[ { "part": "M11.4 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 isthe 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": "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": "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": "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 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 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": "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 interchangeable 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": "What is the function of drain valve in the evaporator?", "ansGr": [ { "ans": [ "It drains the water condensed.", "true" ] }, { "ans": [ "It drains the refrigerant leaked.", "false" ] }, { "ans": [ "It collects the ice frozen.", "false" ] } ] }, { "ch": "Which type of pump is used in the vapor cycle air conditioning compressor?", "ansGr": [ { "ans": [ "Piston pump.", "true" ] }, { "ans": [ "Centrifugal pump.", "false" ] }, { "ans": [ "Gear pump.", "false" ] } ] }, { "ch": "Which position of the service valve is for servicing?", "ansGr": [ { "ans": [ "Intermediate position.", "true" ] }, { "ans": [ "Front seated.", "false" ] }, { "ans": [ "Back seated.", "false" ] } ] }, { "ch": "Which position of the service valve is for maintenance or replacing?", "ansGr": [ { "ans": [ "Front seated.", "true" ] }, { "ans": [ "Back seated.", "false" ] }, { "ans": [ "Intermediate position.", "false" ] } ] }, { "ch": "Which position of the service valve is for normal operation?", "ansGr": [ { "ans": [ "Back seated.", "true" ] }, { "ans": [ "Intermediate position.", "false" ] }, { "ans": [ "Front seated.", "false" ] } ] }, { "ch": "Which valve on 30 pound R134a refrigerent container is used for the low side of the vaporcycle system?", "ansGr": [ { "ans": [ "The blue valve.", "true" ] }, { "ans": [ "The red valve.", "false" ] }, { "ans": [ "The yellow valve.", "false" ] } ] }, { "ch": "Which valve on 30 pound R134a refrigerent container is used for the high side of the vaporcycle system?", "ansGr": [ { "ans": [ "The red valve.", "true" ] }, { "ans": [ "The yellow valve.", "false" ] }, { "ans": [ "The blue valve.", "false" ] } ] }, { "ch": "Which part of the 30 pound R134a refrigerant container is used to connect to the low side of the vaporcycle system?", "ansGr": [ { "ans": [ "Upper part.", "true" ] }, { "ans": [ "Bottom part", "false" ] }, { "ans": [ "Middle part.", "false" ] } ] }, { "ch": "Which part of the 30 pound R134a refrigerant container is used to connect to the high side of the vaporcycle system?", "ansGr": [ { "ans": [ "Bottom part", "true" ] }, { "ans": [ "Middle part.", "false" ] }, { "ans": [ "Upper part.", "false" ] } ] }, { "ch": "When the temperature is lower, the amount of vacuum that is needed to remove water in the vapor cycle system is:", "ansGr": [ { "ans": [ "More.", "true" ] }, { "ans": [ "Less.", "false" ] }, { "ans": [ "Not change.", "false" ] } ] }, { "ch": "When is the charging a vapor cycle system perform?", "ansGr": [ { "ans": [ "After evacuation.", "true" ] }, { "ans": [ "Before evacuation.", "false" ] }, { "ans": [ "At the same time with evacuation.", "false" ] } ] }, { "ch": "Which side of the vapor cycle system is released refrigerant first during charging?", "ansGr": [ { "ans": [ "The high side.", "true" ] }, { "ans": [ "The low side.", "false" ] }, { "ans": [ "The high or low side.", "false" ] } ] }, { "ch": "During evacuating the vapor cycle system, a vacuum pump is used to draw:", "ansGr": [ { "ans": [ "Water vapor from the system.", "true" ] }, { "ans": [ "Refrigerant vapor from the system.", "false" ] }, { "ans": [ "Refrigerant liquid from the system.", "false" ] } ], "ref": "B. " }, { "ch": "Vapor cycle system must be properly purged:", "ansGr": [ { "ans": [ "Before opening for maintenance.", "true" ] }, { "ans": [ "After opening for maintenance.", "false" ] }, { "ans": [ "During opening for maintenance.", "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": "M11.5 Instruments Avionic Systems", "ch": "How many basic kinds of instruments in the commercial airraft?", "ansGr": [ { "ans": [ "3", "true" ] }, { "ans": [ "2", "false" ] }, { "ans": [ "1", "false" ] } ] }, { "ch": "ECAM stand for?", "ansGr": [ { "ans": [ "Electronic Centralized Aircraft Monitoring", "true" ] }, { "ans": [ "Electronic Control Aircraft Monitoring", "false" ] }, { "ans": [ "Engine Centralized Aircraft Monitoring", "false" ] } ] }, { "ch": "What is an original analog flight instrument operated by?", "ansGr": [ { "ans": [ "By air pressure and the use of gyroscopes?", "true" ] }, { "ans": [ "By air pressure and the use of electricity?", "false" ] }, { "ans": [ "By air pressure and the use of accelemeters?", "false" ] } ] }, { "ch": "What is the main purpose of altimeter?", "ansGr": [ { "ans": [ "To display aircraft altitude", "true" ] }, { "ans": [ "To display aircraft attitude", "false" ] }, { "ans": [ "To display vertical speed", "false" ] } ] }, { "ch": "What components are retained in aircraft electrical systems for redundancy?", "ansGr": [ { "ans": [ "A pneumatic altimeter, a gyro artificial horizon, and a magnetic direction indicator", "true" ] }, { "ans": [ "A pneumatic altimeter, a gyro artificial horizon, an accelemeter", "false" ] }, { "ans": [ "A pneumatic altimeter, a gyro artificial horizon", "false" ] } ] }, { "ch": "In a classic \"T\" arrangement on older aircraft, what is put on the top center position directly in front of the pilot and copilot?", "ansGr": [ { "ans": [ "The artificial horizon", "true" ] }, { "ans": [ "The altimeter", "false" ] }, { "ans": [ "The airspeed indicator", "false" ] } ] }, { "ch": "What is the purpose of engine instruments?", "ansGr": [ { "ans": [ "To measure operation parameters of the aircraft's engine", "true" ] }, { "ans": [ "To measure air speed of the aircraft", "false" ] }, { "ans": [ "To display aircraft attitude", "false" ] } ] }, { "ch": "What is the postion of Engine instrumentation often located?", "ansGr": [ { "ans": [ "In the center of the cockpit", "true" ] }, { "ans": [ "In the left of the cockpit", "false" ] }, { "ans": [ "In the right of the cockpit", "false" ] } ] }, { "ch": "What is the main parameter of engine instruments?", "ansGr": [ { "ans": [ "Fuel/oil quantity, pressure, temperature indication and engine speed", "true" ] }, { "ans": [ "Fuel/oil quantity, pressure, temperature indication and aircraft altitude", "false" ] }, { "ans": [ "Fuel/oil quantity, pressure, temperature indication and air speed", "false" ] } ] }, { "ch": "What are the components of a traditional navigation instrument?", "ansGr": [ { "ans": [ "A clock and a magnetic compass", "true" ] }, { "ans": [ "A MEMS and a magnetic compass", "false" ] }, { "ans": [ "A gyroscopes and a clock", "false" ] } ] }, { "ch": "Some aircraft instruments incorporate the use of radio signals to define a specific course while flying the aircraft en route from one airport to another. They are categorized as", "ansGr": [ { "ans": [ "Navigation instruments", "true" ] }, { "ans": [ "Condition instruments", "false" ] }, { "ans": [ "Flight instruments", "false" ] } ] }, { "ch": "Which aircraft instruments are designed specifically to direct the pilot's approach to landing at an airport?", "ansGr": [ { "ans": [ "Navigation instruments", "true" ] }, { "ans": [ "Flight instruments", "false" ] }, { "ans": [ "Condition instruments", "false" ] } ] }, { "ch": "GPS technology is built into some aircraft instrument packages. What is the purpose of this?", "ansGr": [ { "ans": [ "For navigational purposes", "true" ] }, { "ans": [ "For entertainment purposes", "false" ] }, { "ans": [ "For rescue purposes", "false" ] } ] }, { "ch": "What are the basic sensing mechanisms employed in aircraft instruments for pressure measurement?", "ansGr": [ { "ans": [ "The diaphragm and bellows", "true" ] }, { "ans": [ "The diaphragm and aneroid", "false" ] }, { "ans": [ "The aneroid and bellows", "false" ] } ] }, { "ch": "What kind of the fundamental pressure sensing mechanisms are used in aircraft instrument systems?", "ansGr": [ { "ans": [ "Bourdon tube, the diaphragm or bellows, and the solid-state sensing device", "true" ] }, { "ans": [ "Bourdon tube, the diaphragm or bellows, transmitter senses", "false" ] }, { "ans": [ "The diaphragm or bellows, and the solid-state sensing device, transmitter senses", "false" ] } ] }, { "ch": "What is the purpose of fixed end of a Bourdon tube?", "ansGr": [ { "ans": [ "To attach pointer linkage", "true" ] }, { "ans": [ "For pressure entrance", "false" ] }, { "ans": [ "To regulate pressure", "false" ] } ] }, { "ch": "What are principle of Solid-state microtechnology pressure sensors?", "ansGr": [ { "ans": [ "The electrical output or resistance changes when pressure changes occur", "true" ] }, { "ans": [ "The electrical output or resistance no changes when pressure changes occur", "false" ] }, { "ans": [ "The electrical output or resistance changes when pressure no changes occur", "false" ] } ] }, { "ch": "What is the standard pressure value (a standard temperature of 15 ˚C at sea level?", "ansGr": [ { "ans": [ "29.92 inches of mercury (\"Hg), 1 013.2 hectopascal (hPa), or 14.7 psi", "true" ] }, { "ans": [ "2992 inches of mercury (\"Hg), 1 0132 hectopascal (hPa), or 147 psi", "false" ] }, { "ans": [ "299.2 inches of mercury (\"Hg), 1 01.32 hectopascal (hPa), or 147 psi", "false" ] } ] }, { "ch": "What the oil pressure is usually indicated?", "ansGr": [ { "ans": [ "PSI", "true" ] }, { "ans": [ "hPa", "false" ] }, { "ans": [ "Hg", "false" ] } ] }, { "ch": "EPR stand for?", "ansGr": [ { "ans": [ "Engine pressure ratio", "true" ] }, { "ans": [ "Exhaust pressure ratio", "false" ] }, { "ans": [ "Engine pressure regulation", "false" ] } ] }, { "ch": "What is the purpose of EPR gauge?", "ansGr": [ { "ans": [ "To presents an indication of the thrust being developed by the engine", "true" ] }, { "ans": [ "To presents an indication of Engine oil pressure", "false" ] }, { "ans": [ "To presents an indication of Engine fuel pressure", "false" ] } ] }, { "ch": "What components are used to monitor the vacuum developed in the system that actuates the air driven gyroscopic flight instrument?", "ansGr": [ { "ans": [ "Gyro pressure gauge, vacuum gauge, or suction gauge", "true" ] }, { "ans": [ "Low oil pressure indicator", "false" ] }, { "ans": [ "Vertical speed indicator", "false" ] } ] }, { "ch": "What are the most common pitot-static instruments?", "ansGr": [ { "ans": [ "The altimeter, airspeed indicator, and vertical speed indicator", "true" ] }, { "ans": [ "The altimeter, airspeed indicator, and attitude indicator", "false" ] }, { "ans": [ "The altimeter, airspeed indicator, and navigation indicator", "false" ] } ] }, { "ch": "How to prevent icing during flight in pitot-static tube?", "ansGr": [ { "ans": [ "By heating elements", "true" ] }, { "ans": [ "By vibration", "false" ] }, { "ans": [ "By chemical", "false" ] } ] }, { "ch": "What is the purpose of an alternate source of static air pressure?", "ansGr": [ { "ans": [ "For emergency use", "true" ] }, { "ans": [ "For normal indicating", "false" ] }, { "ans": [ "For indicating on ground", "false" ] } ] }, { "ch": "What are three most common pitot-static instruments?", "ansGr": [ { "ans": [ "The altimeter, airspeed indicator, and vertical speed indicator", "true" ] }, { "ans": [ "The altimeter, airspeed indicator, and compass", "false" ] }, { "ans": [ "The artificial horizon, airspeed indicator, and vertical speed indicator", "false" ] } ] }, { "ch": "What is the function of the pitot tube?", "ansGr": [ { "ans": [ "To capture impact air pressure.", "true" ] }, { "ans": [ "To capture ambiant air temperature", "false" ] }, { "ans": [ "To capture static air pressure.", "false" ] } ] }, { "ch": "Why are many pitot tubes heated during flight?", "ansGr": [ { "ans": [ "To prevent icing of the tube", "true" ] }, { "ans": [ "To prevent insect from entering the tube", "false" ] }, { "ans": [ "To keep the temperature of the tube stable.", "false" ] } ] }, { "ch": "How is pitot tube protected from icing during flight?", "ansGr": [ { "ans": [ "Electrically heated.", "true" ] }, { "ans": [ "By using de-icing fluid.", "false" ] }, { "ans": [ "By hot air.", "false" ] } ] }, { "ch": "What do static ports collect?", "ansGr": [ { "ans": [ "Static air pressure information", "true" ] }, { "ans": [ "Dynamic air pressure information", "false" ] }, { "ans": [ "Impact air pressure information", "false" ] } ] }, { "ch": "DADC stand for?", "ansGr": [ { "ans": [ "Digital Altitude Display Controller", "true" ] }, { "ans": [ "Directional Air Data Computer", "false" ] }, { "ans": [ "Digital air data compoment", "false" ] } ] }, { "ch": "What the input data is provided to the Air Data Computer?", "ansGr": [ { "ans": [ "Air pressures from the pitot-static systems", "true" ] }, { "ans": [ "Air pressures from the autopilot systems", "false" ] }, { "ans": [ "Air pressures from the cabin systems", "false" ] } ] }, { "ch": "Why are air data computers (ADCs) commonly used in these aircraft?", "ansGr": [ { "ans": [ "To compensate for air temperature and density.", "true" ] }, { "ans": [ "To calculate fuel consumption.", "false" ] }, { "ans": [ "To improve the aircraft's performance.", "false" ] } ] }, { "ch": "What is the parameter of altimeter indicated?", "ansGr": [ { "ans": [ "The height of the aircraft above a predetermined level", "true" ] }, { "ans": [ "The indicated air speed", "false" ] }, { "ans": [ "The vertical speed", "false" ] } ] }, { "ch": "How to measure the aircraft's altitude by altimeters?", "ansGr": [ { "ans": [ "By measuring the pressure of the atmospheric air", "true" ] }, { "ans": [ "By measuring the pressure of the cockpit and cabin", "false" ] }, { "ans": [ "By measuring the pressure of the cabin", "false" ] } ] }, { "ch": "How can altitude can be determined?", "ansGr": [ { "ans": [ "By measuring air pressure", "true" ] }, { "ans": [ "By measuring air temperature", "false" ] }, { "ans": [ "By measuring air humidity", "false" ] } ] }, { "ch": "How to produced the indication known as vertical airspeed?", "ansGr": [ { "ans": [ "By using differential pressure gauge that compares static pressure from the aircraft’s static system directed into a diaphragm", "true" ] }, { "ans": [ "By using differential pressure gauge that compares impact pressure from the aircraft’s static system directed into a diaphragm", "false" ] }, { "ans": [ "By using differential pressure gauge that compares static and impact pressure from the aircraft’s static system directed into a diaphragm", "false" ] } ] }, { "ch": "How does an analog VSI work?", "ansGr": [ { "ans": [ "By comparing static pressure inside and outside a diaphragm", "true" ] }, { "ans": [ "By measuring the difference between static and dynamic pressure", "false" ] }, { "ans": [ "By measuring the difference between static pressure and temperature", "false" ] } ] }, { "ch": "What is a variometer primarily used in?", "ansGr": [ { "ans": [ "Gliders and lighter-than-air aircraft", "true" ] }, { "ans": [ "Commercial airliners", "false" ] }, { "ans": [ "Helicopters", "false" ] } ] }, { "ch": "Where is the vertical speed information often displayed on a primary flight display?", "ansGr": [ { "ans": [ "Near the altimeter information", "true" ] }, { "ans": [ "Near the heading indicator", "false" ] }, { "ans": [ "Near the attitude indicator", "false" ] } ] }, { "ch": "What is the primary purpose of an airspeed indicator?", "ansGr": [ { "ans": [ "To measure the speed of an aircraft", "true" ] }, { "ans": [ "To measure the altitude of an aircraft", "false" ] }, { "ans": [ "To measure the direction of an aircraft", "false" ] } ] }, { "ch": "What is the critical Mach number?", "ansGr": [ { "ans": [ "The maximum speed an aircraft can reach without experiencing shock waves.", "true" ] }, { "ans": [ "The maximum speed an aircraft can reach.", "false" ] }, { "ans": [ "The minimum speed an aircraft needs to maintain to stay airborne.", "false" ] } ] }, { "ch": "What is the purpose of the red and white striped pointer on a Mach/airspeed indicator?", "ansGr": [ { "ans": [ "To indicate the aircraft's Mach number.", "true" ] }, { "ans": [ "To indicate the aircraft's heading.", "false" ] }, { "ans": [ "To indicate the aircraft's rate of climb or descent.", "false" ] } ] }, { "ch": "How to produced the indication known as indicated airspeed?", "ansGr": [ { "ans": [ "The relationship between the ram air pressure and static air pressure", "true" ] }, { "ans": [ "By airdata from static ports", "false" ] }, { "ans": [ "By airdata from pitot tubes", "false" ] } ] }, { "ch": "What are components of selsyn system?", "ansGr": [ { "ans": [ "A transmitter, an indicator, and connecting wires", "true" ] }, { "ans": [ "A transmitter, a receiver, and connecting wires", "false" ] }, { "ans": [ "A transmitter, an indicator, and rotatable contact arm", "false" ] } ] }, { "ch": "What component is attached to the centered rotor shaft in the indicator of the DC selsyn system", "ansGr": [ { "ans": [ "A permanent magnet", "true" ] }, { "ans": [ "An electromagnet", "false" ] }, { "ans": [ "A contact arm", "false" ] } ] }, { "ch": "What are components of transmitter of DC selsyn system?", "ansGr": [ { "ans": [ "A circular resistance winding and a rotatable contact arm", "true" ] }, { "ans": [ "A circular resistance winding and a pointer", "false" ] }, { "ans": [ "A rotatable contact arm and a permanent magnet", "false" ] } ] }, { "ch": "How to move the pointer of indicator of DC selsyn system?", "ansGr": [ { "ans": [ "The position of contact arm changes lead to the magnetic field in the indicator coils change", "true" ] }, { "ans": [ "The position of permanent magnet changes lead to the magnetic field in the indicator coils change", "false" ] }, { "ans": [ "The position of resistance winding changes lead to the magnetic field in the indicator coils change", "false" ] } ] }, { "ch": "RPM stand for?", "ansGr": [ { "ans": [ "Revolutions per minutes", "true" ] }, { "ans": [ "Ratio per minutes", "false" ] }, { "ans": [ "Rating per minutes", "false" ] } ] }, { "ch": "What is the function of tachometer in reciprocating engine?", "ansGr": [ { "ans": [ "To monitor engine power and to ensure the engine is operated within certified limits", "true" ] }, { "ans": [ "To monitor the speed of the compressor section of the engine", "false" ] }, { "ans": [ "To indicate the fuel pressure", "false" ] } ] }, { "ch": "What is the function of tachometer in gas turbine engine?", "ansGr": [ { "ans": [ "To monitor the speed of the compressor section of the engine", "true" ] }, { "ans": [ "To monitor engine power and to ensure the engine is operated within certified limits", "false" ] }, { "ans": [ "To indicate the fuel pressure", "false" ] } ] }, { "ch": "What is the purpose of an accelerometer?", "ansGr": [ { "ans": [ "To measures acceleration", "true" ] }, { "ans": [ "To measures air speed", "false" ] }, { "ans": [ "To measures altitude", "false" ] } ] }, { "ch": "What is the principle of the accelerometer?", "ansGr": [ { "ans": [ "The inertia principle", "true" ] }, { "ans": [ "The thermodynamic principle", "false" ] }, { "ans": [ "The principle of thermal expansion", "false" ] } ] }, { "ch": "What is concept of AOA (angle of attack) of the aircraft?", "ansGr": [ { "ans": [ "The angle formed between the wing cord centerline and the relative wind", "true" ] }, { "ans": [ "The angle formed between the wing and the relative wind", "false" ] }, { "ans": [ "The angle formed between the wing cord centerline and the fuselage", "false" ] } ] }, { "ch": "What is the function of angle of attack (AOA) instrument?", "ansGr": [ { "ans": [ "It helps the pilot monitor the AOA and control a stall occurs", "true" ] }, { "ans": [ "To ensure ice-free operation", "false" ] }, { "ans": [ "To displays the attitude information on a cockpit indicator", "false" ] } ] }, { "ch": "Which type of the temperature measuring instruments can be found in the aircraft?", "ansGr": [ { "ans": [ "Non-electric temperature indicator and electric temperature measuring indicator", "true" ] }, { "ans": [ "Non-electric temperature indicator and electric resistance thermometer", "false" ] }, { "ans": [ "Non-electric temperature indicator and thermocouple temperature indicators", "false" ] } ] }, { "ch": "What types of thermometers are used in aviation to measure temperature?", "ansGr": [ { "ans": [ "Non-electric temperature indicators and electrical thermometers", "true" ] }, { "ans": [ "Mercury thermometers and digital thermometers", "false" ] }, { "ans": [ "Only electrical thermometers", "false" ] } ] }, { "ch": "What are the principle parts of the electrical resistance thermometer?", "ansGr": [ { "ans": [ "The indicating instrument, the temperature-sensitive element (or bulb), the connecting wires and plug connectors", "true" ] }, { "ans": [ "The indicating instrument, the temperature-sensitive element (or bulb)", "false" ] }, { "ans": [ "The temperature-sensitive element (or bulb), the connecting wires and plug connectors", "false" ] } ] }, { "ch": "What are the main components of an electrical resistance thermometer?", "ansGr": [ { "ans": [ "Indicating instrument, temperature-sensitive element, connecting wires, plug connectors", "true" ] }, { "ans": [ "Bulb, battery, gauge, wire", "false" ] }, { "ans": [ "Thermometer, resistor, switch, gauge", "false" ] } ] }, { "ch": "What is the typical temperature range for electrical resistance thermometers?", "ansGr": [ { "ans": [ "*-70°C to 150°C", "true" ] }, { "ans": [ "*-70°C to 550°C", "false" ] }, { "ans": [ "550°C to 1050°C", "false" ] } ] }, { "ch": "What is the purpose of the closed-end metal tube attached to the threaded plug in an electrical resistance thermometer?", "ansGr": [ { "ans": [ "To protect the resistor element.", "true" ] }, { "ans": [ "To provide a connection to the indicator.", "false" ] }, { "ans": [ "To regulate the temperature of the resistor.", "false" ] } ] }, { "ch": "What are the function of ratiometer temperature measuring systems?", "ansGr": [ { "ans": [ "To measure engine oil, outside air, carburetor air, and other temperatures in many types of aircraft", "true" ] }, { "ans": [ "To measure EGT, outside air, carburetor air, and other temperatures in many types of aircraft", "false" ] }, { "ans": [ "To measure RMP, outside air, carburetor air, and other temperatures in many types of aircraft", "false" ] } ] }, { "ch": "What are the advantages of a ratiometer over a other thermometers?", "ansGr": [ { "ans": [ "The ratiometer is more stable and can deliver higher accuracy", "true" ] }, { "ans": [ "The ratiometer is more stable", "false" ] }, { "ans": [ "The ratiometer deliver higher accuracy", "false" ] } ] }, { "ch": "EGT stand for?", "ansGr": [ { "ans": [ "Exhaust Gas Temperature", "true" ] }, { "ans": [ "Engine Gas Temperature", "false" ] }, { "ans": [ "Exhaust Gas Tachometer", "false" ] } ] }, { "ch": "What is a thermocouple?", "ansGr": [ { "ans": [ "A circuit of two dissimilar metals joined at two junctions", "true" ] }, { "ans": [ "A circuit of two dissimilar metals joined at one junction.", "false" ] }, { "ans": [ "A circuit of two similar metals joined at two junctions.", "false" ] } ] }, { "ch": "How does a thermocouple work?", "ansGr": [ { "ans": [ "By measuring the voltage produced by the difference in temperature between the two junctions.", "true" ] }, { "ans": [ "By measuring the resistance change caused by the difference in temperature between the two junctions.", "false" ] }, { "ans": [ "By measuring the magnetic field produced by the difference in temperature between the two junctions.", "false" ] } ] }, { "ch": "What are two common applications of thermocouples in aircraft?", "ansGr": [ { "ans": [ "Measuring CHT and EGT", "true" ] }, { "ans": [ "Measuring OAT and EGT", "false" ] }, { "ans": [ "Measuring OAT and CHT", "false" ] } ] }, { "ch": "In what range of temperature is the thermocouple commonly used?", "ansGr": [ { "ans": [ "High temperature.", "true" ] }, { "ans": [ "Low temperature.", "false" ] }, { "ans": [ "Very low temperature.", "false" ] } ] }, { "ch": "How is the temperature measured in an EGT or TIT system?", "ansGr": [ { "ans": [ "Using multiple thermocouples spaced around the turbine casing or exhaust duct.", "true" ] }, { "ans": [ "Using multiple thermocouples located at the top of the turbine casing.", "false" ] }, { "ans": [ "Using multiple thermocouples located at the bottom of the turbine casing.", "false" ] } ] }, { "ch": "What is the purpose of the over temperature warning light in the TIT indicator?", "ansGr": [ { "ans": [ "To indicate when the engine is overheating.", "true" ] }, { "ans": [ "To signal a problem with the thermocouple system.", "false" ] }, { "ans": [ "To alert the pilot to a potential engine failure.", "false" ] } ] }, { "ch": "TIT stand for?", "ansGr": [ { "ans": [ "Turbine inlet temperature", "true" ] }, { "ans": [ "Total inlet temperature", "false" ] }, { "ans": [ "Turbine indicating temperature", "false" ] } ] }, { "ch": "What is data provided by EGT indicating system?", "ansGr": [ { "ans": [ "A visual temperature indication in the cockpit of the turbine exhaust gases as they leave the turbine unit", "true" ] }, { "ans": [ "A pressure indication in the cockpit of the turbine exhaust gases as they leave the turbine unit", "false" ] }, { "ans": [ "A visual temperature indication in the cockpit of the compressor as they leave the turbine unit", "false" ] } ] }, { "ch": "How does a simple TAT system measure air temperature?", "ansGr": [ { "ans": [ "By measuring the change in resistance of a platinum alloy element.", "true" ] }, { "ans": [ "By measuring the expansion of a metal coil.", "false" ] }, { "ans": [ "By measuring the pressure difference between two points.", "false" ] } ] }, { "ch": "Which type of the magnetic direction indicating instruments can be found in the aircraft?", "ansGr": [ { "ans": [ "Direct indicating magnetic compass, remote indicating compass, solid state magnetometers", "true" ] }, { "ans": [ "Direct indicating magnetic compass, remote indicating compass, gyroscopes", "false" ] }, { "ans": [ "Direct indicating magnetic compass, remote indicating compass, accelemeter", "false" ] } ] }, { "ch": "What is the function of the magnetic compass in the aircraft?", "ansGr": [ { "ans": [ "To indicates direction for the pilot", "true" ] }, { "ans": [ "To indicates attitude for the pilot", "false" ] }, { "ans": [ "To indicates altitude for the pilot", "false" ] } ] }, { "ch": "What is the principle of the magnetic compass ?", "ansGr": [ { "ans": [ "It takes advantage of the earth’s magnetic field.", "true" ] }, { "ans": [ "The thermodynamic principle", "false" ] }, { "ans": [ "The inertia principle", "false" ] } ] }, { "ch": "What is swinging the compass?", "ansGr": [ { "ans": [ "That is a deviation adjustment process", "true" ] }, { "ans": [ "That is a repair process", "false" ] }, { "ans": [ "That is a replacing process", "false" ] } ] }, { "ch": "What is maximum allowable magnetic deviation of compass?", "ansGr": [ { "ans": [ "10 degrees", "true" ] }, { "ans": [ "15 degrees", "false" ] }, { "ans": [ "5 degrees", "false" ] } ] }, { "ch": "What is the main cause of magnetic deviation of magnetic compass?", "ansGr": [ { "ans": [ "The local electromagnetic influence from metallic structures near the compass and operation aircraft’s electrical system", "true" ] }, { "ans": [ "The local electromagnetic influence from metallic structures near the compass", "false" ] }, { "ans": [ "The local electromagnetic influence from metallic structures near the compass and aircraft’s movement", "false" ] } ] }, { "ch": "What is information indicated in a vertical magnetic direction indicator?", "ansGr": [ { "ans": [ "A realistic reference of headings", "true" ] }, { "ans": [ "A realistic reference of wind direction", "false" ] }, { "ans": [ "A realistic reference of vertical speed", "false" ] } ] }, { "ch": "Where remote indicating compass usually canbe found in the aircraft?", "ansGr": [ { "ans": [ "Wing tip or vertical stabilizer", "true" ] }, { "ans": [ "Wing tip or horizontal stabilizer", "false" ] }, { "ans": [ "Vertical stabilizer or horizontal stabilizer", "false" ] } ] }, { "ch": "What are main components of a radio magnetic indicator?", "ansGr": [ { "ans": [ "A slaved gyro heading indication, solid pointer, hollow pointer", "true" ] }, { "ans": [ "A slaved gyro heading indication, solid pointer, hollow pointer, altitude indication", "false" ] }, { "ans": [ "A slaved gyro heading indication, solid pointer, hollow pointer, true air speed indication", "false" ] } ] }, { "ch": "What are the functions of the gyroscopic instruments in the aircraft?", "ansGr": [ { "ans": [ "They provide the pilot with critical attitude and directional information", "true" ] }, { "ans": [ "They provide the pilot with critical altitude and directional information", "false" ] }, { "ans": [ "They provide the pilot with critical attitude, alttitude and directional information", "false" ] } ] }, { "ch": "What are main sources of power for gyroscopic instruments?", "ansGr": [ { "ans": [ "A vacuum source, a pressure source and an electricity source", "true" ] }, { "ans": [ "A pressure source and an electricity source", "false" ] }, { "ans": [ "A vacuum source only", "false" ] } ] }, { "ch": "Which types of Gyroscopic Instrument Systems can be found in the aircraft?", "ansGr": [ { "ans": [ "Pressure driven Gyroscopic Instrument Systems and electrically-driven Gyroscopic Instrument Systems", "true" ] }, { "ans": [ "Pressure driven Gyroscopic Instrument Systems", "false" ] }, { "ans": [ "Electrically-driven Gyroscopic Instrument Systems", "false" ] } ] }, { "ch": "What are the advantages of an electric gyroscopes over a pressure driven gyroscopes?", "ansGr": [ { "ans": [ "It is powered by battery for a limited time if a generator fails or an engine is lost, contamination worries are reduces and saving weight", "true" ] }, { "ans": [ "It is powered by battery for a limited time if a generator fails or an engine is lost, contamination worries are reduces", "false" ] }, { "ans": [ "It is powered by battery for a limited time if a generator fails or an engine is lost", "false" ] } ] }, { "ch": "What are most common flight instruments are controlled by gyroscopes?", "ansGr": [ { "ans": [ "The attitude indicator, heading indicator, and turn needle of the turn- and-bank indicator", "true" ] }, { "ans": [ "The ground speed indicator, heading indicator, and turn needle of the turn- and-bank indicator", "false" ] }, { "ans": [ "The attitude indicator, heading indicator, and vertical speed indicator", "false" ] } ] }, { "ch": "What are design factors gyroscopic rigidity depends upon?", "ansGr": [ { "ans": [ "Weight for a given size, Angular velocity, Radius at which the weight is concentrated, Bearing friction", "true" ] }, { "ans": [ "Weight for a given size, Angular velocity, Radius at which the weight is concentrated, Sources of power", "false" ] }, { "ans": [ "Weight for a given size, Radius at which the weight is concentrated, Bearing friction", "false" ] } ] }, { "ch": "Which are main characteristics of mechanical gyros?", "ansGr": [ { "ans": [ "Gyroscopic rigidity and precession", "true" ] }, { "ans": [ "Gyroscopic rigidity and flexible", "false" ] }, { "ans": [ "Gyroscopic rigidity and compact", "false" ] } ] }, { "ch": "MEMS stand for?", "ansGr": [ { "ans": [ "Micro-Electro-Mechanical System", "true" ] }, { "ans": [ "Micro-Equip-Mechanical System", "false" ] }, { "ans": [ "Micro-Electro-Mechanical Solid", "false" ] } ] }, { "ch": "What are main advantages of MEMS over mechanical gyros?", "ansGr": [ { "ans": [ "Saving space and weight, increasing reliability with low cost", "true" ] }, { "ans": [ "Saving space and weight", "false" ] }, { "ans": [ "Increasing reliability with low cost", "false" ] } ] }, { "ch": "What information of attitude indicator is indicated in the cockit?", "ansGr": [ { "ans": [ "The pilot pitch and roll information", "true" ] }, { "ans": [ "The pilot pitch, roll and airspeed information", "false" ] }, { "ans": [ "The pilot pitch, roll and altitude information", "false" ] } ] }, { "ch": "What is concept of horizon bar of the arttificial horizon?", "ansGr": [ { "ans": [ "That is symbol, where the sky and ground meet", "true" ] }, { "ans": [ "That is symbol of the sky", "false" ] }, { "ans": [ "That is symbol of the ground", "false" ] } ] }, { "ch": "What is main function of directional gyro?", "ansGr": [ { "ans": [ "For direction", "true" ] }, { "ans": [ "For measuring altitude", "false" ] }, { "ans": [ "For measuring vertical speed", "false" ] } ] }, { "ch": "What is the purpose of the ball in a turn-and-slip indicator?", "ansGr": [ { "ans": [ "To indicate slip or skid during a turn", "true" ] }, { "ans": [ "To indicate the aircraft's bank angle", "false" ] }, { "ans": [ "To indicate the rate of turn", "false" ] } ] }, { "ch": "What is primary purpose of an autopilot system?", "ansGr": [ { "ans": [ "To reduce the work stain and fatigue of controlling the aircraft during long flights", "true" ] }, { "ans": [ "To indicates all necesssary for the pilot", "false" ] }, { "ans": [ "To controll the aircraft in bad weather", "false" ] } ] }, { "ch": "AFCS stand for?", "ansGr": [ { "ans": [ "Automatic flight control systems", "true" ] }, { "ans": [ "Autoflight flight control systems", "false" ] }, { "ans": [ "Automatic flight computer systems", "false" ] } ] }, { "ch": "What components do three axis autopilots control?", "ansGr": [ { "ans": [ "The ailerons, elevators, and the rudder", "true" ] }, { "ans": [ "The spoiler, elevators, and the rudder", "false" ] }, { "ans": [ "The ailerons, elevators, and the spoiler", "false" ] } ] }, { "ch": "Which type of the instrument that displays the flight director commands is known?", "ansGr": [ { "ans": [ "The flight director indicator (FDI), the attitude director indicator (ADI), the electronic attitude director indicator (EADI)", "true" ] }, { "ans": [ "The flight director indicator (FDI), the attitude director indicator (ADI)", "false" ] }, { "ans": [ "The attitude director indicator (ADI), the electronic attitude director indicator (EADI)", "false" ] } ] }, { "ch": "Which type of radios voice is often used to communicate between an aircraft and air traffic control?", "ansGr": [ { "ans": [ "VHF", "true" ] }, { "ans": [ "HF", "false" ] }, { "ans": [ "VLF", "false" ] } ] }, { "ch": "VHF radios are relatively", "ansGr": [ { "ans": [ "Short range radios", "true" ] }, { "ans": [ "Long range radios", "false" ] }, { "ans": [ "SATCOM radios", "false" ] } ] }, { "ch": "The frequencies of VHF radios used range from:", "ansGr": [ { "ans": [ "118.0 MHz to 136.975 MHz", "true" ] }, { "ans": [ "2 to 25 MHz", "false" ] }, { "ans": [ "1118.0 MHz to 1136.975 MHz", "false" ] } ] }, { "ch": "Which type of radios voice is often use for long distance communication with an operator’s base station?", "ansGr": [ { "ans": [ "HF", "true" ] }, { "ans": [ "VHF", "false" ] }, { "ans": [ "VLF", "false" ] } ] }, { "ch": "The high frequency (HF) radios are used for:", "ansGr": [ { "ans": [ "Long distance communication", "true" ] }, { "ans": [ "Short distance communication", "false" ] }, { "ans": [ "Medium distance communication", "false" ] } ] }, { "ch": "AMU stand for?", "ansGr": [ { "ans": [ "Audio management unit", "true" ] }, { "ans": [ "Auto management unit", "false" ] }, { "ans": [ "Audio moderm unit", "false" ] } ] }, { "ch": "What frequency are used in VOR and ILS?", "ansGr": [ { "ans": [ "VHF", "true" ] }, { "ans": [ "HF", "false" ] }, { "ans": [ "VLF", "false" ] } ] }, { "ch": "ILS stand for?", "ansGr": [ { "ans": [ "Instrument landing system", "true" ] }, { "ans": [ "Integrated landing system", "false" ] }, { "ans": [ "Infomantion landing system", "false" ] } ] }, { "ch": "The frequencies of Glideslope of ILS system used:", "ansGr": [ { "ans": [ "90 Hz and 150 Hz", "true" ] }, { "ans": [ "90 Hz", "false" ] }, { "ans": [ "150 Hz", "false" ] } ] }, { "ch": "What does Marker beacons system include?", "ansGr": [ { "ans": [ "A inner market beacon, a middle market beacon, a outer market beacon", "true" ] }, { "ans": [ "A inner market beacon, a middle market beacon", "false" ] }, { "ans": [ "A inner market beacon, a outer market beacon", "false" ] } ] }, { "ch": "ILS marker beacon lights are.", "ansGr": [ { "ans": [ "Blue, amber, white", "true" ] }, { "ans": [ "Blue, red, white", "false" ] }, { "ans": [ "Green, amber, white", "false" ] } ] }, { "ch": "What does RNAV mean?", "ansGr": [ { "ans": [ "Is a general term used to describe the navigation from point A to point B without direct over flight of navigational aids", "true" ] }, { "ans": [ "Is a general term used to describe the navigation from point A to point B follwing navigational aids", "false" ] }, { "ans": [ "Is a general term used to describe the navigation from point A to point B follwing informantion of gyroscopes", "false" ] } ] }, { "ch": "How many types of radar are used by air traffic control (ATC)?", "ansGr": [ { "ans": [ "2", "true" ] }, { "ans": [ "3", "false" ] }, { "ans": [ "4", "false" ] } ] }, { "ch": "What is a Traffic Collision Avoidance System (TCAS)?", "ansGr": [ { "ans": [ "A transponder-based air-to-air traffic monitoring and alerting system", "true" ] }, { "ans": [ "A transponder-based ground-to-air traffic monitoring and alerting system", "false" ] }, { "ans": [ "A traffic collision detection system for ground proximity alerts", "false" ] } ] }, { "ch": "A radio altimeter is used to measure the distance from the aircraft to:", "ansGr": [ { "ans": [ "The terrain directly beneath it", "true" ] }, { "ans": [ "The sea level", "false" ] }, { "ans": [ "The other aircrafts", "false" ] } ] }, { "ch": "How many common types of weather aids used in an aircraft flight deck?", "ansGr": [ { "ans": [ "3", "true" ] }, { "ans": [ "2", "false" ] }, { "ans": [ "4", "false" ] } ] }, { "ch": "How is the emergency locator transmitter (ELT) activated?", "ansGr": [ { "ans": [ "By excessive G-forces during a crash", "true" ] }, { "ans": [ "By pilot command from the cockpit only", "false" ] }, { "ans": [ "By low battery voltage", "false" ] } ] }, { "ch": "ADS-B is considered in segments:", "ansGr": [ { "ans": [ "ADS-B OUT and ADS-B IN", "true" ] }, { "ans": [ "ADS-B OUT, ADS-B IN and broadcasts", "false" ] }, { "ans": [ "ADS-B OUT; ADS-B IN and SGP receiver", "false" ] } ] }, { "ch": "GPWS stand for?", "ansGr": [ { "ans": [ "Ground proximity warning system", "true" ] }, { "ans": [ "Ground position warning system", "false" ] }, { "ans": [ "Ground proximity wiring system", "false" ] } ] }, { "ch": "What are the main segments of GPS?", "ansGr": [ { "ans": [ "The space segment, the control segment, and the user segment", "true" ] }, { "ans": [ "The space segment, the control segment", "false" ] }, { "ans": [ "The space segment, the user segment", "false" ] } ] }, { "ch": "The BITE is stand for:", "ansGr": [ { "ans": [ "Built In Test Equipment", "true" ] }, { "ans": [ "Backup Indication Test Equipment", "false" ] }, { "ans": [ "Built In Technical Equipment", "false" ] } ] }, { "ch": "The BITE can be built in to:", "ansGr": [ { "ans": [ "An individual LRU (Line Replacement Unit)", "true" ] }, { "ans": [ "Avionic Test Equipment", "false" ] }, { "ans": [ "All Aircraft System", "false" ] } ] }, { "ch": "Avionics test equipment can be classified into:", "ansGr": [ { "ans": [ "Two categories", "true" ] }, { "ans": [ "Three categories", "false" ] }, { "ans": [ "Four categories", "false" ] } ] }, { "ch": "What are two categories of Avionics test equipment?", "ansGr": [ { "ans": [ "Shop test equipment and portable test equipment", "true" ] }, { "ans": [ "Shop test equipment and onboard test equipment", "false" ] }, { "ans": [ "Onboard test equipment and portable test equipment", "false" ] } ] }, { "ch": "The oscilloscope measures variations of a parameter as:", "ansGr": [ { "ans": [ "A function of time and displays them graphically on a screen", "true" ] }, { "ans": [ "A function of frequency and displays them graphically on a screen", "false" ] }, { "ans": [ "A function of time and displays them digitally on a screen", "false" ] } ] }, { "ch": "The TDR is often used to check for standing waves in:", "ansGr": [ { "ans": [ "Transmission lines", "true" ] }, { "ans": [ "Reception lines", "false" ] }, { "ans": [ "Feedback lines", "false" ] } ] }, { "ch": "What are the advantage of SSTDR technology for the technician?", "ansGr": [ { "ans": [ "Ease of use, greater precision and portability", "true" ] }, { "ans": [ "Light weight, greater precision and portability", "false" ] }, { "ans": [ "Low cost, greater precision and portability", "false" ] } ] }, { "ch": "The pitot-static system must be tested:", "ansGr": [ { "ans": [ "Periodically", "true" ] }, { "ans": [ "One time per year", "false" ] }, { "ans": [ "One time per month", "false" ] } ] }, { "ch": "What does the IFR 4000 tests?", "ansGr": [ { "ans": [ "VHF NAV/ COM radio bands", "true" ] }, { "ans": [ "VHF COM radio bands", "false" ] }, { "ans": [ "VHF Radio NAV bands", "false" ] } ] }, { "ch": "The Data bus analyzers are used to:", "ansGr": [ { "ans": [ "Trouble shoot digital systems", "true" ] }, { "ans": [ "Detect failure of digital systems", "false" ] }, { "ans": [ "Communication in digital systems", "false" ] } ] }, { "ch": "The calibration intervals for test equipment is:", "ansGr": [ { "ans": [ "Varies", "true" ] }, { "ans": [ "Constant", "false" ] }, { "ans": [ "Not mention", "false" ] } ] }, { "ch": "The calibration intervals for test equipment varies with:", "ansGr": [ { "ans": [ "The type of equipment, environment, and use", "true" ] }, { "ans": [ "The manufacturer’s recommendation", "false" ] }, { "ans": [ "The Calibration Standards", "false" ] } ] } ]