ans": [ "Measure the temperature of the air that is cooled by the evaporator.", "true" ] }, { "ans": [ "Measure the temperature of the air that is heated by the condenser.", "false" ] }, { "ans": [ "Measure the quantity of refrigerant in the system by manifold set.", "false" ] } ] }, { "ch": "Which tasks must be done for flushing the vapor cycle air condition system?", "ansGr": [ { "ans": [ "Removing the receiver dryer.", "true" ] }, { "ans": [ "Removing the expansion valve.", "false" ] }, { "ans": [ "Removing the evaporator.", "false" ] } ] }, { "ch": "What happens to the vapor cycle air conditioning system if there is the moisture in the system?", "ansGr": [ { "ans": [ "The moisture may freeze in the expansion valve, it could completely block the refrigerant flow.", "true" ] }, { "ans": [ "The moisture may change the temperature and pressure of refrigerant of the system.", "false" ] }, { "ans": [ "The moisture may cause the lack of the refrigerant and oil of the system.", "false" ] } ] }, { "ch": "Which is the valve mixes the warm bleed air that bypassed the air cycle cooling process with the cold air produced for the temperature control in cockpit and cabin?", "ansGr": [ { "ans": [ "The trim air valve.", "true" ] }, { "ans": [ "The refrigeration bypass valve.", "false" ] }, { "ans": [ "The expansion valve.", "false" ] } ] }, { "ch": "How do the temperature sensors in cabin and ducts operate?", "ansGr": [ { "ans": [ "The operation of these sensors are related to resistance, particularly the resistance changes as temperature changes.", "true" ] }, { "ans": [ "The operation of these sensors are related to pressure, particularly the pressure changes as temperature changes.", "false" ] }, { "ans": [ "The operation of these sensors are related to voltage, particularly the voltage changes as temperature changes.", "false" ] } ] }, { "ch": "How is the cabin humidity controlled in a water infiltration system?", "ansGr": [ { "ans": [ "Water is pumped from a holding tank and sprayed into the conditioned air before it is directed into the cabin.", "true" ] }, { "ans": [ "The function of the water separator in the air cycle air conditioning system will be reduced to increase the humidity.", "false" ] }, { "ans": [ "The condenser supplies the water into the system to control the humidity level in the cabin.", "false" ] } ] }, { "ch": "On turbine powered aircraft, the temperature controlled air from the air conditioning system is:", "ansGr": [ { "ans": [ "The air that is used to pressurize the cabin.", "true" ] }, { "ans": [ "The air that is not used to pressurize the cabin.", "false" ] }, { "ans": [ "The air that is used to change the refrigerant temperature.", "false" ] } ] }, { "ch": "Where are the temperature controller and the temperature control regulator located in aircraft?", "ansGr": [ { "ans": [ "They are located in the electronics bay.", "true" ] }, { "ans": [ "They are located in the flight deck.", "false" ] }, { "ans": [ "They are located in the cabin.", "false" ] } ] }, { "ch": "Where are the temperature selectors located in aircraft?", "ansGr": [ { "ans": [ "They are located in the flight deck and the cabin.", "true" ] }, { "ans": [ "They are located in the electronics bay and the flight deck.", "false" ] }, { "ans": [ "They are located in the cabin and the electronics bay.", "false" ] } ] }, { "ch": "How does the temperature controller operate as the temperature selector is adjusted?", "ansGr": [ { "ans": [ "The temperature controller compares the actual temperature signals received from the various sensors with the desired temperature input.", "true" ] }, { "ans": [ "The temperature controller controls directly the air cycle machine to increase or decrease the quantity of the conditioned air flow into the cabin.", "false" ] }, { "ans": [ "The temperature controller controls directly the pack valve to increase or decrease the quantity of the conditioned air flow into the cabin.", "false" ] } ] }, { "ch": "What is the type of temperature sensor used in cabin?", "ansGr": [ { "ans": [ "Thermistor.", "true" ] }, { "ans": [ "Thermal switch.", "false" ] }, { "ans": [ "Thermocouple.", "false" ] } ] }, { "ch": "What is the temperature selector?", "ansGr": [ { "ans": [ "A rheostat that varies its resistance as the knob is turned.", "true" ] }, { "ans": [ "A rheostat that varies its voltage as the knob is turned.", "false" ] }, { "ans": [ "A rheostat that varies its ampere as the knob is turned.", "false" ] } ] }, { "ch": "In order to control the cabin temperature, the electric signal output of the bridge circuit will be sent to:", "ansGr": [ { "ans": [ "The trim air valve.", "true" ] }, { "ans": [ "The pack valve.", "false" ] }, { "ans": [ "The bypass valve.", "false" ] } ] }, { "ch": "Which refrigerant is safer for the environment?", "ansGr": [ { "ans": [ "R134a", "true" ] }, { "ans": [ "R12.", "false" ] }, { "ans": [ "R13.", "false" ] } ] }, { "ch": "Which the statement about refrigerant is correct?", "ansGr": [ { "ans": [ "R12 and 134a should not be mixed.", "true" ] }, { "ans": [ "R12 and 134a can be mixed in some special cases.", "false" ] }, { "ans": [ "R12 an R134a are interchangeble fully.", "false" ] } ] }, { "ch": "Why is water in the refrigerant removed?", "ansGr": [ { "ans": [ "It prevents the component from deteriorating.", "true" ] }, { "ans": [ "It increases the cooling efficiency.", "false" ] }, { "ans": [ "It prevent the formation of air bubles.", "false" ] } ] }, { "ch": "What happens to the system if water exists in the refrigerant?", "ansGr": [ { "ans": [ "Ice is formed in the refrigerant and blocks the flow.", "true" ] }, { "ans": [ "Water in the refrigerant vapourizes and forms air bubles.", "false" ] }, { "ans": [ "The heat exchange of the system is inefficient", "false" ] } ] }, { "ch": "The compressor in the vapor cycle air conditioning system is designed to compress:", "ansGr": [ { "ans": [ "Vapor.", "true" ] }, { "ans": [ "Liquid.", "false" ] }, { "ans": [ "Vapor or liquid.", "false" ] } ] }, { "ch": "Which component is used commonly to detect the leak in pneumatic system ducting?", "ansGr": [ { "ans": [ "Continuous loop fire detector.", "true" ] }, { "ans": [ "Fire spot detector.", "false" ] }, { "ans": [ "Thermal switch.", "false" ] } ] }, { "ch": "Which component is used to detect the fire in the cabin, cargo bays, lavatories?", "ansGr": [ { "ans": [ "Smoke detector.", "true" ] }, { "ans": [ "Thermal switch.", "false" ] }, { "ans": [ "Continuous loop fire detector.", "false" ] } ] }, { "ch": "Which component is used to detect the overheat in the air conditioning systems?", "ansGr": [ { "ans": [ "Thermal switch.", "true" ] }, { "ans": [ "Continuous loop fire detector.", "false" ] }, { "ans": [ "Thermocouple.", "false" ] } ] }, { "ch": "What is the function of the continuous loop fire detector in the air conditioning system?", "ansGr": [ { "ans": [ "The continuous loop fire detector can detect the pneumatic leak from the pneumatic ducts.", "true" ] }, { "ans": [ "The continuous loop fire detector can detect the overheat of the air conditioning system.", "false" ] }, { "ans": [ "The continuous loop fire detector can detect the fire or smoke the air conditioning system.", "false" ] } ] }, { "ch": "Where are the continuous loop fire detectors located?", "ansGr": [ { "ans": [ "They will be run the length of pneumatic ducting or around a bay containing pneumatic lines such as the air conditioning and APU bays.", "true" ] }, { "ans": [ "They will be installed around the area where have the risk of fire such as the avionic compartment and FWD/ AFT cargo compartment.", "false" ] }, { "ans": [ "They will be installed in the area where have the risk of fire such as the avionic compartment, particularly on the electric and electronic components.", "false" ] } ] }, { "ch": "How is the pneumatic leak indicated?", "ansGr": [ { "ans": [ "Warning annunciations occur in the cockpit on the central warning panel.", "true" ] }, { "ans": [ "Warning annunciations occur in the cabin on the flight attendant panel.", "false" ] }, { "ans": [ "The color indicators in the air conditioning bay will change color as contacting the heat.", "false" ] } ] }, { "ch": "How do the thermal switches protect the air conditioning pack operation?", "ansGr": [ { "ans": [ "At the pack outlet before the air enters the distribution system, temperature detection switches shut down the pack should an overheat occur.", "true" ] }, { "ans": [ "At the pack outlet before the air enters the distribution system, temperature detection switches reduce the temperature of the pack should an overheat occur.", "false" ] }, { "ans": [ "At the pack outlet before the air enters the distribution system, temperature detection switches change the mode of the pack should an overheat occur.", "false" ] } ] }, { "ch": "What can technicians perform in case the overheat occurred due to a failure of the automatic temperature control system?", "ansGr": [ { "ans": [ "Technicians can reset and operate again the pack manually.", "true" ] }, { "ans": [ "Technicians can replace the air cycle machine by new one.", "false" ] }, { "ans": [ "Technicians can perform the leak check of the whole system.", "false" ] } ] }, { "ch": "What happen if there is the smoke in the cabin, cargo bays, or lavatories?", "ansGr": [ { "ans": [ "Warnings are indicated on the central warning system.", "true" ] }, { "ans": [ "The smoke detectors warn every person in aircraft.", "false" ] }, { "ans": [ "The fire will be extinguished automatically.", "false" ] } ] }, { "ch": "Which the cabin altitude will the excess cabin altitude sensors warn?", "ansGr": [ { "ans": [ "Around 10000 feet", "true" ] }, { "ans": [ "Around 8000 feet", "false" ] }, { "ans": [ "Around 6000 feet", "false" ] } ] }, { "ch": "How is the excess cabin altitude warned?", "ansGr": [ { "ans": [ "A warning is annunciated on the central warning system. The warning may be aural or visual.", "true" ] }, { "ans": [ "A warning is annunciated on the flight attendant panel. The warning may be aural or visual.", "false" ] }, { "ans": [ "A warning is annunciated on the flight attendant panel. The warning may be visual by changing colors.", "false" ] } ] }, { "ch": "What is the symptom the passengers have to suffer during the excess cabin altitude?", "ansGr": [ { "ans": [ "The hypoxia", "true" ] }, { "ans": [ "The jet lag.", "false" ] }, { "ans": [ "The dehydration.", "false" ] } ] }, { "ch": "What can the flight crew perform if there is the excess cabin altitude?", "ansGr": [ { "ans": [ "Flight crew may immediately utilize emergency oxygen to maintain control of the aircraft.", "true" ] }, { "ans": [ "Flight crew may immediately lower the aircraft down to 8000 feet altitude.", "false" ] }, { "ans": [ "Flight crew may immediately lower the aircraft down to 10000 feet altitude.", "false" ] } ] }, { "part": "M13.12 ATA 26", "ch": "What are the three necessary components for a fire?", "ansGr": [ { "ans": [ "Fuel, heat, oxygen", "true" ] }, { "ans": [ "Oxygen, hydrogen, fire", "false" ] }, { "ans": [ "Water, heat, wood", "false" ] } ] }, { "ch": "What defines a fire zone in an aircraft?", "ansGr": [ { "ans": [ "An area needing fire detection/extinguishing equipment", "true" ] }, { "ans": [ "An area with high humidity", "false" ] }, { "ans": [ "A compartment for crew rest", "false" ] } ] }, { "ch": "What principle does the thermocouple fire warning system operate on?", "ansGr": [ { "ans": [ "Rate of temperature rise", "true" ] }, { "ans": [ "Constant temperature", "false" ] }, { "ans": [ "Pressure changes", "false" ] } ] }, { "ch": "What shape are the fixed containers typically used for storing fire extinguishing agents ?", "ansGr": [ { "ans": [ "Spherical", "true" ] }, { "ans": [ "Cylindrical", "false" ] }, { "ans": [ "Cubical", "false" ] } ] }, { "ch": "Where is the smoke detector in the lavatory typically located?", "ansGr": [ { "ans": [ "In the ceiling of the lavatory", "true" ] }, { "ans": [ "On the wall next to the sink", "false" ] }, { "ans": [ "On the floor", "false" ] } ] }, { "ch": "What type of materials are involved in Class A fires?", "ansGr": [ { "ans": [ "Ordinary combustible materials like wood, cloth, and paper", "true" ] }, { "ans": [ "Flammable liquids, petroleum oils, greases", "false" ] }, { "ans": [ "Combustible metals, such as magnesium, titanium", "false" ] } ] }, { "ch": "Where is the manufacturer's date stamp usually placed on the discharge cartridge?", "ansGr": [ { "ans": [ "On the face of the cartridge", "true" ] }, { "ans": [ "Inside the cartridge", "false" ] }, { "ans": [ "On the bottom", "false" ] } ] }, { "ch": "Which type of materials can cause class D fires?", "ansGr": [ { "ans": [ "Combustible metals like magnesium and titanium", "true" ] }, { "ans": [ "Ordinary combustibles like wood,cloth, paper, rubber, and plastics", "false" ] }, { "ans": [ "Flammable liquids, petroleum oils, greases, tars, oil-based paints", "false" ] } ] }, { "ch": "Which type of materials can cause class B fires?", "ansGr": [ { "ans": [ "Flammable liquids, petroleum oils, greases, tars, oil-based paints", "true" ] }, { "ans": [ "Combustible metals like magnesium and titanium", "false" ] }, { "ans": [ "Energized electrical equipment", "false" ] } ] }, { "ch": "What principles are the design of pneumatic single point detectors based on?", "ansGr": [ { "ans": [ "Gas laws", "true" ] }, { "ans": [ "Electrical principles", "false" ] }, { "ans": [ "Hydraulic principles", "false" ] } ] }, { "ch": "What does the sensing element of the pneumatic single point detector consist of?", "ansGr": [ { "ans": [ "A helium-filled tube", "true" ] }, { "ans": [ "An air-filled tube", "false" ] }, { "ans": [ "A nitrogen-filled tube", "false" ] } ] }, { "ch": "What is the closed helium-filled tube connected to at one end?", "ansGr": [ { "ans": [ "A responder assembly", "true" ] }, { "ans": [ "A pressure gauge", "false" ] }, { "ans": [ "A thermometer", "false" ] } ] }, { "ch": "What component is central to the light refraction type of smoke detector?", "ansGr": [ { "ans": [ "Photoelectric cell", "true" ] }, { "ans": [ "Temperature sensor", "false" ] }, { "ans": [ "Acoustic sensor", "false" ] } ] }, { "ch": "How do smoke particles interact with the light in a light refraction type smoke detector?", "ansGr": [ { "ans": [ "They refract the light to the photoelectric cell", "true" ] }, { "ans": [ "They absorb the light", "false" ] }, { "ans": [ "They block the light entirely", "false" ] } ] }, { "ch": "What happens when the photoelectric cell detects enough refracted light?", "ansGr": [ { "ans": [ "It creates an electrical current that sets off a light", "true" ] }, { "ans": [ "It turns off the smoke detector", "false" ] }, { "ans": [ "It decreases the sensitivity of the detector", "false" ] } ] }, { "ch": "A Systron-Donner fire detection system uses.", "ansGr": [ { "ans": [ "Helium gas.", "true" ] }, { "ans": [ "Nitrogen gas.", "false" ] }, { "ans": [ "Oxygen gas.", "false" ] } ] }, { "ch": "How does the ionization type smoke detector generate an alarm signal?", "ansGr": [ { "ans": [ "By detecting a change in ion density due to smoke", "true" ] }, { "ans": [ "By measuring the temperature increase", "false" ] }, { "ans": [ "By monitoring carbon monoxide levels", "false" ] } ] }, { "ch": "What are the two types of optical sensors used as flame detectors?", "ansGr": [ { "ans": [ "Infrared (IR) and ultraviolet", "true" ] }, { "ans": [ "Thermal and ultraviolet", "false" ] }, { "ans": [ "Magnetic and electric", "false" ] } ] }, { "ch": "What does the digital circuit control in the flame detector?", "ansGr": [ { "ans": [ "The alarm sensitivity level", "true" ] }, { "ans": [ "The power supply for detector", "false" ] }, { "ans": [ "The temperature in detector", "false" ] } ] }, { "ch": "When does the solder sealing the nozzles of the fire extinguisher bottle melt?", "ansGr": [ { "ans": [ "When temperature reached 75°C", "true" ] }, { "ans": [ "When temperature reached 100°C", "false" ] }, { "ans": [ "When temperature reached 150°C", "false" ] } ] }, { "ch": "The thermistor properties of the sensing element will ?", "ansGr": [ { "ans": [ "Remain unchanged for the life of the element", "true" ] }, { "ans": [ "Be changed after priod of time", "false" ] }, { "ans": [ "Be changed after each time of an overheat event", "false" ] } ] }, { "ch": "What happens at a carbon monoxide concentration of 100 parts per million in chemical color ch ange detectors?", "ansGr": [ { "ans": [ "The color changes in 2 to 5 minutes", "true" ] }, { "ans": [ "The color changes in 15 to 30 minutes", "false" ] }, { "ans": [ "The color changes immediately", "false" ] } ] }, { "ch": "What is the relationship between the concentration of carbon monoxide and the transition time inchemical color change detectors?", "ansGr": [ { "ans": [ "Inversely related", "true" ] }, { "ans": [ "Directly proportional", "false" ] }, { "ans": [ "Randomly related", "false" ] } ] }, { "ch": "What is the main function of carbon dioxide as an extinguishing agent?", "ansGr": [ { "ans": [ "It smothers a fire and deprives it of oxygen", "true" ] }, { "ans": [ "It smothers a fire and It absorbs oxygen", "false" ] }, { "ans": [ "It increases temperature", "false" ] } ] }, { "ch": "Which fire extinguishing agent is non-combustible and does not react with most substances?", "ansGr": [ { "ans": [ "Carbon dioxide (CO₂)", "true" ] }, { "ans": [ "Dry powder", "false" ] }, { "ans": [ "Water", "false" ] } ] }, { "ch": "Which type of fires is CO₂ not effective on?", "ansGr": [ { "ans": [ "Fires involving chemicals containing their own oxygen supply", "true" ] }, { "ans": [ "Fires involving electrical equipment", "false" ] }, { "ans": [ "Fires involving metals", "false" ] } ] }, { "ch": "What classes of fires are dry powder extinguishers best for use on?", "ansGr": [ { "ans": [ "Class B, C, and D", "true" ] }, { "ans": [ "Class A and B", "false" ] }, { "ans": [ "Class B and C", "false" ] } ] }, { "ch": "What are examples of dry powder chemicals?", "ansGr": [ { "ans": [ "Sodium bicarbonate, potassium bicarbonate", "true" ] }, { "ans": [ "Sodium chloride and potassium chloride", "false" ] }, { "ans": [ "Sodium hydroxide and potassium hydroxide", "false" ] } ] }, { "ch": "What type of detection system is typically combined with a fixed Halon extinguishing system in cargo compartments?", "ansGr": [ { "ans": [ "Smoke type detection", "true" ] }, { "ans": [ "Heat type detection", "false" ] }, { "ans": [ "Light type detection", "false" ] } ] }, { "ch": "Why might the master warning lights and fire warning aural be prevented from operating during takeoff?", "ansGr": [ { "ans": [ "To avoid distracting the pilot", "true" ] }, { "ans": [ "To reduce noise levels", "false" ] }, { "ans": [ "To prevent false alarms", "false" ] } ] }, { "ch": "What should the flight crew do if the cargo fire warning light comes on during flight?", "ansGr": [ { "ans": [ "Perform the appropriate fire suppression procedures", "true" ] }, { "ans": [ "Land at the nearest airport immediately", "false" ] }, { "ans": [ "Continue normal operations", "false" ] } ] }, { "ch": "What occurs when smoke particles are present in the smoke detection chamber?", "ansGr": [ { "ans": [ "The smoke particles reflect more light onto the scatter detector", "true" ] }, { "ans": [ "The smoke particles reduce airflow", "false" ] }, { "ans": [ "The smoke particles absorb all light", "false" ] } ] }, { "ch": "When the fire handle is operated it", "ansGr": [ { "ans": [ "Cuts off field current, hydraulics and fuel and operates fire extinguishers", "true" ] }, { "ans": [ "Cuts off fuel. Generator remains on line to provide electrical power", "false" ] }, { "ans": [ "Operates fire extinguisher only", "false" ] } ] }, { "ch": "What happens if there is a defective diode or contamination in the smoke detector?", "ansGr": [ { "ans": [ "The detector changes to another set of diodes and sends a fault message", "true" ] }, { "ans": [ "The detector increases sensitivity", "false" ] }, { "ans": [ "The detector stops monitoring", "false" ] } ] }, { "ch": "What is the function of the water separator in the smoke detection system?", "ansGr": [ { "ans": [ "To remove moisture from the air", "true" ] }, { "ans": [ "To increase humidity", "false" ] }, { "ans": [ "To cool the air", "false" ] } ] }, { "ch": "How does the smoke detector respond if it detects contamination?", "ansGr": [ { "ans": [ "It switches to the other set of diodes", "true" ] }, { "ans": [ "It increases the intensity of the LED", "false" ] }, { "ans": [ "It shuts down the system", "false" ] } ] }, { "ch": "Why are fire extinguisher containers checked periodically?", "ansGr": [ { "ans": [ "To verify the pressure is within limits", "true" ] }, { "ans": [ "To check the weight", "false" ] }, { "ans": [ "To measure the temperature", "false" ] } ] }, { "ch": "What are the funtions of pneumatic detectors ?", "ansGr": [ { "ans": [ "Averaging function and discrete function", "true" ] }, { "ans": [ "Averaging function and smoke detection function", "false" ] }, { "ans": [ "Discrete function and fire detection function", "false" ] } ] }, { "ch": "How often should fire extinguisher containers be checked?", "ansGr": [ { "ans": [ "Periodically, as specified by maintenance guidelines", "true" ] }, { "ans": [ "Every five years", "false" ] }, { "ans": [ "Annually", "false" ] } ] }, { "ch": "What powers the lavatory smoke detector in an aircraft?", "ansGr": [ { "ans": [ "28-volt DC left/right main DC bus", "true" ] }, { "ans": [ "12-volt DC battery", "false" ] }, { "ans": [ "28-volt AC power", "false" ] } ] }, { "ch": "What does the timing circuit create in the lavatory smoke detector system?", "ansGr": [ { "ans": [ "Intermittent ground", "true" ] }, { "ans": [ "Continuous ground", "false" ] }, { "ans": [ "Increased voltage", "false" ] } ] }, { "ch": "What role does the smoke detection circuit play in the lavatory smoke detector system?", "ansGr": [ { "ans": [ "It makes a ground for the relay", "true" ] }, { "ans": [ "It increases the voltage", "false" ] }, { "ans": [ "It deactivates the alarm", "false" ] } ] }, { "ch": "Why are fire detector sensing elements at risk during maintenance?", "ansGr": [ { "ans": [ "Their location and small size increase the chance of damage", "true" ] }, { "ans": [ "They are made of fragile materials", "false" ] }, { "ans": [ "Their large size makes them prone to damage", "false" ] } ] }, { "ch": "What is a common cause of intermittent alarms in engine fire detection systems?", "ansGr": [ { "ans": [ "Loose wire occasionally touching a nearby terminal", "true" ] }, { "ans": [ "Overheating of the engine", "false" ] }, { "ans": [ "High-altitude operations", "false" ] } ] }, { "ch": "What class of fires is water used for as a fire extinguishing agent?", "ansGr": [ { "ans": [ "Class A", "true" ] }, { "ans": [ "Class B", "false" ] }, { "ans": [ "Class C", "false" ] } ] }, { "ch": "What type of gas be released when pneumatic detector heated ?", "ansGr": [ { "ans": [ "Hydrogen gas", "true" ] }, { "ans": [ "Nitrogen gas.", "false" ] }, { "ans": [ "Helium gas", "false" ] } ] }, { "ch": "What is the minimum requirement for fire extinguishers in the pilot compartment?", "ansGr": [ { "ans": [ "One handheld extinguisher within easy reach", "true" ] }, { "ans": [ "Two extinguishers mounted on the ceiling", "false" ] }, { "ans": [ "One extinguisher in the cargo bay", "false" ] } ] }, { "ch": "What type of fire extinguisher is commonly used for electrical and flammable liquid fires?", "ansGr": [ { "ans": [ "Halon 1211", "true" ] }, { "ans": [ "Water", "false" ] }, { "ans": [ "CO₂", "false" ] } ] }, { "ch": "Why are dry chemical extinguishers NOT suitable for cockpit use?", "ansGr": [ { "ans": [ "They can cause corrosion and visual obscuration", "true" ] }, { "ans": [ "They are too heavy to carry on board", "false" ] }, { "ans": [ "They are ineffective on electrical fires", "false" ] } ] }, { "ch": "What is a key design requirement for extinguishers used in personnel compartments?", "ansGr": [ { "ans": [ "Minimize hazard of toxic gas concentrations", "true" ] }, { "ans": [ "Maximize discharge pressure", "false" ] }, { "ans": [ "Include CO₂ as extinguishing agent", "false" ] } ] }, { "ch": "Which fire extinguisher types are unsuitable for cockpit use due to corrosion and visibility issues?", "ansGr": [ { "ans": [ "Dry chemicals", "true" ] }, { "ans": [ "Halon 1211", "false" ] }, { "ans": [ "Water", "false" ] } ] }, { "ch": "What type of fire extinguisher is suitable for non-electrical fires in transport aircraft?", "ansGr": [ { "ans": [ "Water", "true" ] }, { "ans": [ "Halon 1211", "false" ] }, { "ans": [ "CO₂", "false" ] } ] }, { "part": "M13.13 ATA 28 - 47", "ch": "What is the main purpose of an aircraft fuel system?", "ansGr": [ { "ans": [ "To provide an uninterrupted flow of contaminant-free fuel.", "true" ] }, { "ans": [ "To store backup fuel only.", "false" ] }, { "ans": [ "To monitor the engine temperature.", "false" ] } ] }, { "ch": "What must every fuel system be designed to prevent?", "ansGr": [ { "ans": [ "The introduction of air into the fuel system.", "true" ] }, { "ans": [ "The mixing of oil with fuel.", "false" ] }, { "ans": [ "The overconsumption of fuel.", "false" ] } ] }, { "ch": "What is required in a multi-engine airplane fuel system?", "ansGr": [ { "ans": [ "Independent tank outlets for each engine.", "true" ] }, { "ans": [ "A single fuel pump for all engines.", "false" ] }, { "ans": [ "No need for fuel shutoff valves.", "false" ] } ] }, { "ch": "What is the purpose of a fuel flowmeter in an aircraft?", "ansGr": [ { "ans": [ "To monitor the rate and pressure of fuel supplied to the engine.", "true" ] }, { "ans": [ "To check the fuel temperature.", "false" ] }, { "ans": [ "To adjust the speed of the aircraft.", "false" ] } ] }, { "ch": "What must each fuel tank be able to withstand?", "ansGr": [ { "ans": [ "Vibration, inertia, fluid, and structural loads.", "true" ] }, { "ans": [ "Extreme heat without melting.", "false" ] }, { "ans": [ "Sudden air pressure changes.", "false" ] } ] }, { "ch": "How much expansion space must a fuel tank have?", "ansGr": [ { "ans": [ "Not less than two percent of the tank capacity.", "true" ] }, { "ans": [ "Exactly one percent of the tank capacity.", "false" ] }, { "ans": [ "More than ten percent of the tank capacity.", "false" ] } ] }, { "ch": "What is the purpose of a pressure fueling system on large aircraft?", "ansGr": [ { "ans": [ "To prevent fuel from escaping if the fuel entry valve fails.", "true" ] }, { "ans": [ "To reduce the weight of the aircraft.", "false" ] }, { "ans": [ "To measure the temperature of the fuel.", "false" ] } ] }, { "ch": "What are emergency fuel pumps designed to do?", "ansGr": [ { "ans": [ "Supply fuel to the engine if the main pump fails.", "true" ] }, { "ans": [ "Monitor the engine’s speed.", "false" ] }, { "ans": [ "Check the fuel for contaminants.", "false" ] } ] }, { "ch": "What do aircraft fuel lines need to be able to withstand?", "ansGr": [ { "ans": [ "Fuel pressure and accelerated flight conditions.", "true" ] }, { "ans": [ "Extreme heat and sudden temperature drops.", "false" ] }, { "ans": [ "Engine exhaust gases.", "false" ] } ] }, { "ch": "What is the role of fuel transfer systems in aircraft?", "ansGr": [ { "ans": [ "To move fuel from one tank to another.", "true" ] }, { "ans": [ "To monitor the fuel level.", "false" ] }, { "ans": [ "To measure fuel temperature.", "false" ] } ] }, { "ch": "What must an aircraft fuel system ensure during any likely operating condition?", "ansGr": [ { "ans": [ "Proper fuel flow at a rate and pressure for engine and APU operation.", "true" ] }, { "ans": [ "Increased engine thrust.", "false" ] }, { "ans": [ "Minimized fuel consumption.", "false" ] } ] }, { "ch": "What is the function of independent tank outlets in a multi-engine airplane?", "ansGr": [ { "ans": [ "To provide fuel to each engine separately.", "true" ] }, { "ans": [ "To allow both engines to use the same fuel tank.", "false" ] }, { "ans": [ "To increase fuel flow rate.", "false" ] } ] }, { "ch": "What tests must be performed to demonstrate proper fuel flow?", "ansGr": [ { "ans": [ "Flow tests at the most critical aircraft attitude.", "true" ] }, { "ans": [ "Ground engine tests at idle speed.", "false" ] }, { "ans": [ "High-altitude performance tests.", "false" ] } ] }, { "ch": "How does the fuel system prevent vapor lock during hot weather operations?", "ansGr": [ { "ans": [ "By ensuring the system is free from vapor lock at critical temperatures.", "true" ] }, { "ans": [ "By cooling the fuel tanks.", "false" ] }, { "ans": [ "By using higher fuel pressure.", "false" ] } ] }, { "ch": "Why is fuel tank expansion space required?", "ansGr": [ { "ans": [ "To allow for fuel expansion without overfilling the tank.", "true" ] }, { "ans": [ "To store additional emergency fuel.", "false" ] }, { "ans": [ "To reduce fuel vapor pressure.", "false" ] } ] }, { "ch": "What must be included in the design of a pressure fueling system to prevent fuel leaks?", "ansGr": [ { "ans": [ "A means to prevent hazardous quantities of fuel from escaping.", "true" ] }, { "ans": [ "A system for increasing fuel flow pressure.", "false" ] }, { "ans": [ "A mechanism for reducing fuel tank capacity.", "false" ] } ] }, { "ch": "What is the purpose of an emergency fuel pump in an aircraft?", "ansGr": [ { "ans": [ "To supply fuel in case of main pump failure.", "true" ] }, { "ans": [ "To increase fuel efficiency.", "false" ] }, { "ans": [ "To store excess fuel.", "false" ] } ] }, { "ch": "What must fuel lines be able to withstand in an aircraft?", "ansGr": [ { "ans": [ "Vibration and loads from fuel pressure and flight conditions.", "true" ] }, { "ans": [ "Extremely high temperatures.", "false" ] }, { "ans": [ "Constant fuel freezing conditions.", "false" ] } ] }, { "ch": "How does the fuel transfer system move fuel between tanks in an aircraft?", "ansGr": [ { "ans": [ "By using fuel boost pumps to transfer fuel into a manifold and then into the desired tank.", "true" ] }, { "ans": [ "By manually switching between tanks.", "false" ] }, { "ans": [ "By gravity alone.", "false" ] } ] }, { "ch": "How does the fuel system in an aircraft ensure uninterrupted fuel flow during all flight conditions?", "ansGr": [ { "ans": [ "By being designed and arranged to provide the correct flow rate and pressure regardless of the aircraft's attitude.", "true" ] }, { "ans": [ "By using multiple fuel tanks that operate independently.", "false" ] }, { "ans": [ "By increasing engine performance during takeoff.", "false" ] } ] }, { "ch": "In what ways do fuel tanks need to be designed to handle varying fuel loads and shifts in weight during flight maneuvers?", "ansGr": [ { "ans": [ "The airframe must be strong enough to handle the weight shifts and not negatively affect control of the aircraft.", "true" ] }, { "ans": [ "The fuel tanks should be located in the center of the aircraft.", "false" ] }, { "ans": [ "The fuel tanks must have extra fuel to compensate for weight shifts.", "false" ] } ] }, { "ch": "What safety measures must be in place to prevent a single fuel pump from drawing fuel from multiple tanks?", "ansGr": [ { "ans": [ "The fuel system must include a mechanism to prevent air from entering the system and control fuel distribution.", "true" ] }, { "ans": [ "Each tank must have an individual pump.", "false" ] }, { "ans": [ "The fuel tanks must be placed far apart from each other.", "false" ] } ] }, { "ch": "How do independent tank outlets ensure engine safety in a multi-engine aircraft using a single fuel tank?", "ansGr": [ { "ans": [ "By providing separate fuel supply lines for each engine, reducing the risk of losing power to more than one engine.", "true" ] }, { "ans": [ "By allowing the pilot to manually switch between tanks.", "false" ] }, { "ans": [ "By controlling the flow of fuel based on engine speed.", "false" ] } ] }, { "ch": "How does the fuel system in an aircraft maintain fuel flow during hot weather conditions?", "ansGr": [ { "ans": [ "By preventing vapor lock through proper design and fuel flow testing at critical temperatures.", "true" ] }, { "ans": [ "By cooling the fuel tanks during flight.", "false" ] }, { "ans": [ "By increasing fuel pressure to prevent evaporation.", "false" ] } ] }, { "ch": "What must be done to ensure fuel tanks remain operational during the entire flight spectrum?", "ansGr": [ { "ans": [ "The tanks must be strong enough to handle vibration, inertia, fluid, and structural loads without failure.", "true" ] }, { "ans": [ "The tanks must be filled with only a specific type of fuel.", "false" ] }, { "ans": [ "The tanks should be manually checked before every flight.", "false" ] } ] }, { "ch": "How do automatic shutoff systems prevent tank overfilling during pressure fueling?", "ansGr": [ { "ans": [ "By automatically closing the fuel entry valve when the maximum fuel level is reached.", "true" ] }, { "ans": [ "By allowing fuel to bypass the filter.", "false" ] }, { "ans": [ "By increasing the flow of fuel during refueling.", "false" ] } ] }, { "ch": "How are fuel pumps in an aircraft fuel system designed to operate safely without affecting engine performance?", "ansGr": [ { "ans": [ "By preventing fuel flow disruptions regardless of the engine power setting.", "true" ] }, { "ans": [ "By switching automatically between main and auxiliary pumps during flight.", "false" ] }, { "ans": [ "By reducing fuel flow during descent.", "false" ] } ] }, { "ch": "Why are fuel pumps required to have independent power supplies?", "ansGr": [ { "ans": [ "To ensure the emergency pump remains operational if the main pump fails.", "true" ] }, { "ans": [ "To increase the speed of fuel transfer.", "false" ] }, { "ans": [ "To provide backup power for the cockpit instruments.", "false" ] } ] }, { "ch": "How does a fuel transfer system prevent fuel from overfilling other tanks during in-flight fuel transfer?", "ansGr": [ { "ans": [ "By using dedicated fuel transfer pumps and a check valve system.", "true" ] }, { "ans": [ "By manually switching the valves between tanks.", "false" ] }, { "ans": [ "By reducing fuel pressure during transfer.", "false" ] } ] }, { "ch": "What are the safety precautions that must be taken when fueling or defueling an aircraft?", "ansGr": [ { "ans": [ "Fueling must be done outside to prevent the accumulation of fuel vapors, and static electricity must be controlled.", "true" ] }, { "ans": [ "Fueling should be done in a hangar to minimize exposure to weather conditions.", "false" ] }, { "ans": [ "Fuel tanks must be cooled before fueling to prevent combustion.", "false" ] } ] }, { "ch": "Why is it necessary to follow a prescribed sequence when fueling or defueling an aircraft?", "ansGr": [ { "ans": [ "To prevent structural damage to the airframe.", "true" ] }, { "ans": [ "To increase the fuel flow rate during fueling.", "false" ] }, { "ans": [ "To prevent air from entering the fuel tanks.", "false" ] } ] }, { "ch": "What should you do to move some fuel from this tank to others tanks?", "ansGr": [ { "ans": [ "Transfer", "true" ] }, { "ans": [ "Refuelling", "false" ] }, { "ans": [ "Defueling", "false" ] } ] }, { "ch": "Which component has to open during transfer fuel?", "ansGr": [ { "ans": [ "The cross feed valve", "true" ] }, { "ans": [ "The float valve", "false" ] }, { "ans": [ "The dumping valve", "false" ] } ] }, { "ch": "Which component to force fuel from this tank to others tanks?", "ansGr": [ { "ans": [ "The boost pump", "true" ] }, { "ans": [ "High air pressure", "false" ] }, { "ans": [ "Vacuum pump", "false" ] } ] }, { "ch": "What is the heart of the fuel supply system?", "ansGr": [ { "ans": [ "The fuel feed system", "true" ] }, { "ans": [ "The fuel balancing system", "false" ] }, { "ans": [ "The fuel heating system", "false" ] } ] }, { "ch": "What is purpose of the cross feed valve?", "ansGr": [ { "ans": [ "It transfers fuel from this tank to other tank.", "true" ] }, { "ans": [ "It prevents the fuel leak", "false" ] }, { "ans": [ "It supplies fuel from main tank to APU", "false" ] } ] }, { "ch": "Which component allows fuel flows from fuel line or fuel manifold to the desired tank?", "ansGr": [ { "ans": [ "The refuel valves", "true" ] }, { "ans": [ "The cross feed valve", "false" ] }, { "ans": [ "The shut off valve", "false" ] } ] }, { "ch": "Where is the commom location of the fueling station?", "ansGr": [ { "ans": [ "At the leading edge wing", "true" ] }, { "ans": [ "At the wing tip area", "false" ] }, { "ans": [ "At the main landing gear area", "false" ] } ] }, { "ch": "How prevent overfill during refueling?", "ansGr": [ { "ans": [ "Closed the refuel valve by variuos automatic shutoff system", "true" ] }, { "ans": [ "By stop the fuel pump truck", "false" ] }, { "ans": [ "Monitoring the fuel overflow via over flow port by mechanic", "false" ] } ] }, { "ch": "Where is the location to perform defueling?", "ansGr": [ { "ans": [ "The same refueling station", "true" ] }, { "ans": [ "Next the refueling station", "false" ] }, { "ans": [ "In the nose landing gear bay", "false" ] } ] }, { "ch": "Which valve be openned during defueling?", "ansGr": [ { "ans": [ "The defuel valve", "true" ] }, { "ans": [ "The refuel valve", "false" ] }, { "ans": [ "The cross feed valve", "false" ] } ] }, { "ch": "How can pump fuel out of the aircraft during defuelling?", "ansGr": [ { "ans": [ "By the boost pump", "true" ] }, { "ans": [ "By the pneumatic pressure", "false" ] }, { "ans": [ "By gravity", "false" ] } ] }, { "ch": "Where is the location for over the wing refueling?", "ansGr": [ { "ans": [ "The fuel tank cap on the upper surface of the wing", "true" ] }, { "ans": [ "The same refueling station", "false" ] }, { "ans": [ "The fuel tank cap on the cargo compartment", "false" ] } ] }, { "ch": "Which component is equipped with the fuel nozzle?", "ansGr": [ { "ans": [ "The static bonding wires", "true" ] }, { "ans": [ "The high air pressure hose", "false" ] }, { "ans": [ "The over pressure valve", "false" ] } ] }, { "ch": "Where can park the aircraft during defueling?", "ansGr": [ { "ans": [ "At outside of the hangar", "true" ] }, { "ans": [ "In the hangar", "false" ] }, { "ans": [ "Any where", "false" ] } ] }, { "ch": "Who can perform defueling?", "ansGr": [ { "ans": [ "The authorized staff", "true" ] }, { "ans": [ "The fuel agent's staff", "false" ] }, { "ans": [ "Any one", "false" ] } ] }, { "ch": "How can fuel contamination control be maintained throughout the aviation industry?", "ansGr": [ { "ans": [ "Routine inspections, testing, and monitoring ensure clean fuel.", "true" ] }, { "ans": [ "Contamination control only applies to long-haul aircraft.", "false" ] }, { "ans": [ "Fuel system inspections are only necessary during overhauls.", "false" ] } ] }, { "ch": "What kind of fuel filter is commonly used on turbine-powered aircraft?", "ansGr": [ { "ans": [ "Micronic filters.", "true" ] }, { "ans": [ "Water filters.", "false" ] }, { "ans": [ "Gas filters.", "false" ] } ] }, { "ch": "What is the purpose of a fuel temperature gauge?", "ansGr": [ { "ans": [ "To monitor fuel temperature, especially at high altitudes.", "true" ] }, { "ans": [ "To measure fuel pressure.", "false" ] }, { "ans": [ "To show how much fuel is left in the tank.", "false" ] } ] }, { "ch": "What do fuel heaters help prevent in turbine-powered aircraft?", "ansGr": [ { "ans": [ "Ice formation in the fuel system.", "true" ] }, { "ans": [ "Overheating of the fuel.", "false" ] }, { "ans": [ "Air leaks in the fuel lines.", "false" ] } ] }, { "ch": "How is fuel quantity indicated in modern aircraft?", "ansGr": [ { "ans": [ "Using digital displays.", "true" ] }, { "ans": [ "By measuring air pressure.", "false" ] }, { "ans": [ "Using thermometers.", "false" ] } ] }, { "ch": "How does lightning protection in a fuel system prevent fuel vapor ignition?", "ansGr": [ { "ans": [ "By preventing direct lightning strikes or swept strokes from igniting fuel vapor.", "true" ] }, { "ans": [ "By using non-conductive materials.", "false" ] }, { "ans": [ "By reducing fuel flow during storms.", "false" ] } ] }, { "ch": "How do cross-feed valves assist in fuel management?", "ansGr": [ { "ans": [ "By allowing fuel from any tank to feed any engine.", "true" ] }, { "ans": [ "By increasing fuel flow to the nearest engine.", "false" ] }, { "ans": [ "By preventing fuel from flowing to the wrong engine.", "false" ] } ] }, { "ch": "How does a fuel filter bypass system work during fuel system operation?", "ansGr": [ { "ans": [ "It allows fuel to flow around a clogged filter.", "true" ] }, { "ans": [ "It shuts down the engine during fuel filter malfunctions.", "false" ] }, { "ans": [ "It increases fuel pressure to clean the filter.", "false" ] } ] }, { "ch": "How does a capacitance fuel quantity indicator work in an aircraft?", "ansGr": [ { "ans": [ "By measuring changes in capacitance in the tank due to fuel levels.", "true" ] }, { "ans": [ "By using mechanical floats to indicate fuel quantity.", "false" ] }, { "ans": [ "By measuring the temperature of the fuel.", "false" ] } ] }, { "ch": "What is the purpose of a compensator unit in a capacitance fuel quantity system?", "ansGr": [ { "ans": [ "To adjust for temperature variations in the fuel.", "true" ] }, { "ans": [ "To increase the fuel tank’s capacity.", "false" ] }, { "ans": [ "To control fuel flow during refueling.", "false" ] } ] }, { "ch": "Why are boost pumps used during high altitude flights?", "ansGr": [ { "ans": [ "To prevent vapor lock.", "true" ] }, { "ans": [ "To increase engine performance.", "false" ] }, { "ans": [ "To reduce fuel consumption.", "false" ] } ] }, { "ch": "What is the main function of fuel flowmeters in turbine-powered aircraft?", "ansGr": [ { "ans": [ "To measure fuel mass and ensure accurate fuel flow information.", "true" ] }, { "ans": [ "To increase engine efficiency.", "false" ] }, { "ans": [ "To reduce fuel temperature.", "false" ] } ] }, { "ch": "How does a digital fuel flowmeter improve accuracy?", "ansGr": [ { "ans": [ "By integrating temperature and compensating factors.", "true" ] }, { "ans": [ "By increasing fuel flow pressure.", "false" ] }, { "ans": [ "By measuring only the fuel quantity.", "false" ] } ] }, { "ch": "How do thermal dispersion sensors measure fuel flow in modern aircraft?", "ansGr": [ { "ans": [ "By measuring the cooling effect of fuel on heated elements.", "true" ] }, { "ans": [ "By using mechanical floats.", "false" ] }, { "ans": [ "By measuring the air pressure in the fuel lines.", "false" ] } ] }, { "ch": "How do fuel heaters prevent ice formation in turbine-powered aircraft?", "ansGr": [ { "ans": [ "By using warm air or oil to heat the fuel.", "true" ] }, { "ans": [ "By increasing the fuel pressure.", "false" ] }, { "ans": [ "By reducing the temperature in the fuel tanks.", "false" ] } ] }, { "ch": "What is the main purpose of fuel pressure gauges in an aircraft?", "ansGr": [ { "ans": [ "To monitor fuel pressure and detect system malfunctions.", "true" ] }, { "ans": [ "To control fuel flow to the engines.", "false" ] }, { "ans": [ "To increase engine performance during takeoff.", "false" ] } ] }, { "ch": "What do valve-in-transit lights indicate to the flight crew?", "ansGr": [ { "ans": [ "When a fuel valve is opening or closing.", "true" ] }, { "ans": [ "When fuel is leaking from the tank.", "false" ] }, { "ans": [ "When fuel is flowing to the engine.", "false" ] } ] }, { "ch": "Why is lightning protection critical in the design of an aircraft's fuel system?", "ansGr": [ { "ans": [ "To prevent the ignition of fuel vapor due to lightning strikes or electrical discharge.", "true" ] }, { "ans": [ "To increase the efficiency of the fuel system during storms.", "false" ] }, { "ans": [ "To reduce the chances of fuel tank overfilling.", "false" ] } ] }, { "ch": "How do cross-feed valves improve fuel management in jet transport aircraft?", "ansGr": [ { "ans": [ "By allowing fuel from any tank to feed any engine through the cross-feed manifold.", "true" ] }, { "ans": [ "By increasing the pressure of fuel flow to the engines.", "false" ] }, { "ans": [ "By shutting off fuel flow during a malfunction.", "false" ] } ] }, { "ch": "How do capacitance fuel quantity systems maintain accurate fuel measurements despite the aircraft’s attitude?", "ansGr": [ { "ans": [ "By using multiple fuel probes to measure fuel levels in various parts of the tank.", "true" ] }, { "ans": [ "By adjusting the fuel pressure to compensate for attitude changes.", "false" ] }, { "ans": [ "By reducing fuel flow in critical situations.", "false" ] } ] }, { "ch": "Why is temperature compensation necessary in a capacitance fuel quantity system?", "ansGr": [ { "ans": [ "To account for changes in the dielectric constant of the fuel as the temperature varies.", "true" ] }, { "ans": [ "To adjust the fuel quantity reading based on the altitude of the aircraft.", "false" ] }, { "ans": [ "To increase the fuel quantity accuracy during descent.", "false" ] } ] }, { "ch": "How does a compensator unit in a capacitance fuel quantity system adjust for temperature changes in fuel?", "ansGr": [ { "ans": [ "By modifying current flow to reflect changes in fuel density.", "true" ] }, { "ans": [ "By reducing the number of fuel probes required.", "false" ] }, { "ans": [ "By controlling the fuel flow based on pressure variations.", "false" ] } ] }, { "ch": "How does a fuel flowmeter in a turbine-powered aircraft measure fuel mass accurately?", "ansGr": [ { "ans": [ "By measuring the viscosity of the fuel and its deflection of a turbine.", "true" ] }, { "ans": [ "By using mechanical floats to measure fuel quantity.", "false" ] }, { "ans": [ "By adjusting fuel pressure based on engine speed.", "false" ] } ] }, { "ch": "How does thermal dispersion technology improve fuel flow measurement in modern aircraft?", "ansGr": [ { "ans": [ "By using heated elements to measure the cooling effect of the fuel.", "true" ] }, { "ans": [ "By increasing the accuracy of fuel quantity readings.", "false" ] }, { "ans": [ "By measuring the temperature of the fuel directly.", "false" ] } ] }, { "ch": "Why are fuel heaters critical in preventing ice formation in the fuel system of turbine-powered aircraft?", "ansGr": [ { "ans": [ "They warm the fuel to prevent ice formation and ensure proper fuel flow.", "true" ] }, { "ans": [ "They increase fuel pressure to prevent freezing.", "false" ] }, { "ans": [ "They reduce the temperature in the tanks to prevent condensation.", "false" ] } ] }, { "ch": "How do fuel heaters protect against fuel system failure at high altitudes?", "ansGr": [ { "ans": [ "By using compressor bleed air or hot engine oil to heat the fuel and melt ice crystals.", "true" ] }, { "ans": [ "By cooling the fuel to reduce vapor pressure.", "false" ] }, { "ans": [ "By increasing the flow rate of the fuel to prevent blockages.", "false" ] } ] }, { "ch": "How do oil/fuel exchangers (FCOC) serve a dual function in fuel systems?", "ansGr": [ { "ans": [ "They heat the fuel and cool the engine oil.", "true" ] }, { "ans": [ "They increase fuel pressure and decrease fuel temperature.", "false" ] }, { "ans": [ "They reduce fuel consumption and increase engine power.", "false" ] } ] }, { "ch": "Why are fuel temperature gauges important during high-altitude flights?", "ansGr": [ { "ans": [ "They help prevent ice formation in the fuel system by monitoring fuel temperature.", "true" ] }, { "ans": [ "They control the flow rate of the fuel to each engine.", "false" ] }, { "ans": [ "They adjust fuel pressure to increase engine performance.", "false" ] } ] }, { "ch": "How do pressure warning signals in fuel systems help pilots manage fuel system malfunctions?", "ansGr": [ { "ans": [ "By alerting them when fuel pressure falls outside the normal operating range.", "true" ] }, { "ans": [ "By controlling the fuel flow to the engines.", "false" ] }, { "ans": [ "By shutting off the fuel pumps automatically.", "false" ] } ] }, { "ch": "How do valve-in-transit lights help the flight crew monitor fuel valve operation?", "ansGr": [ { "ans": [ "By indicating when a valve is opening or closing in the fuel system.", "true" ] }, { "ans": [ "By displaying the amount of fuel flowing through the valve.", "false" ] }, { "ans": [ "By reducing fuel flow when a valve is stuck.", "false" ] } ] }, { "ch": "What role does the fuel totalizer play in monitoring fuel usage in high-performance aircraft?", "ansGr": [ { "ans": [ "It calculates and displays information like total fuel used, fuel remaining, and total range.", "true" ] }, { "ans": [ "It increases the accuracy of fuel pressure readings.", "false" ] }, { "ans": [ "It reduces fuel consumption by adjusting engine performance.", "false" ] } ] }, { "ch": "How does a mass fuel flowmeter in a turbine engine aircraft measure fuel flow?", "ansGr": [ { "ans": [ "By measuring fuel viscosity and deflection of a turbine in the fuel stream.", "true" ] }, { "ans": [ "By using mechanical floats to indicate fuel levels.", "false" ] }, { "ans": [ "By adjusting the fuel pressure based on altitude.", "false" ] } ] }, { "ch": "How do surge tanks prevent fuel system damage in aircraft with integral fuel tanks?", "ansGr": [ { "ans": [ "By acting as overflow tanks and venting systems to prevent fuel overfilling.", "true" ] }, { "ans": [ "By reducing fuel pressure during high-altitude flights.", "false" ] }, { "ans": [ "By increasing the fuel flow rate during takeoff.", "false" ] } ] }, { "ch": "How do fuel strainers and micronic filters contribute to safe fuel system operation?", "ansGr": [ { "ans": [ "By removing debris and fine particles from the fuel before it reaches the engine.", "true" ] }, { "ans": [ "By increasing the flow rate of the fuel to the engine.", "false" ] }, { "ans": [ "By reducing fuel pressure during high-speed flights.", "false" ] } ] }, { "ch": "What safety measures must be followed when performing maintenance on an integral fuel tank?", "ansGr": [ { "ans": [ "The fuel tank must be emptied and purged of vapors, and respiratory equipment must be used.", "true" ] }, { "ans": [ "The fuel tank must be cooled to prevent condensation.", "false" ] }, { "ans": [ "The fuel tank must be filled with inert gas to prevent combustion.", "false" ] } ] }, { "ch": "How does a built-in thermostatic device in a fuel heater control the flow of hot air or oil?", "ansGr": [ { "ans": [ "By automatically opening or closing a valve based on fuel temperature.", "true" ] }, { "ans": [ "By adjusting the fuel flow to the engine based on altitude.", "false" ] }, { "ans": [ "By increasing the pressure in the fuel lines.", "false" ] } ] }, { "ch": "Why is it important to electrically bond and ground metal fuel lines in an aircraft?", "ansGr": [ { "ans": [ "To prevent static electricity buildup and discharge that could ignite fuel vapors.", "true" ] }, { "ans": [ "To reduce fuel consumption during high-altitude flights.", "false" ] }, { "ans": [ "To increase the strength of the fuel lines.", "false" ] } ] }, { "ch": "How do manually-operated gate valves help control fuel flow in an aircraft's fuel system?", "ansGr": [ { "ans": [ "By shutting off fuel flow without requiring electrical power.", "true" ] }, { "ans": [ "By increasing fuel flow during takeoff.", "false" ] }, { "ans": [ "By reducing engine performance during descent.", "false" ] } ] }, { "ch": "What is the primary purpose of motor-operated valves in a large aircraft's fuel system?", "ansGr": [ { "ans": [ "To remotely control fuel flow from the cockpit.", "true" ] }, { "ans": [ "To increase the speed of fuel flow during flight.", "false" ] }, { "ans": [ "To reduce fuel consumption during cruise.", "false" ] } ] }, { "ch": "How does a solenoid-operated valve function in an aircraft fuel system?", "ansGr": [ { "ans": [ "By using an electric solenoid to open or close a fuel valve remotely.", "true" ] }, { "ans": [ "By increasing fuel pressure during high-speed maneuvers.", "false" ] }, { "ans": [ "By reducing fuel flow during descent.", "false" ] } ] }, { "ch": "How does the use of digital fuel quantity indicators improve fuel management in aircraft?", "ansGr": [ { "ans": [ "By converting variable resistance signals from tank units into digital displays for better accuracy.", "true" ] }, { "ans": [ "By increasing fuel flow to the engine.", "false" ] }, { "ans": [ "By reducing the amount of unusable fuel in the tanks.", "false" ] } ] }, { "ch": "Why do some aircraft have fuel jettisoning systems?", "ansGr": [ { "ans": [ "To reduce the aircraft’s weight for landing.", "true" ] }, { "ans": [ "To lower fuel consumption during flight.", "false" ] }, { "ans": [ "To cool down the engine during overheating.", "false" ] } ] }, { "ch": "How do venting systems prevent structural damage in aircraft fuel tanks?", "ansGr": [ { "ans": [ "By ensuring fuel is vented regardless of the aircraft’s attitude.", "true" ] }, { "ans": [ "By reducing the temperature inside the tanks.", "false" ] }, { "ans": [ "By using sealed vent tubes.", "false" ] } ] }, { "ch": "What role does a fuel dump system play during an emergency landing?", "ansGr": [ { "ans": [ "It allows the crew to reduce the aircraft's weight by jettisoning excess fuel.", "true" ] }, { "ans": [ "It reduces the chances of a fuel leak.", "false" ] }, { "ans": [ "It shuts down the engines to prevent fire.", "false" ] } ] }, { "ch": "How do fuel jettison systems prevent hazardous conditions during emergency landings?", "ansGr": [ { "ans": [ "By allowing the crew to safely reduce the aircraft's weight by jettisoning excess fuel.", "true" ] }, { "ans": [ "By shutting down the engines to prevent overheating.", "false" ] }, { "ans": [ "By automatically sealing the fuel tanks during descent.", "false" ] } ] }, { "ch": "What is the purpose of fuel dumping systems in aircraft?", "ansGr": [ { "ans": [ "To reduce the aircraft’s weight before landing", "true" ] }, { "ans": [ "To increase fuel efficiency", "false" ] }, { "ans": [ "To transfer fuel between tanks", "false" ] } ] }, { "ch": "Why is it important to prevent unsymmetrical fuel jettisoning, and how do aircraft systems achieve this?", "ansGr": [ { "ans": [ "Systems prevent hazardous conditions by balancing fuel discharge.", "true" ] }, { "ans": [ "Only large aircraft require symmetrical jettisoning.", "false" ] }, { "ans": [ "Jettison systems operate automatically without pilot input.", "false" ] } ] }, { "ch": "How does the center of gravity control system (CGCC) maintain longitudinal balance during flight?", "ansGr": [ { "ans": [ "By transferring fuel between tanks to maintain the desired center of gravity.", "true" ] }, { "ans": [ "By adjusting engine thrust to counter the shifting center of gravity.", "false" ] }, { "ans": [ "By reducing fuel consumption in the forward tanks.", "false" ] } ] }, { "ch": "How does the computerized center of gravity control system (CGCC) monitor fuel transfer during flight?", "ansGr": [ { "ans": [ "By using inputs from the fuel management system and tank volumes to calculate and perform transfers automatically.", "true" ] }, { "ans": [ "By allowing the flight crew to manually switch between tanks.", "false" ] }, { "ans": [ "By increasing engine thrust during critical phases of flight.", "false" ] } ] }, { "ch": "How can show up the CG value in or out of limit?", "ansGr": [ { "ans": [ "By a range of the percentage of the mean aerodynamic chord (MAC).", "true" ] }, { "ans": [ "By a exact point in the mean aerodynamic chord (MAC).", "false" ] }, { "ans": [ "By a range of the percentage of the center line of the wing's profile.", "false" ] } ] } ]