Câu 1: In the parallel operation, what is task of regulations function of generator control unit (GCU)

• a) Ensure that all generators share the same load and synchronise power sources before a generator power source can be switched into parallel to another power source
• b) Ensure that all generators share the same load
• c) Synchronise power sources before a generator power source can be switched into parallel to another power source

Câu 2: How does a circuit breaker work

• a) When the actual current exceeds the maximum permitted current, the temperature of the bimetal increases and starts bending so the electrical circuit is opened
• b) When the actual current exceeds the maximum permitted current, the resistance of the bimetal increases and a circuit detect increasing to open electrical circuit.
• c) When the actual current exceeds the maximum permitted current, the magnetic field increases and moves the armature and the contacts to open electrical circuit

Câu 3: What happen if constant speed drive (CSD) is disconnect while the input speed is too low (not stop).

• a) The centrifugal force cannot open the clutch completely, this can lead to a clutch damage, such as broken teeth.
• b) CSD is disconnect as normal
• c) Worm gear can be damaged

Câu 4: The nose cap of the leading edge structure is made of

• a) Stainless steel alloy
• b) Aluminum alloy
• c) Titanium alloy

Câu 5: What does main AC power distribution consists of

• a) Bus, power source switching and bus tie switching
• b) Generator, bus, power source switching and bus tie switching
• c) Generator, GCU, bus, power source switching and bus tie switching

Câu 6: Which part has function to transfer directly the pressure load from the skin to the frame?

• a) Stringer
• b) Clip
• c) Longegron

Câu 7: On an aircraft equipped with an electrical flight control system, why must MAIN DC power distribution always work in isolated operation

• a) To prevents a single failure such as a short circuit, from affecting the complete flight control system all at once.
• b) To save energy
• c) To prevents an overload of the power source.

Câu 8: Concerning over-limit current, which component protect generator feeder lines

• a) Fuses or circuit breakers
• b) A breaker or fuse is installed
• c) The electronic circuits of the generator control unit (GCU)

Câu 9: What is purpose of the bus tie switching

• a) Provides a connection between the two busses, between the two source (only parallel operation)
• b) Provides a connection between the two busses, between the two source (only isolated operation)
• c) Provides a connection between the two busses, between the two source

Câu 10: How to switch breaker from the closed state to open/ trip state

• a) Interrupt current flow the coil
• b) A short pulse is fed to the coil in the opposite direction
• c) A short pulse is fed to the second coil

Câu 11: Artificial feel is gained by using a

• a) Spring bias unit.
• b) Hydraulic damper.
• c) 'feel' generator.

Câu 12: The primary flight controls are

• a) The ailerons and elevator
• b) The ailerons and roll spoiler, elevator and rudder
• c) The ailerons, elevator and rudder

Câu 13: "If hydraulic pressure is removed from a spoiler system, the spoiler panels

• a) Go to down if any are not already down.
• b) Go to full up.
• c) Remain where they are.

Câu 14: During an autopilot controlled turn

• a) Ailerons, rudder and THS will move.
• b) Ailerons and rudder will move.
• c) Ailerons, rudder and roll spoilers will move.

Câu 15: How Ram Air Turbine driven emergency generator

• a) Generates the hydraulic power needed for the hydraulically driven
• b) Drives the emergency generator directly
• c) Either generates the hydraulic power needed for the hydraulically driven emergency generator or drives the emergency generator directly

Câu 16: Concerning isolated operation, what is main purpose of bus tie push button.

• a) Switch off all power source
• b) Prevent bus tie switching in case of smoke in the cockpit generated by a short circuit.
• c) Switch off all AC power source

Câu 17: In normal flight, if the control column is pulled back, the elevator will

• a) Move up.
• b) Move down.
• c) No change

Câu 18: The temperature within the cabin of the aircraft is normally maintained at.

• a) 18ºC to 24ºC.
• b) 12ºC to 18ºC.
• c) 18ºC to 30ºC.

Câu 19: When is parallel operation allowed

• a) Generators have the same voltage and frequency and phase angle.
• b) Generators have the same voltage and frequency
• c) Generators have the same voltage and frequency and power

Câu 20: A normal shock wave takes place at Mach

• a) 1.2
• b) 2.1
• c) 1.3

Câu 21: Rudder trim is controlled by the

• a) Rudder trim computer.
• b) Electric flight control unit.
• c) Flight Guidance and Management Computer.

Câu 22: A stick shaker operates

• a) Just before the stall.
• b) After the stall.
• c) At the onset of the stall.

Câu 23: Where is the keel beam located?

• a) Through the center wing section of the fuselage
• b) Through the aft wing section of the fuselage
• c) Through the mid section of the fuselage

Câu 24: The two switches for pitch trim are located

• a) On the captain’s and the first officer’s control wheels acting like an 'AND' switch.
• b) On the control column with the captain having priority over the First Officer.
• c) On the control column acting like an 'OR' switch.

Câu 25: How many modes does the cabin pressurization system usually work?

• a) 2
• b) 3
• c) 4

Câu 26: How does a fuse work

• a) Like a shear pin in a mechanical linkage
• b) Like a rigging pin in a mechanical linkage
• c) Like a safety pin in a mechanical linkage

Câu 27: Differential aileron control will

• a) Prevent yawing in conjunction with rudder input.
• b) Cause a nose down moment.
• c) Cause a nose up moment.

Câu 28: When is automatic load shedding available

• a) An overload of generators is detected while aircraft in flight
• b) An overload of generators is detected or must be prevented by the system
• c) An overload of generators is detected or bus is overheat.

Câu 29: What is fitted on the aircraft to enable the pilot to reduce his speed rapidly in event of severe turbulence, or speed tending to rise above the Never Exceed Limit?

• a) Wheel brakes.
• b) Speed brakes.
• c) Lift dumpers.

Câu 30: How many fire types?

• a) 4
• b) 3
• c) 2

Câu 31: The bulk cargo door is different from the other cargo doors; it opens?

• a) Inwards and is operated manually
• b) Outwards and is operated manually
• c) Inwards and is operated electrically

Câu 32: Why is use of slip rings and brushes for current transferring not used on aircraft generators

• a) It has a low reliability and produces sparks.
• b) It has a high reliability but produces sparks.
• c) It don't produces sparks but has low reliability.

Câu 33: Why the over-limit current must be prevented

• a) A over-limit current is caused by a short circuit or faulty consumer and can overheat the wire and generate a fire.
• b) For energy saving
• c) To increase life of component

Câu 34: The aft pylon attach fittings transmit

• a) Weight and longitudinal loads
• b) Lateral loads and longitudinal loads
• c) Weight and lateral loads

Câu 35: To avoid moments bending the root of the wing, the aircraft will be fitted with

• a) Integrated fuel monitoring system.
• b) Load Alleviation Function system
• c) Automatic trim control for controlled turns and rudder movements.

Câu 36: The maximum rudder deflection changes with

• a) Airspeed.
• b) Flap position.
• c) Altitude.

Câu 37: The positive cabin rate should not exceed

• a) 300 ft/min
• b) 400 ft/min
• c) 500 ft/min

Câu 38: Which windows can be used as flight crew emergency exits

• a) Side windows
• b) Cabin windows
• c) Windshields

Câu 39: Which process is the most important treatment for aluminium alloys

• a) Anodizing process
• b) Alodizing process
• c) Cleaning process

Câu 40: If an aircraft is entering a turn to the left, what input to rudder crossfeed be?

• a) Right Rudder.
• b) No Rudder.
• c) Left Rudder.

Câu 41: On a full fly-by-wire system, a speedbrake screwjack servomotor is controlled by the

• a) Flight augmentation computer.
• b) Flight control computer.
• c) Flight management and guidance computer.

Câu 42: How to hold the contacts of contactor in the closed state

• a) A DC current flow the coil continuously
• b) Only a short current pulse
• c) A latching device, normally a permanent magnet, is used

Câu 43: What type of the fire or overheat detection sensors?

• a) Continuous and parallel loops
• b) Parallel loops
• c) Continuous loops

Câu 44: What is electrical emergency power source

• a) Battery and ram air turbine
• b) Battery
• c) Battery and emergency generator

Câu 45: On A/C has slotted flaps, when the flaps extend the slots allow

• a) Air from the lower side of the wing to flow to the upper side to prevent an early flow separation
• b) Air from the upper side of the wing to flow to the lower side to prevent and early flow separation
• c) Air from the lower side of the wing to flow to the upper side to prevent and a late flow separation

Câu 46: Excessive wear on one sides of the control cable pulley groove is evidence of

• a) Excessive cable tension.
• b) Pulley misalignment.
• c) Cable misalignment.

Câu 47: Which electrical power is generated by emergency generator

• a) DC
• b) One phase AC
• c) Three phase AC

Câu 48: What is primary structure

• a) Primary structure is that structure which contributes significantly to carrying flight, ground and pressurization loads.
• b) Primary structure is that structure which carries only air or inertial loads generated on or within the secondary structure.
• c) Primary structure is that structure which contributes significantly to carrying flight and pressurization loads

Câu 49: On Airbus aircraft, a piano hinge connects the cargo door to the fuselage

• a) At the bottom of cargo door
• b) At the top of cargo door
• c) At the center of cargo door

Câu 50: Pitch is the nose up - nose down motion around the

• a) Vertical axis.
• b) Longitudinal axis.
• c) Lateral axis

Câu 51: The aircraft windows are:

• a) The cockpit windows and the observer windows
• b) The cockpit windows and the cabin windows
• c) The cockpit windows, the cabin windows and the observer windows

Câu 52: How is hot battery bus connected to the battery

• a) Batteries must be switched off
• b) It is always connected directly
• c) Batteries must be switched on

Câu 53: When spoilers are used asymmetrically, they combine with

• a) Ailerons.
• b) Elevators.
• c) Rudder.

Câu 54: The bypass valve is fully opened and the ram air doors are nearly closed for what purpose?

• a) For maximum heating
• b) For maximum cooling
• c) For depressurizing cabin pressure

Câu 55: Which is not true about semi-monocoque structure

• a) The semi-monocoque fuselage is constructed primarily of the alloys of aluminium, although steel and titanium are found in areas of high temperatures.
• b) The bulkheads, frames, stringers and longerons facilitate the design and construction of a streamlined fuselage, and add to the strength and rigidity of the structure.
• c) All the strength of the structure is carried in the outside skin.

Câu 56: The door structure consists of

• a) The door frame, beams and intercostals
• b) The door frame, beams, formers and intercostals
• c) The door frame, formers and intercostals

Câu 57: How to prevent an accidental deployment of the RAT

• a) A circuit is used to inhibit deployment of the RAT on ground
• b) The manual ON pushbutton is guarded
• c) Deployment of the RAT is only performed when the manual ON pushbutton is press and hold for 10 second

Câu 58: Ruddervators when moved, will move

• a) Either opposite each other or together, depending on the selection.
• b) Together only.
• c) Opposite to each other only.

Câu 59: How many class of cargo and baggage component?

• a) 4
• b) 5
• c) 6

Câu 60: Which structure member carry and distribute different loads of the fuselage

• a) Bulkhead
• b) Stringer
• c) Skin

Câu 61: In flight, if Pack 2 Inop then

• a) The outflow valves are driven to a more open position
• b) The outflow valves are stay the same
• c) The outflow valves are driven to a more closed position

Câu 62: How to check the position of the equipment cooling system

• a) By look at the valve position
• b) By check the indication on display unit in cockpit
• c) By look at the valve position and check the indication on display unit in cockpit

Câu 63: Cabin pressure is maintained by.

• a) Controlling the output of the compressor.
• b) Controlling the supply of air to the cabin.
• c) Controlling the amount of air discharged from the cabin.

Câu 64: If the cabin altitude increases above normal values, according to the flight altitude

• a) The passenger will get the oxygen mask first
• b) The flight crew will get the oxygen mask first
• c) The flight crew and passenger get oxygen mask at the same time

Câu 65: An air cycle machine turbine.

• a) Drives compressor to increase temperature.
• b) Drives compressor to decrease temperature.
• c) Drives compressor to pressurize aircraft.

Câu 66: The overhead hatch provides an emergency exit for

• a) The passengers from the cockpit
• b) The flight crew from the cockpit
• c) The flight crew from the cabin

Câu 67: During turn coordination rudder co-operates with

• a) Ailerons
• b) Ailerons and elevators
• c) Ailerons and roll spoilers

Câu 68: How is large load shedded

• a) Automatic or manually
• b) Automatic on ground or manually
• c) Automatic in flight

Câu 69: When is an automatic bus tie switching in parallel operation performed.

• a) A serious problem in the distribution like a short circuit is detected or during landing
• b) A serious problem in the distribution like a short circuit is detected or during automatic landing
• c) A serious problem in the distribution like a short circuit is detected

Câu 70: Concerning isolated operation, what happen if one generator supplies the complete electrical power distribution.

• a) An automatic load shedding occurs
• b) Nothing happened
• c) An manual load shedding must be taken place

Câu 71: The door is supported by

• a) The support arm
• b) The guide arms
• c) The support arm and the guide arms

Câu 72: What happen to a nickel cadmium battery when it is overheated during charging with constant voltage charging method

• a) The battery output voltage increases that result in a thermal runaway
• b) The battery output voltage reduce that result in a thermal runaway
• c) The battery output voltage do not change

Câu 73: The purpose of cable tension regulators is to

• a) Keep tension of the cable roughly constant at different temperatures
• b) Compensate for low temperature only.
• c) Compensate for high temperature only.

Câu 74: In case of emergency, which doors can be used as emergency exit doors for a quick passenger and crew evacuation?

• a) Cargo doors
• b) Service doors
• c) Main entry doors

Câu 75: Which is correct about “safe-life” design principle?

• a) The safe-life design principle requires that major structural elements be replaced after a fixed number of flight cycles.
• b) These parts can be repaired or refurbished to extend the components life
• c) This method relies upon a duplication of certain structural members to ensure that if one member failed, the other would assume the load of the failed member.

Câu 76: How are spoilers normally operated?

• a) Electrical motors.
• b) Hydraulic actuator.
• c) Air pistons.

Câu 77: Gust Load Alleviation Function system used to

• a) Prevents extreme wing bending during gusts and decreases wing structure load
• b) Prevents extreme wing bending during gusts
• c) Decreases wing structure load

Câu 78: A stick shaker is a device which

• a) Helps extricate an aircraft from soft ground.
• b) Gives a short period of extra lift to assist take off.
• c) Vibrates the control column near stalling speed.

Câu 79: When the control column is moved back and the hand-wheel turned to the left

• a) The elevators move down and the left aileron moves down.
• b) The left aileron moves up and the elevators move up.
• c) The elevators move up and the left aileron moves down.

Câu 80: How is ground power source switching performed

• a) Always manually
• b) Always automatically
• c) Either automatically or manually

Câu 81: How many factors of fire?

• a) 1
• b) 3
• c) 2

Câu 82: Forward and backward movement of the side stick is used for pitch control by

• a) The elevators
• b) The ailerons
• c) The rudder

Câu 83: Why must large loads be shed or switched off before we switch any power source on or off on the ground

• a) Reduce interrupt time
• b) Save energy.
• c) Improves the reliability of the power relays and prevents an overload of the power source.

Câu 84: What component/area has an automatic fire extinguisher system?

• a) Engine
• b) APU
• c) MLG bay

Câu 85: In parallel operation, how are generators are synchronized

• a) Manually controlled
• b) Automatically controlled by logic circuit
• c) Automatically controlled and monitored by the generator control units

Câu 86: The aircraft is controlled about the vertical axis by the

• a) Elevator.
• b) Ailerons.
• c) Rudder.

Câu 87: Which power sources does the emergency power distribution is normally supplied from

• a) The same power sources as the essential power distribution or emergency power sources
• b) Emergency power sources
• c) Battery

Câu 88: How to prevent the problems of power interruption when AC power source switching is performed from one power source to another one which is not allowed to work in parallel

• a) AC power sources is convert to DC, supply converted DC power source in parallel, switch off old power source.
• b) A synchronization of the two different power sources is started before switching
• c) Power interruption don't need prevent

Câu 89: With respect to flight spoilers, they.

• a) Can operate both on the ground and in flight.
• b) Only operate on the ground.
• c) Only operate in flight.

Câu 90: How many type of aircraft fuselage construction?

• a) 1
• b) 2
• c) 3

Câu 91: Functions of the wing

• a) Create lift which keeps the aircraft in flight
• b) Store fuel for flight and support for the engines
• c) Create lift, store fuel for flight and support for the engines

Câu 92: Which AC power is generated by emergency generator

• a) One phase
• b) three phase
• c) two phase

Câu 93: Concerning electrical power, what is function of bus

• a) Transferring data
• b) A bus connects the power source to all the electrical consumers which use the same type of electrical power.
• c) Provides a connection between the two source

Câu 94: When is the reset of a circuit breaker possible

• a) The bimetal is bent
• b) Bimetal has returned to its normal shape
• c) About 1 minutes since circuit breaker is tripped

Câu 95: When does a power source switching always occurs

• a) An existing power source is lost or when a new power source becomes available.
• b) An existing power source is lost or when a new power source becomes available or a load is shedded.
• c) When a new power source becomes available or a load is shedded.

Câu 96: What type of loop used in wheel well fire detection systems?

• a) Pressure loop
• b) Dual loop
• c) Individual semiconductor loops

Câu 97: What happen when power source switching is performed from one power source to another one which is not allowed to work in parallel

• a) No loss of power occurs
• b) A loss of power for about a tenth of a second normally occurs
• c) A loss of power for about a tenth of a second normally occurs if switching is performed in flight

Câu 98: A stick shaker.

• a) Is a linear actuator attached to the base of the control column.
• b) Is an electric motor and mounted on the control column.
• c) Vibrates the elevators to cause buffeting of the airframe.

Câu 99: Which of the following trailing edge flaps give an increase in wing area?

• a) Split flap.
• b) Slotted flap.
• c) Fowler flap.

Câu 100: Concerning CSD (Constant Speed Drive), which mode is used during cruise

• a) Overdrive operation.
• b) Straight drive operation.
• c) Underdrive operation.

Câu 101: The forward pylon attach fittings transmit

• a) Weight and longitudinal loads
• b) Lateral loads and longitudinal loads
• c) Weight and lateral loads

Câu 102: For air conditioning equipment system, in flight the exhaust air goes

• a) Outboard to the atmosphere
• b) To the underfloor area or to the forward cargo compartment
• c) To the mixer to warm up pack air

Câu 103: When the cabin altitude increases, the volumetric flow

• a) Increases
• b) Decreases
• c) Keep constant

Câu 104: In a fully Fly By Wire Aircraft, ground spoilers are deployed automatically when the aircraft is on ground and

• a) Brakes are deployed.
• b) Thrust reversers are deployed.
• c) Weight on ground switch is activated.

Câu 105: If the aircraft is to be rolled to the right, where does the pilot feed in this command?

• a) Rudder Pedals.
• b) Control Wheel.
• c) Control Column.

Câu 106: In supersonic flight,

• a) Velocity decreases, temperature decreases
• b) Velocity increases, temperature increases
• c) Velocity decreases, temperature increases

Câu 107: An artificial feel system is necessary in a powered flying control system to

• a) Increasing the sensitivity of the control system.
• b) Provide the pilot with simulated stick forces.
• c) Prevent overloading of the power control units.

Câu 108: The type of flap which extends rearwards when lowered is called a

• a) Split flap.
• b) Plain flap.
• c) Fowler flap.

Câu 109: A/C in flight, both of the main AC busses are lost and batteries is only power source, what happen to essential busses

• a) Automatically shed.
• b) Automatically supplied
• c) Nothing happen

Câu 110: The function of the spoilers is to

• a) Increase the drag
• b) Reduce the lift
• c) Increase the drag and reduce the lift

Câu 111: Air exiting the compressor side of an ACM

• a) Will have decreased pressure and temperature.
• b) No change in temperature or pressure as it is a centrifugal compressor.
• c) Will have increased pressure and temperature.

Câu 112: Where is/are temperature sensitive detectors used in?

• a) The engine and APU area and in the wheel well and hot air duct
• b) The engine and APU area and in the wheel well
• c) The engine and in the wheel well and hot air duct

Câu 113: What is property of bus

• a) Low resistance
• b) High resistance
• c) High resistance at low temperature

Câu 114: On an aircraft fitted with elevons in normal flight, if a column is moved forward, the elevons will

• a) Remain stationary.
• b) Both move down.
• c) Both move up.

Câu 115: On an aircraft fitted with spoilers for lateral control, roll to the right is caused by.

• a) Left spoiler extending, right spoiler remaining retracted.
• b) Right spoiler extending, left spoiler remaining retracted.
• c) Both spoilers extending.

Câu 116: Which component is used as the measuring devices

• a) Transformers rectifier
• b) Contactor, breaker
• c) Current transformers

Câu 117: The inlet design must slow the air with the weakest possible series or combination of shock waves in order to minimize the energy losses caused by temperature

• a) Increases
• b) Decreases
• c) Increases or decreases depend on air speed

Câu 118: During the aircraft normal ground time of A/C, the outflow valves are

• a) Fully open
• b) Fully closed
• c) Partially open

Câu 119: When is engine driven generator switched automatically to the power distribution

• a) Voltage and frequency are OK, aircraft in flight and no failure is detected
• b) Voltage and frequency are OK and no failure is detected
• c) Voltage or frequency are OK and no failure is detected

Câu 120: For cargo ventilation, blower and extract fan operate when the isolations valve

• a) Fully closed
• b) Fully open
• c) Partially open

Câu 121: What type of sensor used in engine fire detection systems?

• a) Dual continuous loop
• b) Dual parallel loops
• c) Single continuous loop

Câu 122: What does the time that is needed to release a circuit breaker depend on

• a) Cross section of the wire
• b) The current that exceeds the nominal value.
• c) Maximum allowed current

Câu 123: What does the electrical power system mainly consists of

• a) Generation subsystem, consumers.
• b) Generation subsystem, distribution subsystem.
• c) Distribution subsystem, consumers.

Câu 124: The wing upper skin panel carries

• a) Mainly tension loads to the fuselage structure
• b) Mainly compression loads
• c) Mainly vertical loads to the fuselage structure

Câu 125: Surface flutter can be prevented by

• a) Balance weights.
• b) Trim tabs.
• c) Balance panels.

Câu 126: To check the reservoir pressure gage?

• a) Check permitted pressures on the pressure-temperature chart
• b) Check the yellow band on the reservoir pressure gage
• c) Check the green band on the reservoir pressure gage

Câu 127: How to ensures an external power source cannot be permanently switched on if the connection is not performed completely

• a) A cable holding strap which supports the cable weight is installed
• b) A small TR unit inside the GPCU, converts the three phase AC to 28 volts DC that is sent back to external power source to holds the power relay of energized.
• c) The three phase AC is sent back to external power source to holds the power relay of energized

Câu 128: 02 motors of outflow valve to be controlled by

• a) Digital signal
• b) Analog signal
• c) Both digital and analog signal

Câu 129: How is the power source switching controlled

• a) Manually
• b) Automatically
• c) Either automatically or manually

Câu 130: What is/are the risk when carry out the cabin pressure leakage test?

• a) Drop out of oxygen mask
• b) Overheating in electrical and electronic equipment
• c) Drop out of oxygen mask and overheating in electrical and electronic equipment

Câu 131: A differential aileron control is one which gives.

• a) A larger aileron up travel than down.
• b) The down-going aileron more travel than the up-going one.
• c) Equal aileron travel in each direction, but variable for stick movement.

Câu 132: How can voltage and frequency failures of a generator in parallel operation be detected

• a) By a load protection loop.
• b) By the voltage and frequency protection circuit.
• c) By a load division loop.

Câu 133: How does the battery provides 24 volts DC to the DC power distribution

• a) On the ground and during normal flight
• b) During flight in an emergency condition when A/C has total generator loss or on the ground in certain cases.
• c) During flight in an emergency condition when A/C has total generator loss only

Câu 134: In some locations on an aircraft where it is not possible to reach both sides of the structure, which type of fastener must be used?

• a) Bolt and nut
• b) Solid rivet
• c) Blind rivet

Câu 135: Which one is true about special coatings

• a) This is used to cover protected surfaces or to protect unprotected surfaces
• b) It helps the surface is roughened which provides a good contact for paint coatings
• c) The purpose is to remove all dirt, oil, fuel, fluid, dust deposits and accumulated dirt from landing gear and wheel for inspection and maintenance purposes

Câu 136: Which power distribution most important equipment is connected to

• a) The essential power distribution
• b) The emergency power distribution
• c) The main power distribution

Câu 137: What are advantages of 3−phase electrical power systems

• a) Easy and economic to use, neutral current which flows via the structure during normal operation is very big
• b) easy and economic to use, neutral current which flows via the structure during normal operation is always 0
• c) easy and economic to use, neutral current which flows via the structure during normal operation is very small.

Câu 138: The A/C equipped with elevons

• a) Does not have separated aileron
• b) Does not have separated rudder
• c) Use as a combination of elevator and flap

Câu 139: Rudder deflection is limited by

• a) Airspeed.
• b) Altitude.
• c) Flap position.

Câu 140: In a power assisted flight control system, the feel required is normally supplied by

• a) Q feel.
• b) Air loads on the control surfaces.
• c) Stretching springs.

Câu 141: If pressurization air supplies come from an engine compressor, an internal oil leak will.

• a) Not affect the issue as it is automatically detected and vented overboard.
• b) Contaminate the air.
• c) Not contaminate the air.

Câu 142: For air conditioning, a A320 has 3 zones. They are:

• a) Cockpit, fwd zone, aft zone
• b) Cockpit, cabin, cargo
• c) Cockpit, cabin, avionic compartment

Câu 143: If the side stick is moved forward and to the left.

• a) Left aileron moves down, right aileron up, elevator down.
• b) Left aileron moves up, right aileron down, elevator down.
• c) Left aileron moves up, right aileron moves down, elevator up.

Câu 144: If an aircraft is flying with a left wing low, to balance the A/C, you should move the left aileron trim tab?

• a) Moving the aileron trim tab will not correct the situation
• b) Down
• c) Up

Câu 145: What is the purpose of the differential protection circuit

• a) To detect voltage difference of two phases of 3-phase generator
• b) To detect frequency difference of two phases of 3-phase generator
• c) To detect short circuits in areas where circuit breakers are not usable

Câu 146: Type of smoke detector are in use in transport aircraft?

• a) The optical and the ionization
• b) The pressure and the ionization
• c) The optical and the pressure

Câu 147: Load alleviation function in turbulent weather conditions will result in

• a) Spoiler moving symmetrically upward.
• b) Ailerons moving symmetrically upward.
• c) Ailerons and spoiler moving symmetrically upward.

Câu 148: Main part of fire protection system?

• a) The fire detection system
• b) The fire detection system and the fire extinguishing system
• c) The fire extinguishing system

Câu 149: How does emergency generator supplies power to Essential and Emergency Busses

• a) Supplies AC power directly and DC power via essential transformer rectifier unit
• b) Supplies AC power directly only (battery supplies AC power)
• c) Supplies DC power directly and AC power via static inverter.

Câu 150: How is activation of the emergency generator performed manually

• a) On the ground only
• b) In flight only
• c) In flight or on ground

Câu 151: The aircraft is controlled about the lateral axis by the

• a) Ailerons.
• b) Rudder.
• c) Elevator.

Câu 152: How many types of fire extinguisher agents?

• a) 3
• b) 5
• c) 4

Câu 153: At very end of the pack system, it is

• a) The check valve
• b) The pack sensor
• c) The water separator

Câu 154: When working around or with the reservoir or any mechanism connected to it

• a) You must install the safety caps
• b) You must install the safety collars
• c) You must install the safety pins

Câu 155: For aircraft with multi external power sources, how ground power sources synchronized.

• a) By the generator control units.
• b) By logic circuit
• c) Ground power sources cannot be synchronized

Câu 156: The tail cone is

• a) A non-removable single unit
• b) A removable single unit
• c) A removable double unit

Câu 157: In a fly-by-wire aircraft, what controls the roll spoilers?

• a) Flight control computer.
• b) Flight augmentation computer.
• c) Flight management computer.

Câu 158: Which AC power is generated by static inverter

• a) One phase
• b) Three phase
• c) Two phase

Câu 159: For aircraft turn coordination

• a) Ailerons, rudder and THS will move.
• b) Ailerons, rudder and roll spoilers will move.
• c) Ailerons and rudder will move.

Câu 160: Pressurization control ensures that.

• a) At operational altitude the cabin altitude is below 8,000 ft.
• b) Pressurization does not start before aircraft is above 8,000 ft.
• c) The cabin is always maintained at sea level.

Câu 161: Which component is used as the switching devices

• a) Contactor, breaker and circuit breakers
• b) Contactor, breaker
• c) Contactor, breaker, fuses and circuit breakers

Câu 162: In normal flight, if the control wheel is moved to the left, then the aileron on the right wing will

• a) Deflected downward deflected upward
• b) Deflected upward
• c) Kept constant.

Câu 163: On the ground, the Ram air doors are

• a) Fully open
• b) Fully closed
• c) Open or close depends on temperature demand

Câu 164: A differential aileron control system results in.

• a) Aileron drag being reduced on the inner wing in a turn.
• b) Aileron drag being compensated by small rudder movements.
• c) Aileron drag being reduced on the outer wing in a turn.

Câu 165: In the event of a failure in the main power distribution or its power sources, how is the essential power supplied

• a) The remaining power source as long as any part of it is available, due to various switching functions.
• b) An emergency generator or the battery.
• c) The battery

Câu 166: How is the emergency power distribution supplied

• a) By the main power sources via the essential power distribution.
• b) An emergency generator or the battery.
• c) Normally by the main power sources via the essential power distribution and an emergency generator or the battery in case of total loss of the normal power sources.

Câu 167: The flaps are used in which flight phase?

• a) Landing
• b) Take-off
• c) Landing and Take-off

Câu 168: Which consumers are of DC power consumers

• a) Battery, static inverter, DC motor, solenoid
• b) Static inverter, DC motor, solenoid, transformer
• c) Battery, static inverter, DC motor, solenoid, rectifier

Câu 169: What happen if a manual trip is performed by releasing the corresponding generator pushbutton switch

• a) Generator control relay open, exciter current is cut off, generator power relay open
• b) Generator control relay open, generator power relay open
• c) Generator power relay open,

Câu 170: The cabin windows have

• a) 1 panes
• b) 2 panes
• c) 3 panes

Câu 171: Which layer is directly applied before applying top coat layer

• a) Wash primer
• b) Primer
• c) Pre-treatment

Câu 172: The vent door (of cargo door) provides pressure relief by

• a) Opening outward when the differential pressure between inside and outside of the fuselage is greater than 1 psi
• b) Opening inward when the differential pressure between inside and outside of the fuselage is greater than 5 psi
• c) Opening inward when the differential pressure between inside and outside of the fuselage is greater than 1 psi

Câu 173: Which consumers use three phase AC power source

• a) Only consumers which need all three phases at the same time to operate such as 3 phase motors and TR units.
• b) Consumers which need all three phases at the same time to operate and single phase consumers.
• c) Only large loads

Câu 174: An artificial feel system is required

• a) For power assisted control systems.
• b) For proportional control systems.
• c) For power operated control systems.

Câu 175: In electrical emergency configuration while emergency generator is not ready, how is emergency power distribution normally supplied

• a) From aircraft battery via a static inverter
• b) From aircraft battery via a transformer rectifier (TR)
• c) From aircraft battery directly and via a static inverter

Câu 176: How is the phase angle difference of two power source reduced to zero

• a) No way
• b) Voltage differences of two power source is used as correction signal to produces a small frequency difference
• c) Two power source is reset at the same time.

Câu 177: During the time the aircraft is parked, what must do to prevents a discharge of the battery by the emergency equipment.

• a) All batteries must be switched off
• b) All batteries must be switched on
• c) All batteries must be switched on and charged daily

Câu 178: Which is used as circuit breaker markings

• a) Safety collar, safety clip and safety tags
• b) Safety clip and safety tags
• c) Colored collar, safety clip and safety tags

Câu 179: If a stall is approaching, what indication does the pilot get?

• a) Stick Shaker.
• b) EICAS warning.
• c) Stick Nudger.

Câu 180: Excessive wear on both sides of the control cable pulley groove is evidence of

• a) Excessive cable tension.
• b) Pulley misalignment.
• c) Cable misalignment.

Câu 181: On aircraft fitted with spoilers for lateral control, roll to the right is caused by.

• a) Left and right spoilers extending
• b) Right spoilers extending, left spoiler remain retracted
• c) Left spoilers extending, right spoiler remain retracted

Câu 182: Which component is used as the safety devices

• a) fuses and circuit breakers
• b) Contactor, breaker and circuit breakers
• c) Contactor, breaker, fuses and circuit breakers

Câu 183: Which type of operation does aircraft electrical system operate in when multi external power sources are supply to aircraft and other power sources is not available

• a) Isolated operation
• b) Parallel operation
• c) Isolated or parallel operation

Câu 184: How far are frames normally spaced used in constructing the fuselage?

• a) 20 inches
• b) 22 inches
• c) 24 inches

Câu 185: On modern A/C, which source is normally used as input of transformer rectifier (TR)

• a) One phase AC
• b) three phase AC
• c) DC

Câu 186: How is the power source switching performed

• a) By power relays that are controlled either by a generator control/ ground power unit
• b) By bus tie relays that are controlled either by a generator control/ ground power unit
• c) By remote controlled circuit breaker that are controlled either by a generator control/ ground power unit

Câu 187: What is the purpose of a differential aileron?

• a) To decrease the drag and decrease the rate of yaw and turn.
• b) Has no effect on rate of yaw and turn.
• c) To increase the drag to increase the rate of yaw and turn.

Câu 188: Way to reduce the wave drag

• a) Use vortex generators
• b) Apply the "Area rule"
• c) Use vortex generators and apply the "Area rule"

Câu 189: Which load is shedded to prevent an overload

• a) Lighting load
• b) Antice load
• c) Large load such as oven, coffee maker, ect

Câu 190: All speeds around the aircraft are below the speed of sound is called

• a) The subsonic region
• b) The transonic region
• c) The supersonic region

Câu 191: What type of the lavatory smoke detection sensors?

• a) Single sensor in the lavatory ceiling area
• b) Single sensor in the lavatory sidewall area
• c) Dual sensor in the lavatory ceiling area

Câu 192: What are main advantages of parallel operation over isolated operation

• a) All generators share the same part of the total load and there is no power interruption when one or several generators are switched off
• b) Reduce complication of generator control units operation
• c) High redundant for avionic equipment

Câu 193: In case of cargo fire, the cargo isolation valve are

• a) Open to stop the air flow
• b) Close to stop the air flow
• c) Open to add more air to cargo compartment

Câu 194: Pushing the left rudder pedal

• a) Yaws the aircraft left and possibly the right wing will rise.
• b) Yaws the aircraft right
• c) No effect on the aircraft.

Câu 195: Elevons combine the functions of both

• a) Elevator and aileron.
• b) Rudder and aileron.
• c) Rudder and elevator.

Câu 196: To prevent loop failures and false fire warnings, we must?

• a) Obey a maximum bending not more than 3.2 mm and a minimum radius not less than 25.4 mm
• b) Obey a maximum bending not more than 3.2 mm and a minimum radius not less than 2.54 mm
• c) Obey a maximum bending not more than 4.2 mm and a minimum radius not less than 25.4 mm

Câu 197: What does a three phase AC power relay consist of

• a) A high power main contacts which are operated by three electro magnetic device.
• b) Three high power main contacts and each contact is operated by an electromagnetic device individually.
• c) Three high power main contacts which are operated by an electro magnetic device.

Câu 198: When does transformer rectifier (TR) have low current

• a) An internal failure occur
• b) An overload occur
• c) Short circuit occur

Câu 199: Spoiler panels are controlled by

• a) The aileron control wheel and speed brake lever.
• b) A speed brake lever only.
• c) The aileron control wheel only.

Câu 200: What is isolated operation

• a) One power source work at a time
• b) The power sources work in isolation from each other
• c) The power sources share the same
• amount of load

Câu 201: In isolated operation, how is bus tie controlled

• a) By the generator control units.
• b) By logic circuit
• c) By the generator control units and by logic circuit

Câu 202: Mass balance weights are used to

• a) Balance the trailing edge of flying control surfaces.
• b) Prevent flutter on control surfaces.
• c) Balance the tabs.

Câu 203: How are generation and distribution split into

• a) One phase and three phase
• b) AC subsystem and a DC subsystem
• c) One phase and multi-phase

Câu 204: In some modern aircraft types, what happen when circuit breakers with green control knobs is tripped

• a) Caution message, name and location of the open circuit breaker is presented on display to allows an easy identification of the circuit breaker
• b) Name and location of the open circuit breaker is presented on display to allows an easy identification of the circuit breaker
• c) Nothing happen

Câu 205: An air-to-air heat exchanger is provided to.

• a) Reduce the air supply temperature.
• b) Increase the air supply temperature.
• c) Provide an emergency ram air supply.

Câu 206: Active load alleviation control uses

• a) Ailerons and spoilers.
• b) Elevator and ailerons.
• c) Elevator and stab.

Câu 207: Moving the elevator control columns fully aft, then the

• a) Aircraft tends to go nose down.
• b) Aircraft tends to go nose up.
• c) Aircraft tends to roll to the right.

Câu 208: What is advantages of breaker over the contactor

• a) The coil can be smaller because no heat is produced in the coil during the closed state
• b) The coil can be bigger because no heat is produced in the coil during the closed state and stays closed even when no electrical power is available.
• c) The coil can be smaller because no heat is produced in the coil during the closed state and stays closed even when no electrical power is available.

Câu 209: The movable rudders are attached to

• a) the trailing edge of the fixed vertical stabilizer
• b) the leading edge of the fixed vertical stabilizer
• c) the center hinge of the fixed vertical stabilizer

Câu 210: Ground spoilers are used to

• a) Increase wing loading on take-off.
• b) Prevent FOD ingestion into the engines on landing and taxiing.
• c) Dump the lift and increase the drag

Câu 211: On the ground, the maximum deflection of spoilers/speedbrakes is

• a) 15°.
• b) 30°.
• c) 45°.

Câu 212: Cabin pressure controller maintains a pre-set cabin altitude by.

• a) Regulating the mass flow into the cabin.
• b) Regulating the position of the inward relief valve.
• c) Regulating the position of the outflow valve.

Câu 213: For maintenance purposes, what is advantages of circuit breakers over fuses

• a) They can be reset quickly and can also be used as manual on − off switches to allow deactivation of circuits.
• b) They can be replaced quickly and can also be used as manual on − off switches to allow deactivation of circuits.
• c) They is the easiest method of overcurrent protection

Câu 214: A four engines aircraft is operating with all generators in parallel operation, what happen when bus tie 1 push button on the electrical control panel is released

• a) Remaining generators supplies all AC load
• b) Generator 1 supplies all AC load
• c) All busses are still powered, but generator 1 supplies AC bus 1, isolated from the remaining distribution, like in an aircraft with an isolated power distribution

Câu 215: How to prevent over-limit current

• a) A circuit breaker or fuse is installed
• b) A breaker or fuse is installed
• c) A circuit breaker or breaker is installed

Câu 216: Where is landing gear support arm located?

• a) Wing rear spar
• b) Wing front spar
• c) Wing front spar and wing rear spar

Câu 217: How to hold the contacts of breaker in the closed state

• a) A DC current flow the coil continuously
• b) Only a short current pulse
• c) A latching device, normally a permanent magnet, is used

Câu 218: In fully Fly By Wire aircraft, wing root bending moments are reduced by

• a) Transfer of fuel from one wing tank to another.
• b) Operation of the elevator.
• c) Symmetrical application of ailerons.

Câu 219: During electrical emergency configuration (both of the main AC busses are lost), when the emergency generator is not available, which power source supply electrical power for aircraft

• a) Batteries take over automatically, it can only supply the most important equipment.
• b) Batteries take over automatically, it can supply all the essential equipment for flying the aircraft
• c) Batteries take over manually, it can only supply the most important equipment.

Câu 220: Cockpit air supply uses

• a) Fresh air only
• b) Recirculation air only
• c) Mixed air

Câu 221: Which one is not purpose of primer layer:

• a) The primer increases the corrosion resistance 1properties because it contains corrosion inhibitors
• b) The primer also protects the surface against corrosive agents and gives a good surface for the adhesion of the subsequent paint coatings.
• c) The primer has the function to protect the layers of the bare material and gives the aircraft the necessary appearance.

Câu 222: For roll control the aircraft is controlled by

• a) Ailerons.
• b) Elevator.
• c) Rudder.

Câu 223: What is main function of rotating rectifier in modern brushless generator

• a) Rectify alternating current from PMG (Permanent Magnets Generator) to generate exciter current of main generator.
• b) Rectify alternating current from main generator to generate exciter current of PMG (Permanent Magnets Generator).
• c) Rectify alternating current from exciter generator to generate exciter current of main generator.

Câu 224: What is purpose of the essential power distribution

• a) Supplies all the systems that are necessary to operate the aircraft safely in electrical emergency configuration.
• b) Supplies all the systems that are necessary to operate the aircraft safely during automatic landing
• c) Supplies all the systems that are necessary to operate the aircraft safely.

Câu 225: What is trip free type circuit breaker

• a) Circuit breaker is able to open an overloaded circuit even if the control knob mechanism is blocked.
• b) Circuit breaker is not able to open an overloaded circuit if the control knob mechanism is blocked.
• c) Circuit breaker is able to be closed remotely.

Câu 226: The vent hole makes sure that during normal operation, the pressure between the panes is the same as the cabin pressure, it located at?

• a) In the center near the bottom of the inner pane
• b) In the center near the top of the inner pane
• c) In the center near the bottom of the outer pane

Câu 227: The equipment cooling system is

• a) A sub system of Air conditioning system
• b) Independent of Air conditioning system
• c) Semi-dependent of Air conditioning system

Câu 228: Cabin differential pressure is the difference between.

• a) 8,000 ft and sea level.
• b) Cabin pressure and ambient pressure.
• c) I.S.A. conditions and aircraft altitude.

Câu 229: The basic construction of the doors comprises

• a) The door structure and the different mechanisms
• b) The door structure and the linings
• c) The door structure, the linings and the different mechanisms

Câu 230: How is the main AC bus normally shown on electrical schematics

• a) As a single bus
• b) As a single bus with a '3p' label
• c) As 3 single bus

Câu 231: The wing lower skin panel carries

• a) Mainly tension loads to the fuselage structure
• b) Mainly compression loads to the fuselage structure
• c) Mainly vertical loads to the fuselage structure

Câu 232: How can each part of the distribution system be supplied with electrical power

• a) Main power and essential power are supplied with electrical power from a normal source and, in case of loss of this source, from an alternate source, emergency power are supplied with electrical power from only source.
• b) Essential power are supplied with electrical power from a normal source and, in case of loss of this source, by an alternate source, main power and emergency power are supplied with electrical power from only source.
• c) Each part of the distribution system can be supplied with electrical power from a normal source and, in case of loss of this source, from an alternate source

Câu 233: What is purpose of fuse of electronic circuit breaker

• a) To protect electronic circuit breaker
• b) Fuse works as a safety backup in case of a short circuit, if the electronic circuit does not work properly.
• c) To protect shunt of electronic circuit breaker

Câu 234: Which action must be done when a fuse is blown

• a) Fuse must be reset after repairing the affected circuit
• b) Fuse must be replaced without any action is taken place
• c) Fuse must be replaced after repairing the affected circuit

Câu 235: What is purpose of switch of static inverter

• a) Induces an sinusoidal current into the primary winding of the transformer of static inverter
• b) Change direction of current in the primary winding of the transformer of static inverter
• c) Protect primary winding of the transformer of static inverter

Câu 236: Which of the following is not a primary flying control?

• a) Tailplane.
• b) Elevator.
• c) Rudder.

Câu 237: Conditioned air is.

• a) Temperature and pressure adjusted.
• b) Moisture removed.
• c) Oxygen added.

Câu 238: What is advantage of electronic circuit breaker

• a) Save weight and space in the cockpit and that it is possible to change the trip values via rheostat
• b) Save weight and space in the cockpit and that it is possible to change the trip values of the virtual circuit breaker by loading of a new software.
• c) Save weight and space in the cockpit and that it is possible to change the trip values via variable capacitor

Câu 239: What does breaker need to close the contacts

• a) A DC current flow the coil continuously
• b) A AC current flow the coil continuously
• c) Only a short current pulse

Câu 240: A differential aileron system is designed to

• a) Minimize flutter.
• b) Compensate for aileron reversal.
• c) Avoid the problem of the negative turning movement

Câu 241: Which method of cabin pressure leakage test requires people in cockpit for monitor the system

• a) Use APU and switch on packs
• b) Use special external equipment via the low pressure ground connector
• c) When use APU or external power

Câu 242: A red warning light on the door flashing indicates

• a) Door is locked and armed
• b) Door is locked and dis-armed
• c) The cabin is pressurized

Câu 243: The anti−balance tab deflects

• a) In the same direction as the control surface
• b) In the opposite direction as the control surface
• c) Depend on demand of pilot

Câu 244: What is /are main components of the gas pressure loop?

• a) Stainless steel tube
• b) Stainless steel tube and responder
• c) Responder

Câu 245: What happens when a control stick is pulled back and to the left?

• a) Elevator up, left aileron down.
• b) Elevator down, right aileron down.
• c) Elevator up, right aileron down.

Câu 246: Which type of battery is used in modern aircraft

• a) Lead acid battery
• b) Nickel cadmium battery
• c) Lead acid battery or nickel cadmium

Câu 247: Which area Fire detection systems must always be operative?

• a) The engines and the APU
• b) The APU
• c) The engines

Câu 248: Which lift device increase lift 70%?

• a) Plain flap
• b) Slotted flap
• c) Fowler flap

Câu 249: What is/are types of continuous loops?

• a) Single loop and the pneumatic pressure loop
• b) Semiconductor loop and the electrical loop
• c) Semiconductor loop and the pneumatic pressure loop

Câu 250: The mixing unit lets

• a) The hot air from the packs mix with discharged cabin air
• b) The cold air from the packs mix with discharged cabin air
• c) The cold air from the packs mix with discharged cargo air