[ { "part": "M13.5 ATA 24", "ch": "What is the purpose of the battery small connector?", "ansGr": [ { "ans": [ "To control battery & its status", "true" ] }, { "ans": [ "To deliver high power to bus sytem", "false" ] }, { "ans": [ "To protect high power to bus system", "false" ] } ] }, { "ch": "What is the purpose of generator control unit (GCU)?", "ansGr": [ { "ans": [ "Voltage regulation & frequency control", "true" ] }, { "ans": [ "Load management", "false" ] }, { "ans": [ "Phases control", "false" ] } ] }, { "ch": "How is battery is classified?", "ansGr": [ { "ans": [ "Primary cell battery & secondary cell battery", "true" ] }, { "ans": [ "Primary cell battery", "false" ] }, { "ans": [ "Lead acid & secondary cell batteries", "false" ] } ] }, { "ch": "What is the battery?", "ansGr": [ { "ans": [ "Battery constructs some cells connect together", "true" ] }, { "ans": [ "Battery is the cell", "false" ] }, { "ans": [ "Battery constructs 12 cells", "false" ] } ] }, { "ch": "How many electrodes are there in a cell battery?", "ansGr": [ { "ans": [ "2", "true" ] }, { "ans": [ "12", "false" ] }, { "ans": [ "24", "false" ] } ] }, { "ch": "What is the separator in a cell battery for?", "ansGr": [ { "ans": [ "To keep positive & negative source separated", "true" ] }, { "ans": [ "To keep electrolyte for compensation", "false" ] }, { "ans": [ "To separate between cells", "false" ] } ] }, { "ch": "What is cell battery vent-plug for?", "ansGr": [ { "ans": [ "Release gases & electrolyte leaks", "true" ] }, { "ans": [ "Protect from over pressure in the cell", "false" ] }, { "ans": [ "Protect electrolyte leaked", "false" ] } ] }, { "ch": "How many volts for each cell in Ni-Cd battery is?", "ansGr": [ { "ans": [ "1.2 volts", "true" ] }, { "ans": [ "12 volts", "false" ] }, { "ans": [ "2 volts", "false" ] } ] }, { "ch": "What is the battery charger?", "ansGr": [ { "ans": [ "The unit monitors the condition of the battery", "true" ] }, { "ans": [ "unit to control the battery charge", "false" ] }, { "ans": [ "unit to monitor the battery short circuit", "false" ] } ] }, { "ch": "What is ventilation system in Ni-Cd battery for?", "ansGr": [ { "ans": [ "To control battery temperature", "true" ] }, { "ans": [ "To control electrolyte level", "false" ] }, { "ans": [ "To control battery from too low temperature", "false" ] } ] }, { "ch": "Where is RAT (Ram Air Turbine) located in aircraft?", "ansGr": [ { "ans": [ "Typically inside the fuselage", "true" ] }, { "ans": [ "On the wing tip", "false" ] }, { "ans": [ "On the engine lowest point", "false" ] } ] }, { "ch": "What is hot battery bus?", "ansGr": [ { "ans": [ "Bus is wired from battery directly", "true" ] }, { "ans": [ "Bus is heated", "false" ] }, { "ans": [ "Bus is never overloaded", "false" ] } ] }, { "ch": "What DC or AC is used for charge battery?", "ansGr": [ { "ans": [ "DC", "true" ] }, { "ans": [ "AC", "false" ] }, { "ans": [ "Whatever DC or AC provided battery is supplied", "false" ] } ] }, { "ch": "What DC or AC is used for suppy battery charger?", "ansGr": [ { "ans": [ "AC", "true" ] }, { "ans": [ "DC", "false" ] }, { "ans": [ "Whatever DC or AC provided battery is supplied", "false" ] } ] }, { "ch": "How many types of fuse are?", "ansGr": [ { "ans": [ "Fast acting & slow blow fuses", "true" ] }, { "ans": [ "Slow acting & fast blow fuses", "false" ] }, { "ans": [ "Only fast acting fuse", "false" ] } ] }, { "ch": "What kind of power AC or DC is used in large aircraft?", "ansGr": [ { "ans": [ "AC from its generators", "true" ] }, { "ans": [ "DC from its generators", "false" ] }, { "ans": [ "DC from batteries", "false" ] } ] }, { "ch": "Which one following is correct for parallel-bus system?", "ansGr": [ { "ans": [ "Generator are connected to each other", "true" ] }, { "ans": [ "Generator buses are not linked to each other", "false" ] }, { "ans": [ "Generator are separated to each other", "false" ] } ] }, { "ch": "What types are voltage regulator?", "ansGr": [ { "ans": [ "Electromechanical & solid state types", "true" ] }, { "ans": [ "Electromechanical & Electromagnetic types", "false" ] }, { "ans": [ "Solid state & Electromagnetic types", "false" ] } ] }, { "ch": "What is secondary cell batteries?", "ansGr": [ { "ans": [ "Rechargable battery", "true" ] }, { "ans": [ "Non-recharable battery", "false" ] }, { "ans": [ "Battery with cathode made of Zinc", "false" ] } ] }, { "ch": "What charge in the cathode terminal in battery cell?", "ansGr": [ { "ans": [ "Positive", "true" ] }, { "ans": [ "Neutral", "false" ] }, { "ans": [ "Negative", "false" ] } ] }, { "ch": "What charge in the anode terminal in battery cell?", "ansGr": [ { "ans": [ "Negative", "true" ] }, { "ans": [ "Neutral", "false" ] }, { "ans": [ "Positiive", "false" ] } ] }, { "ch": "What is battery open circuit voltage?", "ansGr": [ { "ans": [ "Voltage of the battery when it is not connected to a load", "true" ] }, { "ans": [ "Voltage of the battery when it is connected to a load", "false" ] }, { "ans": [ "Voltage of the battery when it is in-charged", "false" ] } ] }, { "ch": "What happen for electrolyte during flooded lead acid in charged?", "ansGr": [ { "ans": [ "Water loss", "true" ] }, { "ans": [ "Electrolyte is no changed", "false" ] }, { "ans": [ "Water raised", "false" ] } ] }, { "ch": "How to protect postive & negative plates from touching to each other inside the cell?", "ansGr": [ { "ans": [ "By separator", "true" ] }, { "ans": [ "Keep both postive & negative plates a distance", "false" ] }, { "ans": [ "cells are physically separated from each other", "false" ] } ] }, { "ch": "What aircraft attitude does affect to cell battery vent plug?", "ansGr": [ { "ans": [ "No attitudes", "true" ] }, { "ans": [ "Upside down attitude", "false" ] }, { "ans": [ "Too much roll appears", "false" ] } ] }, { "ch": "What result when sealed lead-acid battery being charged?", "ansGr": [ { "ans": [ "No water loss", "true" ] }, { "ans": [ "Water loss", "false" ] }, { "ans": [ "Oxygen & hydrogen are gasious", "false" ] } ] }, { "ch": "How is about water loss during sealed lead-acid charge?", "ansGr": [ { "ans": [ "Water looses very minor", "true" ] }, { "ans": [ "Water loss is major, and must be filled", "false" ] }, { "ans": [ "Water loss is major and must be monitored", "false" ] } ] }, { "ch": "Is Nikel-Cadimium battery in aircraft sealed type or flooded type?", "ansGr": [ { "ans": [ "Flooded type", "true" ] }, { "ans": [ "Sealed type", "false" ] }, { "ans": [ "Partial sealed type", "false" ] } ] }, { "ch": "How does ambient temperature affect to Ni-Cd battery capacity?", "ansGr": [ { "ans": [ "Decreasing temperature reduces battery capacity", "true" ] }, { "ans": [ "Decreasing tempearature does not change battery capacity", "false" ] }, { "ans": [ "Decreasing tempearature may raise battery capacity", "false" ] } ] }, { "ch": "What is called battery thermal runaway?", "ansGr": [ { "ans": [ "Combination high tempearature & over charging", "true" ] }, { "ans": [ "Overcharging situation", "false" ] }, { "ans": [ "Very hign temperature", "false" ] } ] }, { "ch": "How does ions flow when battery is in charged?", "ansGr": [ { "ans": [ "Ions move from cathode to anode", "true" ] }, { "ans": [ "Ions move from anode to cathode", "false" ] }, { "ans": [ "Ions do not move when battery is charged", "false" ] } ] }, { "ch": "What type flooded or sealed battery is for Lithium battery?", "ansGr": [ { "ans": [ "Sealed battery", "true" ] }, { "ans": [ "Flooded battery", "false" ] }, { "ans": [ "Lithium battery is new technology not belongs to sealed nor flooded type", "false" ] } ] }, { "ch": "What does RAT (Ram Air Turbine) deploy for?", "ansGr": [ { "ans": [ "For cover electrical power for flight control & instruments", "true" ] }, { "ans": [ "For cover electrical power for charge batteries", "false" ] }, { "ans": [ "For cover electrical power for whole flight", "false" ] } ] }, { "ch": "What does battery thermal switch function?", "ansGr": [ { "ans": [ "To interrupt charging if battery or its changer too hot", "true" ] }, { "ans": [ "To interrupt battry when battery is too hot during discharge", "false" ] }, { "ans": [ "To interrupt discharging if battery is too hot", "false" ] } ] }, { "ch": "Is battery charging available when emergency case?", "ansGr": [ { "ans": [ "No", "true" ] }, { "ans": [ "Yes", "false" ] }, { "ans": [ "Yes, after power checked", "false" ] } ] }, { "ch": "Which AC generators are typically equipped in the large aircraft?", "ansGr": [ { "ans": [ "Main AC generators, APU AC generator & emergency generator", "true" ] }, { "ans": [ "Main AC generators, APU AC generator", "false" ] }, { "ans": [ "Main AC generators, APU AC generator, emergency generator statis inverter", "false" ] } ] }, { "ch": "What is bus power control?", "ansGr": [ { "ans": [ "Control electrical distribution between the various busses", "true" ] }, { "ans": [ "Control electrical distribution between main generators", "false" ] }, { "ans": [ "Control each main generator", "false" ] } ] }, { "ch": "How does BPCU (Bus Power Control Unit) monitor electrical system?", "ansGr": [ { "ans": [ "By current transformer", "true" ] }, { "ans": [ "By sensors", "false" ] }, { "ans": [ "By communication with GCU (Generator Control Unit)", "false" ] } ] }, { "ch": "How to cool the generator?", "ansGr": [ { "ans": [ "Cooled by oil", "true" ] }, { "ans": [ "Cooled by fuel", "false" ] }, { "ans": [ "Cooled by water", "false" ] } ] }, { "ch": "What is the IDG (Integrated Drive Generator)?", "ansGr": [ { "ans": [ "The generator is driven fixed velocity & integrated in constant speed drive unit", "true" ] }, { "ans": [ "The generator is driven fixed velocity by engine gearbox shaft", "false" ] }, { "ans": [ "The generator is driven fixed velocity by constant speed drive unit", "false" ] } ] }, { "ch": "How many types to control DC generator?", "ansGr": [ { "ans": [ "Electro-mechanical & solid state type controls", "true" ] }, { "ans": [ "Mechanical & solid state type controls", "false" ] }, { "ans": [ "Electro-mechanical & Electronic type controls", "false" ] } ] }, { "ch": "How to control generator in high output generators?", "ansGr": [ { "ans": [ "Use combination starter-generator into a house", "true" ] }, { "ans": [ "Use more starters", "false" ] }, { "ans": [ "Use double prallel fileds", "false" ] } ] }, { "ch": "How many voltage regulators are there ia aircraft?", "ansGr": [ { "ans": [ "GCU, carbon pile & 3-unit regulators", "true" ] }, { "ans": [ "GCU, carbon pile & starter-generator regulators", "false" ] }, { "ans": [ "Carbon pile & 3-unit regulators", "false" ] } ] }, { "ch": "How many type(s) of voltage regulator is (are) there in DC alterator?", "ansGr": [ { "ans": [ "Vibrating relay & solid state types", "true" ] }, { "ans": [ "solid state type", "false" ] }, { "ans": [ "Vibrating relay type", "false" ] } ] }, { "ch": "How many concepts for keep aircraft electrical system be reliable?", "ansGr": [ { "ans": [ "2", "true" ] }, { "ans": [ "3", "false" ] }, { "ans": [ "1", "false" ] } ] }, { "ch": "How does TR (Rectifier transformer) in the aircraft work?", "ansGr": [ { "ans": [ "Step down the voltage", "true" ] }, { "ans": [ "Step up the voltage", "false" ] }, { "ans": [ "Step down the voltage & keep the phases", "false" ] } ] }, { "ch": "Which LRU does BPCU control?", "ansGr": [ { "ans": [ "BTB (Bus Tie Breaker)", "true" ] }, { "ans": [ "GB (Generator Breaker)", "false" ] }, { "ans": [ "GC (Generator Contactor)", "false" ] } ] }, { "ch": "What must be fulfilled for generators when parallel operation?", "ansGr": [ { "ans": [ "They must be same voltage, same frequency & in phases", "true" ] }, { "ans": [ "They must be same current & in phases", "false" ] }, { "ans": [ "They must be same voltage & in phases", "false" ] } ] }, { "ch": "How many types of inverter are there in the aircraft?", "ansGr": [ { "ans": [ "Rotary & static inverters", "true" ] }, { "ans": [ "single & 3-phases static inverster", "false" ] }, { "ans": [ "single & 3-phases rotary inverster", "false" ] } ] }, { "ch": "What is the positvie features of static inverter?", "ansGr": [ { "ans": [ "Light weigh, compact", "true" ] }, { "ans": [ "Small, cheap", "false" ] }, { "ans": [ "Compact, High tolerance", "false" ] } ] }, { "ch": "What is the purpose of current transformer?", "ansGr": [ { "ans": [ "Sensen current for protection", "true" ] }, { "ans": [ "Change current strength for loads", "false" ] }, { "ans": [ "Control loads by its current", "false" ] } ] }, { "ch": "What is the breakover voltage for SCR (Silicone Controlled Rectifier)?", "ansGr": [ { "ans": [ "Voltage that causes SCR to conduct the current", "true" ] }, { "ans": [ "Voltage that causes SCR to destroy", "false" ] }, { "ans": [ "Operation voltage", "false" ] } ] }, { "ch": "What is the current limiting devices?", "ansGr": [ { "ans": [ "Circuit breaker & fuse", "true" ] }, { "ans": [ "Fuse", "false" ] }, { "ans": [ "Circuit breaker", "false" ] } ] }, { "ch": "What is slow blow fuse?", "ansGr": [ { "ans": [ "Coiled inside fuse is designed to open only on a continued overload", "true" ] }, { "ans": [ "Coiled inside fuse is designed to melt quickly when overload", "false" ] }, { "ans": [ "Resetable fuse", "false" ] } ] }, { "ch": "Why is primary cell battery unchargable?", "ansGr": [ { "ans": [ "Electrodes are worn & lost", "true" ] }, { "ans": [ "Electrolyte is lost", "false" ] }, { "ans": [ "Electrodes are metal which cause short circuit if charged", "false" ] } ] }, { "ch": "What will happen when charging secondary cell battery?", "ansGr": [ { "ans": [ "Battery is charged", "true" ] }, { "ans": [ "Battery is defective", "false" ] }, { "ans": [ "Cell electrodes are worn", "false" ] } ] }, { "ch": "What will happen when charging primary cell battery?", "ansGr": [ { "ans": [ "Battery is defective", "true" ] }, { "ans": [ "Battery is charging", "false" ] }, { "ans": [ "Cell electrolyte is raised", "false" ] } ] }, { "ch": "Describle secondary cell battery construction?", "ansGr": [ { "ans": [ "Many cells which each consists positive & nagetive electrodes connect to each other", "true" ] }, { "ans": [ "One cell with postive & agetive electrodes", "false" ] }, { "ans": [ "One cell with postive & agetive electrodes & electrolyte", "false" ] } ] }, { "ch": "How many cells 1.2V are needed for an output 12V battery?", "ansGr": [ { "ans": [ "6 cells in parallel", "true" ] }, { "ans": [ "6 cells in series", "false" ] }, { "ans": [ "one cell 12V", "false" ] } ] }, { "ch": "What is gas escaped from cells in the flooded lead acid battery?", "ansGr": [ { "ans": [ "Hydogen at negative plates", "true" ] }, { "ans": [ "Oxygen at negative plates", "false" ] }, { "ans": [ "No gas is escaped from the cell", "false" ] } ] }, { "ch": "What action will be when flooded lead acid is in-charged?", "ansGr": [ { "ans": [ "Electrolyte is monitored", "true" ] }, { "ans": [ "Acid is filled more", "false" ] }, { "ans": [ "Lead electrode wearing rate is monitored", "false" ] } ] }, { "ch": "What material is made of positive plate in flooded lead acid battery?", "ansGr": [ { "ans": [ "Lead peroxide", "true" ] }, { "ans": [ "Lead", "false" ] }, { "ans": [ "Lead & iron alloy", "false" ] } ] }, { "ch": "What is the purpose of seperator in a cell battery?", "ansGr": [ { "ans": [ "To keep postive & negative plates from short circuit", "true" ] }, { "ans": [ "To collect more postive ions in electrolyte", "false" ] }, { "ans": [ "To isolate ions from touching electrodes", "false" ] } ] }, { "ch": "How does cell battery protect from electrolyte leak when aircraft is change attitude?", "ansGr": [ { "ans": [ "A likely conic shape lead weight inside cell seals electrolyte from leakage", "true" ] }, { "ans": [ "When aircraft changes attitude, leak must be accounted", "false" ] }, { "ans": [ "Vent plug is made of rubber which keep minimum electrolyte leakage", "false" ] } ] }, { "ch": "How to protect external power from incorrect polarity?", "ansGr": [ { "ans": [ "Reverse polarity diode is equipped from external power receptacle to its circuit", "true" ] }, { "ans": [ "External power will damage if incorrect polarity occurs", "false" ] }, { "ans": [ "External power control unit will control this incorrection", "false" ] } ] }, { "ch": "Difference between flooded battery & sealed battery?", "ansGr": [ { "ans": [ "Flooded battery has filled electrolyte", "true" ] }, { "ans": [ "Sealed battery has free electrolyte", "false" ] }, { "ans": [ "Flooded battery has no free electrolyte", "false" ] } ] }, { "ch": "Where is the enviroment for ions exchange in sealed lead-acid battery?", "ansGr": [ { "ans": [ "Environment is electrolyte which is absorbed into glass-mat separator", "true" ] }, { "ans": [ "Environment is electrolyte", "false" ] }, { "ans": [ "No electrolyte", "false" ] } ] }, { "ch": "Why sealed lead acid battery wil not loss water during charge?", "ansGr": [ { "ans": [ "Oxygen & hydrogen will not being gases", "true" ] }, { "ans": [ "No water added then no water lost", "false" ] }, { "ans": [ "Because it's sealed", "false" ] } ] }, { "ch": "There is small water loss for sealed lead-acid battery. What is the cause?", "ansGr": [ { "ans": [ "Self discharge reactions", "true" ] }, { "ans": [ "Charging situation", "false" ] }, { "ans": [ "Discharging situation", "false" ] } ] }, { "ch": "How many volts is typically for each cell in secondary cell battery?", "ansGr": [ { "ans": [ "2 volts", "true" ] }, { "ans": [ "1.2 volts", "false" ] }, { "ans": [ "12 volts", "false" ] } ] }, { "ch": "What condition of battery temperature does battery charger protect?", "ansGr": [ { "ans": [ "Low & high tempearature", "true" ] }, { "ans": [ "High temperature", "false" ] }, { "ans": [ "Low temperature", "false" ] } ] }, { "ch": "Battery charger detects overheat signal. How is about system response?", "ansGr": [ { "ans": [ "Battery charger isolates the battery & send fault signal to load management system", "true" ] }, { "ans": [ "Battery charger controls battery works in degraded mode", "false" ] }, { "ans": [ "It give options for user to choose if continue to use battery", "false" ] } ] }, { "ch": "Which range of ambient tempearature does Ni-Cd battery can work normally?", "ansGr": [ { "ans": [ "15 - 32 degree of Celcius", "true" ] }, { "ans": [ "over 90 degree of Fahrenheit", "false" ] }, { "ans": [ "under 60 degree of Fahrenheit", "false" ] } ] }, { "ch": "When does battery thermal runaway occur?", "ansGr": [ { "ans": [ "Combination high tempearature & over charging occur", "true" ] }, { "ans": [ "Overcharging situation occurs", "false" ] }, { "ans": [ "Very hign temperature occurs", "false" ] } ] }, { "ch": "What is following may happen if a cell is shorted inside Ni-Cd battery?", "ansGr": [ { "ans": [ "Current is excessive & temperature increases", "true" ] }, { "ans": [ "Current is very low & temperature decreases", "false" ] }, { "ans": [ "Current is very high & temperature decreases", "false" ] } ] }, { "ch": "What are advantages of Lithium battery rather conventional batteries?", "ansGr": [ { "ans": [ "High capacity & light weight", "true" ] }, { "ans": [ "High capacity & high weight", "false" ] }, { "ans": [ "Light weight", "false" ] } ] }, { "ch": "How many volts is typically for each cell in Lithium battery?", "ansGr": [ { "ans": [ "3.7 volts", "true" ] }, { "ans": [ "5 volts", "false" ] }, { "ans": [ "1.2 volts", "false" ] } ] }, { "ch": "How is battery backup during flight in electrical emergency case?", "ansGr": [ { "ans": [ "Batteries supplies standby power until system is recovered", "true" ] }, { "ans": [ "Battery supplies whole system until landing", "false" ] }, { "ans": [ "Battery supplies Ram Air Turbine deployment", "false" ] } ] }, { "ch": "Where does signal in the battery small connector go to?", "ansGr": [ { "ans": [ "To the battery charger", "true" ] }, { "ans": [ "To the bus system", "false" ] }, { "ans": [ "To the remain battery", "false" ] } ] }, { "ch": "How hot battery bus is configured?", "ansGr": [ { "ans": [ "Bus is wired directly from battery", "true" ] }, { "ans": [ "Bus is wired with tempearature sensor", "false" ] }, { "ans": [ "Bus is wired to battery charger", "false" ] } ] }, { "ch": "How to control batttery discharge or charging from out source?", "ansGr": [ { "ans": [ "By control relays", "true" ] }, { "ans": [ "By contactors", "false" ] }, { "ans": [ "By central processor", "false" ] } ] }, { "ch": "How many power panels in B777 electrical load management system (ELMS)?", "ansGr": [ { "ans": [ "7", "true" ] }, { "ans": [ "5", "false" ] }, { "ans": [ "6", "false" ] } ] }, { "ch": "How to supply power if all AC generators failed?", "ansGr": [ { "ans": [ "Batteries supply to essential systems", "true" ] }, { "ans": [ "Emergency generator supplies to essential systems", "false" ] }, { "ans": [ "Static inverters supply to essential systems", "false" ] } ] }, { "ch": "How many AC generators are driven by each engine B777?", "ansGr": [ { "ans": [ "Two", "true" ] }, { "ans": [ "One", "false" ] }, { "ans": [ "Four", "false" ] } ] }, { "ch": "How to power main AC generator?", "ansGr": [ { "ans": [ "Engine shaft", "true" ] }, { "ans": [ "Hydraulic motor", "false" ] }, { "ans": [ "Ram air", "false" ] } ] }, { "ch": "How to power AC emergency generator in Airbus aircraft?", "ansGr": [ { "ans": [ "Ram air", "true" ] }, { "ans": [ "Electric motor", "false" ] }, { "ans": [ "Engine shaft", "false" ] } ] }, { "ch": "Which one following controls electrical distribution?", "ansGr": [ { "ans": [ "BPCU (Bus Power Control Unit)", "true" ] }, { "ans": [ "GCU (Generator Control Unit)", "false" ] }, { "ans": [ "Electrical Load Management System (ELMS)", "false" ] } ] }, { "ch": "Which one following controls AC generator?", "ansGr": [ { "ans": [ "GCU (Generator Control Unit)", "true" ] }, { "ans": [ "BPCU (Bus Power Control Unit)", "false" ] }, { "ans": [ "Generator Breaker (GB)", "false" ] } ] }, { "ch": "How does generator breaker (GB) work when generator control unit detects overload?", "ansGr": [ { "ans": [ "Trip to isolate its generator circuit", "true" ] }, { "ans": [ "Close to connect power to main generator circuit", "false" ] }, { "ans": [ "Overload is not GB functions", "false" ] } ] }, { "ch": "What is principle of current transformer?", "ansGr": [ { "ans": [ "Induced voltage is measured without touching main cables", "true" ] }, { "ans": [ "Voltage is measured by tapping from main cables", "false" ] }, { "ans": [ "Electromechanical effect", "false" ] } ] }, { "ch": "How to compare BPCU (Bus Power Control Unit) with GCU (Generator Control Unit)?", "ansGr": [ { "ans": [ "BPCU & GCU are for power control", "true" ] }, { "ans": [ "GCU is for load control while BPCU is for source control", "false" ] }, { "ans": [ "BPCU is for load control while GCU is for source control", "false" ] } ] }, { "ch": "What is advantages of brushless generator?", "ansGr": [ { "ans": [ "Less maintenance required & faithful", "true" ] }, { "ans": [ "Light weight", "false" ] }, { "ans": [ "Low cost", "false" ] } ] }, { "ch": "What is the difference between brushed & brushless generators?", "ansGr": [ { "ans": [ "Brushless generator first stage rotor is permanent magnet", "true" ] }, { "ans": [ "Brushless generator first stage rotor is winding", "false" ] }, { "ans": [ "Brushless generator second stage rotor is permanent magnet", "false" ] } ] }, { "ch": "How to release heat for oil which cools the alterator?", "ansGr": [ { "ans": [ "By other cooler", "true" ] }, { "ans": [ "By natural cool", "false" ] }, { "ans": [ "By water cooler", "false" ] } ] }, { "ch": "Which one keep fix frequency for generator 400Hz?", "ansGr": [ { "ans": [ "CSD (Constant Speed Drive)", "true" ] }, { "ans": [ "Generator by itself", "false" ] }, { "ans": [ "Inverter", "false" ] } ] }, { "ch": "How CSD (Constant Speed Drive) keeps fixed speed to generator rotor?", "ansGr": [ { "ans": [ "Hydraulic pump & hydraulic drive turn alternator which speed is keep fixed around specific rpm", "true" ] }, { "ans": [ "CSD communicates with frequency inverter to keep fixed rpm", "false" ] }, { "ans": [ "It has same size gears inside for keep constant speed at output", "false" ] } ] }, { "ch": "How is about magnetic filed strength if output generator increases?", "ansGr": [ { "ans": [ "More magnetic filed", "true" ] }, { "ans": [ "Less magnetic field", "false" ] }, { "ans": [ "Magnetic field is constant", "false" ] } ] }, { "ch": "How is about magnetic filed strength if output generator decreases?", "ansGr": [ { "ans": [ "Less magnetic field", "true" ] }, { "ans": [ "More magnetic filed", "false" ] }, { "ans": [ "Magnetic field is constant", "false" ] } ] }, { "ch": "How does differential protection in GCU work?", "ansGr": [ { "ans": [ "Cut off load bus if sensed voltage is not within specific tolerance", "true" ] }, { "ans": [ "Cut off load bus if sensed voltage is within specific tolerance", "false" ] }, { "ans": [ "Cut off load bus if sensed voltage is very low", "false" ] } ] }, { "ch": "What is reverse current protection of GCU?", "ansGr": [ { "ans": [ "Protect a failed generator from being damaged by cut it off", "true" ] }, { "ans": [ "Protection generator from over-excitation", "false" ] }, { "ans": [ "Protect a generator from supply more current to loads", "false" ] } ] }, { "ch": "Which field winding in starter-generator is for engine start?", "ansGr": [ { "ans": [ "Series field", "true" ] }, { "ans": [ "Shunt filed", "false" ] }, { "ans": [ "Parallel field", "false" ] } ] }, { "ch": "Which field winding in starter-generator is for generator control?", "ansGr": [ { "ans": [ "Shunt filed", "true" ] }, { "ans": [ "Series field", "false" ] }, { "ans": [ "Both series & parallel fileds", "false" ] } ] }, { "ch": "What is inside 3-unit regulator?", "ansGr": [ { "ans": [ "Relays", "true" ] }, { "ans": [ "Circuit breaker", "false" ] }, { "ans": [ "Contactor", "false" ] } ] }, { "ch": "What is the relation between carbon disk & generator output?", "ansGr": [ { "ans": [ "Carbon disk resistance is inversely propotional with generator output", "true" ] }, { "ans": [ "Carbon disk resistance is propotional with generator output", "false" ] }, { "ans": [ "Less resistance carbon disks, less generator output", "false" ] } ] }, { "ch": "How does DC alterator generate DC?", "ansGr": [ { "ans": [ "By rotated rectifier assembly inside alterator", "true" ] }, { "ans": [ "By transformer", "false" ] }, { "ans": [ "By static rectifier assembly", "false" ] } ] }, { "ch": "How to connect DC power from its alterator to load?", "ansGr": [ { "ans": [ "By slip rings", "true" ] }, { "ans": [ "By breaker", "false" ] }, { "ans": [ "By contactor", "false" ] } ] }, { "ch": "What is difference between solid state type & vibrating type regulators in DC alterator?", "ansGr": [ { "ans": [ "Solid state type regulator has no moving part", "true" ] }, { "ans": [ "Solid state type regulator has moving part", "false" ] }, { "ans": [ "Vibrating type regulator has no moving part", "false" ] } ] }, { "ch": "What concept is for keep electrical system reliable in the aircraft?", "ansGr": [ { "ans": [ "Redundancy sources & essential loads are supplied from many sources", "true" ] }, { "ans": [ "Redundancy sources & crossload sources", "false" ] }, { "ans": [ "Redundancy sources", "false" ] } ] }, { "ch": "What is happening if main generators in the split-bus system failed?", "ansGr": [ { "ans": [ "Electrical system is collapsed", "true" ] }, { "ans": [ "Electrical system is redundancy", "false" ] }, { "ans": [ "Electrical system is double loaded", "false" ] } ] }, { "ch": "How to save the electrical system if a main generator is failed in the air?", "ansGr": [ { "ans": [ "APU generator can be used for back up lost main generator", "true" ] }, { "ans": [ "RAT (Ram Air Turbine) deploys for backup lost main generator", "false" ] }, { "ans": [ "The remain generator can be used for back up lost main generator", "false" ] } ] }, { "ch": "How is about AC BUS 1 & 2 conditions in split-bus system during normal configuration?", "ansGr": [ { "ans": [ "They are isolated to each other", "true" ] }, { "ans": [ "They are tied to each other", "false" ] }, { "ans": [ "AC BUS 1 is designed to control AC BUS 2", "false" ] } ] }, { "ch": "What will happen if a main generator in split-bus system is failed?", "ansGr": [ { "ans": [ "BTB (Bus Tie Breaker) is closed", "true" ] }, { "ans": [ "BTB (Bus Tie Breaker) is opened until main generator is restored", "false" ] }, { "ans": [ "BTB (Bus Tie Breaker) is opened", "false" ] } ] }, { "ch": "What will happen if all main generators are failed?", "ansGr": [ { "ans": [ "AC & DC are saved by batteries", "true" ] }, { "ans": [ "AC & DC are saved by APU generator & batteries respectively", "false" ] }, { "ans": [ "AC & DC are saved by RAT (Ram Air Turbine) & batteries respectively", "false" ] } ] }, { "ch": "What will happen if a main generator in parallel-bus system is failed?", "ansGr": [ { "ans": [ "BTB (Bus Tie Breaker) is closed", "true" ] }, { "ans": [ "BTB (Bus Tie Breaker) is opened until main generator is restored", "false" ] }, { "ans": [ "BTB (Bus Tie Breaker) is opened", "false" ] } ] }, { "ch": "What is the condition of BTB (Bus Tie Breaker) in split-bus system?", "ansGr": [ { "ans": [ "Normal open", "true" ] }, { "ans": [ "Normal close", "false" ] }, { "ans": [ "Always close", "false" ] } ] }, { "ch": "How are about generator buses in split-bus & parallel-bus system?", "ansGr": [ { "ans": [ "All generator buses are synchonous to one bus in parallel-bus system", "true" ] }, { "ans": [ "All generator buses are isolated to each other in parallel-bus system", "false" ] }, { "ans": [ "All generator buses are synchonous to one bus in split-bus system", "false" ] } ] }, { "ch": "What is the condition of SSB (Split System Breaker) in split-parallel system?", "ansGr": [ { "ans": [ "Normal close", "true" ] }, { "ans": [ "Always open", "false" ] }, { "ans": [ "Normal open", "false" ] } ] }, { "ch": "Which component following is equipped in the static inverter?", "ansGr": [ { "ans": [ "SCR (Silicon Controlled Rectifier)", "true" ] }, { "ans": [ "Coils", "false" ] }, { "ans": [ "Permanent magnet", "false" ] } ] }, { "ch": "What material is made of rotor in inductor type inverter?", "ansGr": [ { "ans": [ "Soft iron", "true" ] }, { "ans": [ "Permanent magnet", "false" ] }, { "ans": [ "Copper", "false" ] } ] }, { "ch": "What is transformer turns ratio if primary winding is 2 turns & secondary winding is 10 turns?", "ansGr": [ { "ans": [ "0.2", "true" ] }, { "ans": [ "5", "false" ] }, { "ans": [ "0.5", "false" ] } ] }, { "ch": "Which factor does affect to transformer output voltage strength?", "ansGr": [ { "ans": [ "Turns ratio", "true" ] }, { "ans": [ "Core material", "false" ] }, { "ans": [ "Winding materials", "false" ] } ] }, { "ch": "What does transformer loss relate to its coil?", "ansGr": [ { "ans": [ "Copper loss", "true" ] }, { "ans": [ "Eddy current & hysteresis losses", "false" ] }, { "ans": [ "Copper & hysteresis losses", "false" ] } ] }, { "ch": "What may happen if current transformer secondary side is open circuit?", "ansGr": [ { "ans": [ "Overheat may occur", "true" ] }, { "ans": [ "Primary side may be overheat", "false" ] }, { "ans": [ "Nothing affected", "false" ] } ] }, { "ch": "Why does transformer step up for power transmission?", "ansGr": [ { "ans": [ "To reduce line loss", "true" ] }, { "ans": [ "To increase efficiency", "false" ] }, { "ans": [ "To reduce noises", "false" ] } ] }, { "ch": "What is the principle of transistor?", "ansGr": [ { "ans": [ "Current is flown when base-emitter junction is polarized", "true" ] }, { "ans": [ "Current is flown when collector-emitter junction is polarized", "false" ] }, { "ans": [ "Current is flown when base-collector junction is polarized", "false" ] } ] }, { "ch": "What is the important application of SCR (Silicon Controlled Rectifier)?", "ansGr": [ { "ans": [ "Phase control", "true" ] }, { "ans": [ "Current control", "false" ] }, { "ans": [ "Voltage control", "false" ] } ] }, { "ch": "Which one is correct for SCR (Silicon Controlled Rectifier) application?", "ansGr": [ { "ans": [ "High power switching", "true" ] }, { "ans": [ "Integrated circuit switching", "false" ] }, { "ans": [ "Remote control", "false" ] } ] }, { "ch": "Assume C/B is rated 10A and wire gage is 18 respectively. Which wire size is chosen if C/B rate is 11A?", "ansGr": [ { "ans": [ "less then 18", "true" ] }, { "ans": [ "more than 18", "false" ] }, { "ans": [ "18", "false" ] } ] }, { "ch": "What is the autotransformer?", "ansGr": [ { "ans": [ "Primary and secondary are same winding", "true" ] }, { "ans": [ "It's is auto voltage transformer", "false" ] }, { "ans": [ "Primary and secondary are distinguished", "false" ] } ] }, { "ch": "What will technician do if found C/B (Circuit Breaker) is 2nd tripped?", "ansGr": [ { "ans": [ "Troubleshoot must be started", "true" ] }, { "ans": [ "Reset C/B my be used", "false" ] }, { "ans": [ "Replace load", "false" ] } ] }, { "ch": "What is free-trip C/B (Circuit Breaker)?", "ansGr": [ { "ans": [ "C/B can trip open even if the ON-OFF mechanism is held in the ON position", "true" ] }, { "ans": [ "C/B can not trip", "false" ] }, { "ans": [ "C/B can trip open as usual", "false" ] } ] }, { "ch": "Where is DC primary source in large aircraft supplied from?", "ansGr": [ { "ans": [ "AC sources", "true" ] }, { "ans": [ "DC sources through transformer", "false" ] }, { "ans": [ "Battery sources", "false" ] } ] }, { "ch": "What is the standby power bus?", "ansGr": [ { "ans": [ "Bus is used for emergency power when the main sources of power fail", "true" ] }, { "ans": [ "This is hot battery bus", "false" ] }, { "ans": [ "Bus is used when all power sources of power fail", "false" ] } ] }, { "ch": "What is the standby bus?", "ansGr": [ { "ans": [ "It is hot bus directly connected to the main aircraft battery", "true" ] }, { "ans": [ "Bus is used for emergency power when the main sources of power fail", "false" ] }, { "ans": [ "Bus is used when the main sources of power fail", "false" ] } ] }, { "ch": "How to switch to use standby power in case of emergency?", "ansGr": [ { "ans": [ "Manual & automatic switching", "true" ] }, { "ans": [ "Automatic switching", "false" ] }, { "ans": [ "Manual switching", "false" ] } ] }, { "ch": "How is about transformer's output power if supply primary winding with 115V current of 10A?", "ansGr": [ { "ans": [ "Less than 1.15 kW", "true" ] }, { "ans": [ "1150 kW", "false" ] }, { "ans": [ "1150 W", "false" ] } ] }, { "ch": "If generator breaker (GB) is line contactor. How is about auxiliary power breaker (APB)?", "ansGr": [ { "ans": [ "It's contactor", "true" ] }, { "ans": [ "It's circuit breaker", "false" ] }, { "ans": [ "It's relays", "false" ] } ] }, { "ch": "What will happen if two generators connect to one system bus?", "ansGr": [ { "ans": [ "System is collapsed if frequency is not synchronous", "true" ] }, { "ans": [ "System is more stronger", "false" ] }, { "ans": [ "System is redundancy", "false" ] } ] }, { "ch": "What difference between SCR (Silicon Controlled Rectifier) & Shockley diode?", "ansGr": [ { "ans": [ "Shockley diode is added one more gate to be SCR", "true" ] }, { "ans": [ "No difference between Shockley diode and SCR", "false" ] }, { "ans": [ "SCR is added one more gate to be Shockley diode", "false" ] } ] }, { "ch": "What is Shockley diode?", "ansGr": [ { "ans": [ "4-layers diode with 3 junctions", "true" ] }, { "ans": [ "2-layers diode with 1 junction", "false" ] }, { "ans": [ "3-layers diode with 2 junctions", "false" ] } ] }, { "ch": "How is GCU (Generator Control Unit) supplied?", "ansGr": [ { "ans": [ "It's supplied by exciter generator", "true" ] }, { "ans": [ "It's supplied by main generator", "false" ] }, { "ans": [ "It's supplied by battery", "false" ] } ] }, { "ch": "How many volts is for battery if 12 cells connects in series?", "ansGr": [ { "ans": [ "24 volts", "true" ] }, { "ans": [ "12 volts", "false" ] }, { "ans": [ "48 volts", "false" ] } ] }, { "ch": "Which letter \"H\" in current transformer is connected to the source?", "ansGr": [ { "ans": [ "H1", "true" ] }, { "ans": [ "H2", "false" ] }, { "ans": [ "H3", "false" ] } ] }, { "ch": "What is SCR?", "ansGr": [ { "ans": [ "4-layers diode with 3 junctions and 1 gate", "true" ] }, { "ans": [ "2-layers diode with 1 junction and 1 gate", "false" ] }, { "ans": [ "3-layers diode with 2 junctions", "false" ] } ] }, { "part": "M13.6 ATA 25", "ch": "Which emergency equipments must be pressure checked before each flight?", "ansGr": [ { "ans": [ "Life vests, fire extinguishers and oxygen bottles.", "true" ] }, { "ans": [ "Life rafts, fire extinguishers and oxygen bottles.", "false" ] }, { "ans": [ "Life vests, fire extinguishers and smoke hoods.", "false" ] } ] }, { "ch": "Some items regularly considered emergency equipment are:", "ansGr": [ { "ans": [ "First aid kits, megaphones, flashlights.", "true" ] }, { "ans": [ "First aid kits, headsets, flashlights.", "false" ] }, { "ans": [ "First aid kits, megaphones, boomsets.", "false" ] } ] }, { "ch": "Installation and removal procedures of emergency equipments are detailed in:", "ansGr": [ { "ans": [ "Aircraft maintenance manual.", "true" ] }, { "ans": [ "Emergency equipments layout.", "false" ] }, { "ans": [ "Component maintenance manual.", "false" ] } ] }, { "ch": "All emergency lighting has their own independent power supplies:", "ansGr": [ { "ans": [ "Batterries.", "true" ] }, { "ans": [ "Aircraft DC bus.", "false" ] }, { "ans": [ "Aircraft AC bus.", "false" ] } ] }, { "ch": "If the entire electrical system of the aircraft fails,", "ansGr": [ { "ans": [ "Emergency lights will be come on.", "true" ] }, { "ans": [ "Emergency lights will turn off.", "false" ] }, { "ans": [ "Emergency lights remain in their previous condition.", "false" ] } ] }, { "ch": "Captain and first officer seats are:", "ansGr": [ { "ans": [ "Fully adjustable.", "true" ] }, { "ans": [ "Only vertical adjustable.", "false" ] }, { "ans": [ "Only lateral adjustable.", "false" ] } ] }, { "ch": "The captain and first officer's seat belts typically include:", "ansGr": [ { "ans": [ "Shoulder harness and crotch strap.", "true" ] }, { "ans": [ "Shoulder harness and seat belt.", "false" ] }, { "ans": [ "Seat belt and crotch strap.", "false" ] } ] }, { "ch": "In equipment lay- out, Flight Data and Cockpit Voice Recorders, are positioned:", "ansGr": [ { "ans": [ "Near the rear of aircraft.", "true" ] }, { "ans": [ "In the aft cargo compartment", "false" ] }, { "ans": [ "Near the nose of aircraft.", "false" ] } ] }, { "ch": "Which screen is the Cabin entertainment system mounted on the ceiling?", "ansGr": [ { "ans": [ "LCD screens", "true" ] }, { "ans": [ "CRT screens", "false" ] }, { "ans": [ "LED screens", "false" ] } ] }, { "ch": "The seat assembly is fitted:", "ansGr": [ { "ans": [ "Into seat track on the cabin floor.", "true" ] }, { "ans": [ "Into frame on the cabin floor.", "false" ] }, { "ans": [ "Into stringer on the cabin floor.", "false" ] } ] }, { "ch": "Captain and first officer seats are engaged in:", "ansGr": [ { "ans": [ "Floor-mounted tracks.", "true" ] }, { "ans": [ "Frame-mounted tracks.", "false" ] }, { "ans": [ "Cabin floor - mounted tracks.", "false" ] } ] }, { "ch": "Which statemen is CORRECT?", "ansGr": [ { "ans": [ "Emergency lighting batteries are connected to the aircraft's power system under normal conditions.", "true" ] }, { "ans": [ "Emergency lighting batteries are connected to the aircraft's power system in emergency conditions.", "false" ] }, { "ans": [ "Emergency lighting batteries are not connected to the aircraft's power system.", "false" ] } ] }, { "ch": "If a seat belt is not functional and cannot be changed before flight, the seat:", "ansGr": [ { "ans": [ "Must be not used.", "true" ] }, { "ans": [ "Can be used without the seat belt.", "false" ] }, { "ans": [ "Can be used with the infant seat belt.", "false" ] } ] }, { "ch": "Cabin lay-out is the responsibility of:", "ansGr": [ { "ans": [ "Operator.", "true" ] }, { "ans": [ "Maintenance Organization.", "false" ] }, { "ans": [ "Manufacturer.", "false" ] } ] }, { "ch": "Cabin lay-out includes:", "ansGr": [ { "ans": [ "Cabin seats, galleys, bulkheads and lavatories.", "true" ] }, { "ans": [ "Seats, galleys, cockpit and lavatories.", "false" ] }, { "ans": [ "Crew seats, galleys, bulkheads and lavatories.", "false" ] } ] }, { "ch": "Why are the Flight Data and Cockpit Voice Recorders located at the rear of aircraft?", "ansGr": [ { "ans": [ "To ensure the high probability of them being least damaged after any mishaps.", "true" ] }, { "ans": [ "To ensure the lowest vibration.", "false" ] }, { "ans": [ "for easy removal and installation.", "false" ] } ] }, { "ch": "The standard for modern designed IFE equipment:", "ansGr": [ { "ans": [ "Digital data bus.", "true" ] }, { "ans": [ "Analog data bus.", "false" ] }, { "ans": [ "Discrete data bus.", "false" ] } ] }, { "ch": "Management of this IFE system is carried out by the:", "ansGr": [ { "ans": [ "Cabin Crew.", "true" ] }, { "ans": [ "Passenger", "false" ] }, { "ans": [ "Capt & F/O", "false" ] } ] }, { "ch": "What is the first aircraft to integrate fourth-generation IFE systems by using latest standard resolution seat screens?", "ansGr": [ { "ans": [ "Airbus' A350 XWB", "true" ] }, { "ans": [ "Boeing 787-9", "false" ] }, { "ans": [ "Airbus' A321 NEO", "false" ] } ] }, { "ch": "Which statement is CORRECT?", "ansGr": [ { "ans": [ "IFE systems are independent of all other aircraft's power and digital systems.", "true" ] }, { "ans": [ "The IFE system uses the same power source with other systems", "false" ] }, { "ans": [ "The IFE system uses the same digital bus with other systems", "false" ] } ] }, { "ch": "To ensures that any IFE failure cannot affect the function and safety of the aircraft. IFE system must be:", "ansGr": [ { "ans": [ "Isolated from all the other aircraft's systems", "true" ] }, { "ans": [ "Connected to communication system", "false" ] }, { "ans": [ "Used the same power source with other systems", "false" ] } ] }, { "ch": "What materials are used for modern aircraft and fourth generation IFE systems.", "ansGr": [ { "ans": [ "Fibre Optics", "true" ] }, { "ans": [ "Copper wire", "false" ] }, { "ans": [ "Silver wire", "false" ] } ] }, { "ch": "Most of galley use electrical power:", "ansGr": [ { "ans": [ "115 VAC three phase", "true" ] }, { "ans": [ "28VDC", "false" ] }, { "ans": [ "115 VAC one phase", "false" ] } ] }, { "ch": "Each galley is equiped with a control panel including:", "ansGr": [ { "ans": [ "P/B Switchs and Circuit Breakers", "true" ] }, { "ans": [ "Horns and Circuit Breakers", "false" ] }, { "ans": [ "P/B switchs and Timers", "false" ] } ] }, { "part": "M13.7 Flight Controls", "ch": "What are the three primary flight controls used to maneuver an aircraft?", "ansGr": [ { "ans": [ "Elevator, aileron, and rudder.", "true" ] }, { "ans": [ "Flaps, slats, and spoilers.", "false" ] }, { "ans": [ "Trim tabs, servo tabs, and balance tabs.", "false" ] } ] }, { "ch": "Which control surface moves the aircraft up and down (pitch)?", "ansGr": [ { "ans": [ "Elevator.", "true" ] }, { "ans": [ "Rudder.", "false" ] }, { "ans": [ "Aileron.", "false" ] } ] }, { "ch": "What is the function of the ailerons during flight?", "ansGr": [ { "ans": [ "To control the roll (bank) of the aircraft.", "true" ] }, { "ans": [ "To control the pitch (climb and dive).", "false" ] }, { "ans": [ "To control the yaw (left and right turn).", "false" ] } ] }, { "ch": "What does the rudder control in flight?", "ansGr": [ { "ans": [ "Yaw (left and right movement).", "true" ] }, { "ans": [ "Roll (banking movement).", "false" ] }, { "ans": [ "Pitch (up and down movement).", "false" ] } ] }, { "ch": "How does the pilot control the elevator in small airplanes?", "ansGr": [ { "ans": [ "By pulling or pushing the control yoke or stick.", "true" ] }, { "ans": [ "By pressing the rudder pedals.", "false" ] }, { "ans": [ "By adjusting the ailerons.", "false" ] } ] }, { "ch": "Which primary flight control surface is typically controlled by the pilot's foot pedals?", "ansGr": [ { "ans": [ "Rudder.", "true" ] }, { "ans": [ "Elevator.", "false" ] }, { "ans": [ "Aileron.", "false" ] } ] }, { "ch": "What secondary control helps in banking an aircraft by reducing lift on one wing?", "ansGr": [ { "ans": [ "Spoilers.", "true" ] }, { "ans": [ "Rudder.", "false" ] }, { "ans": [ "Elevator.", "false" ] } ] }, { "ch": "What is the purpose of trim tabs on an aircraft?", "ansGr": [ { "ans": [ "To reduce the need for constant control pressure by the pilot.", "true" ] }, { "ans": [ "To increase speed.", "false" ] }, { "ans": [ "To change the direction of the aircraft.", "false" ] } ] }, { "ch": "What type of tabs help the pilot move large control surfaces more easily?", "ansGr": [ { "ans": [ "Servo tabs.", "true" ] }, { "ans": [ "Flaps.", "false" ] }, { "ans": [ "Speed brakes.", "false" ] } ] }, { "ch": "What device is used to control the movement of the elevator without needing constant manual pressure from the pilot?", "ansGr": [ { "ans": [ "Trim tabs.", "true" ] }, { "ans": [ "Spoilers.", "false" ] }, { "ans": [ "Ailerons.", "false" ] } ] }, { "ch": "What is the function of servo tabs on large aircraft?", "ansGr": [ { "ans": [ "To help move and hold the main control surface in position.", "true" ] }, { "ans": [ "To increase the speed of the aircraft.", "false" ] }, { "ans": [ "To decrease drag.", "false" ] } ] }, { "ch": "Which control system assists the pilot during takeoff and landing by increasing lift?", "ansGr": [ { "ans": [ "Flaps.", "true" ] }, { "ans": [ "Rudder.", "false" ] }, { "ans": [ "Spoilers.", "false" ] } ] }, { "ch": "What high lift device increases the surface area of the wing during takeoff and landing?", "ansGr": [ { "ans": [ "Flaps.", "true" ] }, { "ans": [ "Rudder.", "false" ] }, { "ans": [ "Servo tabs.", "false" ] } ] }, { "ch": "What are spoilers used for on an aircraft?", "ansGr": [ { "ans": [ "To assist in roll control and reduce lift.", "true" ] }, { "ans": [ "To increase lift during takeoff.", "false" ] }, { "ans": [ "To steer the aircraft left and right.", "false" ] } ] }, { "ch": "How are the primary flight controls in a modern airplane typically operated from the flight deck?", "ansGr": [ { "ans": [ "By a control stick, yoke, or joystick.", "true" ] }, { "ans": [ "By a touch screen display.", "false" ] }, { "ans": [ "By voice commands.", "false" ] } ] }, { "ch": "What is the function of the aileron during a left bank maneuver?", "ansGr": [ { "ans": [ "The left aileron rises, and the right aileron descends.", "true" ] }, { "ans": [ "The left aileron descends, and the right aileron rises.", "false" ] }, { "ans": [ "Both ailerons rise together.", "false" ] } ] }, { "ch": "Why do some aircraft use multiple ailerons, including inboard and outboard ailerons?", "ansGr": [ { "ans": [ "To enhance lateral control during high-speed flight.", "true" ] }, { "ans": [ "To increase longitudinal control.", "false" ] }, { "ans": [ "To improve takeoff performance.", "false" ] } ] }, { "ch": "How does the application of rudder and ailerons create a coordinated turn?", "ansGr": [ { "ans": [ "By using the proper proportion of rudder and aileron inputs.", "true" ] }, { "ans": [ "By only applying rudder input.", "false" ] }, { "ans": [ "By using spoilers instead of rudder.", "false" ] } ] }, { "ch": "How do secondary flight controls enhance the operation of an aircraft during landing?", "ansGr": [ { "ans": [ "By providing aerodynamic braking.", "true" ] }, { "ans": [ "By reducing drag.", "false" ] }, { "ans": [ "By increasing engine thrust.", "false" ] } ] }, { "ch": "What happens to the flight spoilers on the wing when the aileron is deflected upward?", "ansGr": [ { "ans": [ "The spoilers rise on the same side as the aileron.", "true" ] }, { "ans": [ "The spoilers retract into the wing.", "false" ] }, { "ans": [ "The spoilers rise on the opposite side of the aileron.", "false" ] } ] }, { "ch": "How do trim tabs assist in controlling an aircraft?", "ansGr": [ { "ans": [ "By reducing the physical pressure required on the primary flight controls.", "true" ] }, { "ans": [ "By increasing the speed of the aircraft.", "false" ] }, { "ans": [ "By changing the airflow over the wings.", "false" ] } ] }, { "ch": "What is the primary function of servo tabs in large aircraft?", "ansGr": [ { "ans": [ "To aid in moving the main control surface and holding it in position.", "true" ] }, { "ans": [ "To reduce the aircraft’s weight.", "false" ] }, { "ans": [ "To increase aerodynamic drag.", "false" ] } ] }, { "ch": "What is the advantage of using active load control systems?", "ansGr": [ { "ans": [ "They reduce the focus of loads on the wings during maneuvers.", "true" ] }, { "ans": [ "They increase engine performance.", "false" ] }, { "ans": [ "They improve the overall speed of the aircraft.", "false" ] } ] }, { "ch": "How do roll maneuver load alleviation (RMLA) systems work?", "ansGr": [ { "ans": [ "By moderating the deflection of outboard ailerons during rolls.", "true" ] }, { "ans": [ "By increasing the aileron deflection for faster rolls.", "false" ] }, { "ans": [ "By locking the rudder in place during rolls.", "false" ] } ] }, { "ch": "How do high lift devices improve aircraft performance?", "ansGr": [ { "ans": [ "By increasing lift during takeoff and landing.", "true" ] }, { "ans": [ "By reducing the aircraft’s weight.", "false" ] }, { "ans": [ "By increasing fuel efficiency during cruise.", "false" ] } ] }, { "ch": "How do slats and slots increase lift at low airspeeds?", "ansGr": [ { "ans": [ "By allowing air to flow between the slat and the wing leading edge.", "true" ] }, { "ans": [ "By retracting into the wing.", "false" ] }, { "ans": [ "By increasing the size of the trailing edge.", "false" ] } ] }, { "ch": "How do speed brakes assist in landing an aircraft?", "ansGr": [ { "ans": [ "By decreasing lift and increasing drag.", "true" ] }, { "ans": [ "By increasing thrust.", "false" ] }, { "ans": [ "By controlling the pitch of the aircraft.", "false" ] } ] }, { "ch": "What system provides feedback to the pilot to simulate the control forces felt during flight?", "ansGr": [ { "ans": [ "Artificial feel system.", "true" ] }, { "ans": [ "Secondary flight controls.", "false" ] }, { "ans": [ "Rudder limiter.", "false" ] } ] }, { "ch": "What device prevents large rudder deflections at high speeds?", "ansGr": [ { "ans": [ "Rudder limiter.", "true" ] }, { "ans": [ "Aileron control.", "false" ] }, { "ans": [ "Elevator trim.", "false" ] } ] }, { "ch": "Why is a hydraulic control system necessary in modern aircraft?", "ansGr": [ { "ans": [ "To assist the pilot in overcoming aerodynamic forces at high speeds.", "true" ] }, { "ans": [ "To reduce the overall weight of the aircraft.", "false" ] }, { "ans": [ "To prevent stalls during flight.", "false" ] } ] }, { "ch": "How does a hydromechanical flight control system transmit pilot inputs?", "ansGr": [ { "ans": [ "Through servo valves that direct hydraulic fluid to actuators.", "true" ] }, { "ans": [ "Through electrical signals to hydraulic pumps.", "false" ] }, { "ans": [ "Through direct mechanical linkage to the control surfaces.", "false" ] } ] }, { "ch": "What are balance panels in aircraft control systems used for?", "ansGr": [ { "ans": [ "To assist in the movement of control surfaces by using pressure differentials.", "true" ] }, { "ans": [ "To balance the weight of the aircraft during flight.", "false" ] }, { "ans": [ "To reduce aerodynamic drag during takeoff.", "false" ] } ] }, { "ch": "What role do artificial feel systems play in modern aircraft with hydraulic controls?", "ansGr": [ { "ans": [ "They provide feedback to the pilot about the control input.", "true" ] }, { "ans": [ "They reduce the force needed to control the aircraft.", "false" ] }, { "ans": [ "They increase the speed of the control surfaces.", "false" ] } ] }, { "ch": "How does an artificial feel system simulate the resistance of a mechanical control system?", "ansGr": [ { "ans": [ "By using spring-loaded rollers and cams.", "true" ] }, { "ans": [ "By increasing the hydraulic pressure.", "false" ] }, { "ans": [ "By reducing the control surface deflection.", "false" ] } ] }, { "ch": "What is the primary function of a yaw damper system in large aircraft?", "ansGr": [ { "ans": [ "To counter the rolling tendency during flight and stabilize the aircraft.", "true" ] }, { "ans": [ "To reduce drag and improve fuel efficiency.", "false" ] }, { "ans": [ "To increase the speed of the aircraft during takeoff.", "false" ] } ] }, { "ch": "What is the purpose of Mach trim in high-speed aircraft?", "ansGr": [ { "ans": [ "To counteract Mach tuck and maintain level flight.", "true" ] }, { "ans": [ "To increase the aircraft's speed.", "false" ] }, { "ans": [ "To improve the efficiency of the engines.", "false" ] } ] }, { "ch": "How does Mach trim automatically maintain a level attitude at high speeds?", "ansGr": [ { "ans": [ "By trimming the nose up as Mach tuck occurs.", "true" ] }, { "ans": [ "By increasing the rudder deflection.", "false" ] }, { "ans": [ "By reducing the aileron deflection.", "false" ] } ] }, { "ch": "How do redundant Mach trim systems ensure safety during flight?", "ansGr": [ { "ans": [ "By automatically switching to a backup system if the primary system fails.", "true" ] }, { "ans": [ "By allowing the pilot to manually override the system.", "false" ] }, { "ans": [ "By reducing the aircraft’s speed during descent.", "false" ] } ] }, { "ch": "How do rudder limiters prevent structural damage at high speeds?", "ansGr": [ { "ans": [ "By reducing rudder deflection as speed increases.", "true" ] }, { "ans": [ "By increasing rudder deflection at high speeds.", "false" ] }, { "ans": [ "By locking the rudder in place during high-speed flight.", "false" ] } ] }, { "ch": "Why are gust dampers used in hydraulic power control units?", "ansGr": [ { "ans": [ "To protect flight control surfaces from wind damage.", "true" ] }, { "ans": [ "To lock the control surfaces during flight.", "false" ] }, { "ans": [ "To reduce drag during takeoff.", "false" ] } ] }, { "ch": "How does the stick shaker warning system alert the crew of an impending stall?", "ansGr": [ { "ans": [ "By providing a violent shaking motion to the control yoke.", "true" ] }, { "ans": [ "By triggering an aural warning sound.", "false" ] }, { "ans": [ "By reducing the aircraft's speed.", "false" ] } ] }, { "ch": "What is the function of the stick nudger or pusher in stall warning systems?", "ansGr": [ { "ans": [ "To apply a nose-down input to avoid a stall.", "true" ] }, { "ans": [ "To increase the angle of attack during takeoff.", "false" ] }, { "ans": [ "To warn the crew of an engine failure.", "false" ] } ] }, { "ch": "What is the primary role of angle of attack sensors in stall warning systems?", "ansGr": [ { "ans": [ "To measure the angle of the aircraft relative to the airflow.", "true" ] }, { "ans": [ "To increase the aircraft's speed during descent.", "false" ] }, { "ans": [ "To reduce drag during turns.", "false" ] } ] }, { "ch": "How does a heater in angle of attack sensors enhance safety?", "ansGr": [ { "ans": [ "By preventing ice build-up that could affect sensor accuracy.", "true" ] }, { "ans": [ "By increasing airflow over the sensor.", "false" ] }, { "ans": [ "By reducing the weight of the sensor.", "false" ] } ] }, { "ch": "What triggers the unsafe takeoff configuration warning?", "ansGr": [ { "ans": [ "When the throttle is advanced and a problem is detected.", "true" ] }, { "ans": [ "When the aircraft exceeds a critical speed.", "false" ] }, { "ans": [ "When the landing gear is not retracted.", "false" ] } ] }, { "ch": "What happens when the landing gear is not locked in the down position during landing?", "ansGr": [ { "ans": [ "A landing configuration warning is given.", "true" ] }, { "ans": [ "The aircraft's speed is reduced.", "false" ] }, { "ans": [ "The rudder is locked in place.", "false" ] } ] }, { "ch": "How do fly-by-wire systems improve aircraft performance?", "ansGr": [ { "ans": [ "By reducing the weight of the control system and providing more precise control.", "true" ] }, { "ans": [ "By increasing the number of manual controls for the pilot.", "false" ] }, { "ans": [ "By reducing fuel consumption during flight.", "false" ] } ] }, { "ch": "What is the function of sidestick controllers in a fly-by-wire system?", "ansGr": [ { "ans": [ "To convert pilot inputs into electrical signals.", "true" ] }, { "ans": [ "To manually control the ailerons and elevators.", "false" ] }, { "ans": [ "To operate the hydraulic pumps.", "false" ] } ] }, { "ch": "How do fly-by-wire systems help prevent dangerous maneuvers in modern aircraft?", "ansGr": [ { "ans": [ "By limiting control inputs that could lead to stalling or overspeed conditions.", "true" ] }, { "ans": [ "By automatically increasing engine thrust during critical phases of flight.", "false" ] }, { "ans": [ "By reducing the weight of the aircraft.", "false" ] } ] }, { "ch": "How do fly-by-wire systems contribute to increased safety in unstable military aircraft?", "ansGr": [ { "ans": [ "By automatically adjusting control surfaces to maintain stability.", "true" ] }, { "ans": [ "By reducing the speed of the aircraft during high-speed maneuvers.", "false" ] }, { "ans": [ "By increasing the roll rate for faster turns.", "false" ] } ] }, { "ch": "How do fly-by-wire systems adjust flight control movements for changing aerodynamic conditions?", "ansGr": [ { "ans": [ "By using computers to ensure consistent aircraft response.", "true" ] }, { "ans": [ "By reducing the pilot's control input.", "false" ] }, { "ans": [ "By limiting the aircraft’s speed during high-altitude flights.", "false" ] } ] }, { "ch": "How does fly-by-wire redundancy ensure safety in flight control systems?", "ansGr": [ { "ans": [ "By using multiple independent computers and hydraulic actuators to perform the same functions.", "true" ] }, { "ans": [ "By allowing the pilot to manually control the aircraft in case of system failure.", "false" ] }, { "ans": [ "By using electrical signals to bypass hydraulic controls.", "false" ] } ] }, { "ch": "How does the solenoid valve affect the servo control in active mode?", "ansGr": [ { "ans": [ "It lets in high-pressure flow to activate the system.", "true" ] }, { "ans": [ "It closes the return line to reduce system pressure.", "false" ] }, { "ans": [ "It opens the pressure line to increase actuator speed.", "false" ] } ] }, { "ch": "What happens to the servo control system in the damping mode?", "ansGr": [ { "ans": [ "The actuator chambers are interconnected through a damping orifice.", "true" ] }, { "ans": [ "The hydraulic pressure is increased to speed up the control response.", "false" ] }, { "ans": [ "The electrical signals are bypassed to reduce system load.", "false" ] } ] }, { "ch": "What role does the pressure line closing valve play in fly-by-wire hydraulic systems?", "ansGr": [ { "ans": [ "It isolates the servo control from the hydraulic system in case of failure.", "true" ] }, { "ans": [ "It increases the hydraulic pressure for faster control response.", "false" ] }, { "ans": [ "It allows hydraulic fluid to bypass the control surfaces.", "false" ] } ] }, { "ch": "How does fly-by-optics improve data transfer in flight control systems?", "ansGr": [ { "ans": [ "By allowing faster data transfer and reducing electrical interference.", "true" ] }, { "ans": [ "By increasing the number of manual controls for the pilot.", "false" ] }, { "ans": [ "By reducing the number of hydraulic actuators needed.", "false" ] } ] }, { "ch": "What is one benefit of fly-by-wireless systems compared to fly-by-wire?", "ansGr": [ { "ans": [ "Reduced weight and maintenance requirements.", "true" ] }, { "ans": [ "Increased manual control for the pilot.", "false" ] }, { "ans": [ "Improved fuel efficiency during takeoff.", "false" ] } ] }, { "ch": "What are gust locks used for in a mechanical flight control system?", "ansGr": [ { "ans": [ "To prevent external forces from moving the control surfaces while the aircraft is parked.", "true" ] }, { "ans": [ "To reduce the weight of the aircraft.", "false" ] }, { "ans": [ "To control the movement of flaps during landing.", "false" ] } ] }, { "ch": "Why do control cables require tension regulators?", "ansGr": [ { "ans": [ "To maintain proper cable tension during temperature changes.", "true" ] }, { "ans": [ "To increase the strength of the cables.", "false" ] }, { "ans": [ "To reduce the number of cables needed.", "false" ] } ] }, { "ch": "How do push-pull rods differ from control cables in their function?", "ansGr": [ { "ans": [ "Push-pull rods transmit force in both directions, while cables only transmit force under tension.", "true" ] }, { "ans": [ "Push-pull rods are used only for landing gear, while cables control flight surfaces.", "false" ] }, { "ans": [ "Push-pull rods are heavier but stronger than cables.", "false" ] } ] }, { "ch": "How do bellcranks change the direction of movement in a control system?", "ansGr": [ { "ans": [ "By receiving input from one direction and providing output in another direction.", "true" ] }, { "ans": [ "By reducing the force needed to move control surfaces.", "false" ] }, { "ans": [ "By locking the control surfaces in place.", "false" ] } ] }, { "ch": "What type of motion does a torque tube apply in a flight control system?", "ansGr": [ { "ans": [ "Torsional (rotating) motion.", "true" ] }, { "ans": [ "Longitudinal motion.", "false" ] }, { "ans": [ "Vertical motion.", "false" ] } ] }, { "ch": "What is the primary reason cables are widely used in mechanical flight control systems?", "ansGr": [ { "ans": [ "Structural deflections do not affect their operation", "true" ] }, { "ans": [ "They are less expensive than push-pull rods", "false" ] }, { "ans": [ "They are easy to disconnect during maintenance", "false" ] } ] }, { "ch": "What component prevents damage to control surfaces while the aircraft is parked?", "ansGr": [ { "ans": [ "Gust lock", "true" ] }, { "ans": [ "Bell crank", "false" ] }, { "ans": [ "Control snubber", "false" ] } ] }, { "ch": "In which type of aircraft is a purely mechanical flight control system most commonly used today?", "ansGr": [ { "ans": [ "Smaller aircraft", "true" ] }, { "ans": [ "Wide-body airliners", "false" ] }, { "ans": [ "Supersonic jets", "false" ] } ] }, { "ch": "Which of the following is a mechanical control component used to change direction of force?", "ansGr": [ { "ans": [ "Bell crank", "true" ] }, { "ans": [ "Gust lock", "false" ] }, { "ans": [ "Cable guide", "false" ] } ] }, { "ch": "Which of the following components can transfer motion without being affected by structure bending?", "ansGr": [ { "ans": [ "Control cables", "true" ] }, { "ans": [ "Torque tubes", "false" ] }, { "ans": [ "Push-pull rods", "false" ] } ] }, { "ch": "What is the main function of torque tubes in mechanical flight control systems?", "ansGr": [ { "ans": [ "Transmit rotational movement", "true" ] }, { "ans": [ "Prevent cable over-tension", "false" ] }, { "ans": [ "Lock the surface during gusts", "false" ] } ] }, { "ch": "What type of load are control cables designed to resist effectively?", "ansGr": [ { "ans": [ "Tensile", "true" ] }, { "ans": [ "Shear", "false" ] }, { "ans": [ "Compressive", "false" ] } ] }, { "ch": "What is the main function of the collective pitch control in a helicopter?", "ansGr": [ { "ans": [ "It varies the pitch of all main rotor blades equally", "true" ] }, { "ans": [ "It changes blade pitch individually based on rotor position", "false" ] }, { "ans": [ "It rotates the tail rotor blades to change yaw", "false" ] } ] }, { "ch": "What happens to rotor RPM when collective pitch is increased?", "ansGr": [ { "ans": [ "RPM decreases", "true" ] }, { "ans": [ "RPM remains unchanged", "false" ] }, { "ans": [ "RPM increases", "false" ] } ] }, { "ch": "What must be adjusted to maintain constant rotor RPM when pitch increases?", "ansGr": [ { "ans": [ "Throttle or power input", "true" ] }, { "ans": [ "Blade length", "false" ] }, { "ans": [ "Rotor diameter", "false" ] } ] }, { "ch": "What is the primary effect of the cyclic pitch control in a helicopter?", "ansGr": [ { "ans": [ "Tilts the rotor disc to control horizontal movement", "true" ] }, { "ans": [ "Changes collective pitch equally on all blades", "false" ] }, { "ans": [ "Adjusts tail rotor thrust for yaw control", "false" ] } ] }, { "ch": "How does the cyclic pitch control move the helicopter forward?", "ansGr": [ { "ans": [ "Tilts rotor disc forward", "true" ] }, { "ans": [ "Tilts rotor disc backward", "false" ] }, { "ans": [ "Tilts rotor disc laterally", "false" ] } ] }, { "ch": "What causes the rotor disc to tilt in the desired direction?", "ansGr": [ { "ans": [ "Gyroscopic precession and blade pitch variation", "true" ] }, { "ans": [ "Tail rotor torque", "false" ] }, { "ans": [ "Anti-torque pedals", "false" ] } ] } ]