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Worksheetsa320 el
Total questions: 121
Worksheet time: 61hrs 30mins
A fuel cross-feed valve is usually in
Closed Position.
Both Position
Left Position.
Right Position.
The primary purpose of an aircraft's fuel jettison system is to quickly achieve a
Reduce Weight
Weight Balance
reduced fire hazard.
To Landing
Integral tanks are
cavities within the aircraft's airframe itself.
external tanks needs to be fabricated.
external tanks required to put in the airframe.
there is no such type of fuel tank.
When refueling
the fuel nozzle will automatically cut off the supply when the tank is full.
the fuel nozzle will manually cut off by pilot.
it is important to fill the expansion space in the tank.
it is important not to fill the expansion space in the tank.
Microbial growth is
red dots
brown black slime
green sludge
yellow dots
A zero fuel test on a fuel quantity indicating system is carried out with
tanks completely full.
tanks with unusable fuel.
tanks empty apart from unusable fuel.
tanks completely empty.
On large transport aircraft fuel is delivered to each engine using
a parallel system.
a series system.
a separate system for each engine.
the same system for each engine.
In biologically contaminated fuel, corrosion takes place
below the fungal colonies.
the top of the tank.
the bottom 2 inches of the tank.
the side of the tank.
Cross feed valves permit fuel transfer from
tank to tank.
left tank to right tank.
any tank to any engine.
none all above.
The purpose of a scavenge system within a fuel system is
to ensure that all unused fuel is returned to the tanks efficiently.
To prevent water flows to fuel tank
to ensure that any water in the fuel is constantly dispersed thus reducing microbiological contamination.
to ensure that all available fuel can be used.
To shut-off the LP fuel supply to the engine for the purpose of engine removal you would
close the cross-bleed valve.
close the HP fuel lock.
Emergency shut off
pull the fire handle.
The advantages of integral fuel tanks are that they
are safer on fire hazard compare to others
use the maximum volume for fuel and have the minimum amount of weight.
are easier to design and construct and use the maximum volume of fuel.
are cheaper to manufacture, more durable and easier to maintain.
In a light fixed wing aircraft, the fuel warning light indicates
pump failure.
the tank does not pressurized.
Fuel is lower than normal level.
ice blockage, filter popped or pump fail.
A fuel cross-feed valve is lubricated
by internal cooling.
by air.
by the fuel.
by lubricant.
A fuel tank suction valve will open when
the booster pump fails.
either the engine driven pump fails or booster pump fails.
the engine driven pump fails.
both the engine driven and booster pump fails.
A shroud vent and overload drain would normally be found on
engine cross feed system
fuel jettison system.
fuel tank vent pipes.
the APU fuel feed.
A check valve is fitted to a fuel jettison system to
prevent the center from being defueled.
prevent the dumping of the outer tanks.
automatically stop the fuel jettison operation after a period of time.
prevent fuel back pressure
The purpose of control cable regulators is to
maintain flight level.
maintain preset cable tensions during flight.
compensate for low temperature only.
compensate for high temperature only.
A yaw damper gain could be fitted with
decreases sensitivity for decreased speed.
increased sensitivity for increased speed.
decreases sensitivity for increased speed.
increased sensitivity for decreased speed.
With respect to flight spoilers, they
can operate both on the ground and in flight.
only emergency situation
only operated on the ground
only operated in flight
In a fly-by-wire aircraft, what controls the roll spoilers?
Flight control computer.
Flight augmentation computer.
Air data computer.
Flight management computer.
What is an aileron balance cable for?
To allow the cable to be tensioned.
To correct for wing heaviness.
To allow aircraft to fly hands off.
To correct for balancing aircraft.
A horn balance on a control will
increase degree of movement at high speed.
decrease degree of movement at low speed.
decrease degree of movement at high speed.
increase degree of movement at low speed.
Active load control uses
elevator and aileron.
slat and aileron.
aileron and spoiler.
elevator and stab.
Differential aileron control will
cause difficult to control
cause a nose up moment.
prevent yawing in conjunction with rudder input.
cause a nose down moment.
On a fly-by-wire aircraft, what controls stabilizer trim?
SEC.
ELAC and SEC.
ELAC.
LEC.
How is the stabiliser automatically controlled in normal manual operation?
Mach/Speed Trim.
Pitch Trim.
Electric Trim.
Hydraulic Trim.
In an aircraft system employing balance tabs, the installation of external ground locks between control surface and balance tabs
would prevent the movement of the control column.
is unnecessary since the system is irreversible.
would not prevent the movement of the control column.
none all above.
What is used to correct any tendency of the aircraft to move towards an undesirable flight attitude?
Trim tabs.
Spring tabs.
Balance tabs.
Trim tabs and Spring tabs.
In a fly-by-wire control system, the follow-up transducer is fitted to
the pilots input.
the hydraulic actuator.
the electric system.
the control system computer.
A stick shaker is a device which
gives a short period of landing.
helps extricate an aircraft from soft ground.
gives a short period of extra lift to assist take off.
vibrates the control column near stalling speed.
The purpose of the servo valve in a power operated control is
to provide pressure to operate the control.
to direct hydraulic fluid to the jack in response to the pilot’s control in cockpit.
to revert the system to manual operation.
A and C is correct
Differential aileron control will
cause difficult to control
cause a nose up moment.
prevent yawing in conjunction with rudder input.
cause a nose down moment.
A servo tab is operated
indirectly by the pilot to produce forces which in turn move the main control surfaces.
by a trim wheel and moves in the opposite direction to the main control surfaces when moved.
automatically, and moves in the same direction as the main control surfaces.
directly by the pilot to produce forces which in turn move the main control surfaces.
What type of packing’s should be used in hydraulic components to be installed in a system containing Skydrol?
AN packing’s made of natural rubber.
Packing materials made for ester base fluids.
AN packing’s made of neoprene.
O-ring paking
If a hydraulic brake system uses neoprene rubber packing materials, the correct hydraulic fluid to service the system is
mineral base oil.
synthetic base oil.
phosphate ester base oil.
water base
The internal resistance of a fluid which tends to prevent it from flowing is called
Velocity
viscosity.
acidity.
Vlotage
What is the viscosity of hydraulic fluid?
The increase in volume of a fluid due to temperature change.
The fluid’s ability to resist oxidation and deterioration for long periods.
The internal resistance of a fluid which tends to prevent it from flowing.
The fluid ability to make pressure
Which is a characteristic of petroleum base hydraulic fluid?
Flammable under normal conditions.
Compatible to natural rubber seals and packings.
Nonflammable under all conditions.
Fire resistance
What is the main purpose of a pressurized reservoir in a hydraulic system?
Prevent hydraulic pump cavitation.
Prevent hydraulic fluid from foaming.
Prevent tank collapse at altitude.
Make up pressure
Which is a characteristic of phosphate ester base hydraulic fluid?
Low flash point.
Low moisture retention.
High flash point.
High viscoscity
Two types of hydraulic fluids currently being used in civil aircraft are
Mineral base, and phosphate ester base.
Mixed mineral base and phosphate ester base.
Petroleum base and mixed mineral base.
Plant base, and phosphate ester base.
Which of the following lists only desirable properties of a good hydraulic fluid that has chemical stability?
High viscosity, low flash point, high fire point.
High flash point, low viscosity, low fire point.
Low viscosity, high flash point, high fire point.
High flash point, high viscosity, high fire point
Characteristics of MIL-H-8446 (Skydrol 500 A & B) hydraulic fluid are
blue color, phosphate ester base, fire resistant, butyl rubber seals.
light purple color, phosphate ester base, fire resistant, butyl rubber seals.
light green color, phosphate ester base, fire resistant, butyl rubber seals.
black pink color, phosphate ester base, fire resistant, butyl rubber seals.
Phosphate ester base hydraulic fluid is very susceptible to contamination from
ethylene propylene elastomers.
Teflon seal material.
water in the atmosphere.
rubber
Petroleum base hydraulic fluid is which color?
Purple.
Red.
Blue.
yellow
In brake service work, the term “bleeding brake” is the process of
replacing small amounts of fluid in reservoir.
withdrawing air only from the system.
withdrawing fluid from the system for the purpose of removing air that has entered the system.
replacing all fluid system
When bleeding aircraft brakes, one of the indications that the air has been purged from the system is
full brake pedal travel.
partial brake pedal travel.
firm brake pedals.
shiny brake pad
Pressure source for power brake
the main hydraulic system.
a master cylinder.
the power brake reservoir.
oil pressure
What should be check when a shock strut bottoms during a landing?
Fluid level.
Air pressure.
Packing seals for correct installation.
oil pressure
Excluding line, which components are required to make up a simple hydraulic system?
Pump, reservoir, relief valve, and shuttle valve.
Actuator, pressure reservoir, accumulator, and selector valve.
Pump, reservoir, selector valve, and actuator.
Gen,Pump,FCU,PG
The primary purpose for balancing aircraft wheel assemblies is to
prevent heavy spots and reduce vibration.
reduce excessive wear and turbulence.
distribute the aircraft weight properly.
Airplane can take off faster
What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?
Limit compression stroke.
Maintain correct wheel alignment.
Hold the strut in place.
Smoother landing
The purpose of sequence valve in a hydraulic retractable landing gear system is to
prevent heavy landing gear from falling too rapidly upon extension.
provide a means of disconnecting the normal source of hydraulic power and connecting the emergency source of power.
ensure operation of the landing gear and gear doors in the proper order.
Faster retrack gear
What type of valve use brake actuating line to isolate emergency brake system
A shuttle valve.
A bypass valve.
An orifice check valve.
check valve
Many hydraulic reservoirs contain a small quantity of fluid which is not available to the main system pump. This fluid is retained to
supply fluid to the auxiliary pump.
prime the main system.
supply fluid to the pressure accumulator.
reservoir
A strip or mark applied to a wheel rim and extending on to sidewall of tube type tire is
wheel weight reference mark.
wheel-to-tire balance mark.
slippage mark.
red dot
A hydraulic accumulator is charged of 1,000 psi. When a hydraulic system pressure of 2,800 psi is developed, the pressure on the air side of the accumulator will be
4,000 PSI.
3,000 PSI.
2,800 PSI.
1,000 PSI.
Which seal/material is used with phosphate ester base hydraulic fluid?
Silicone rubber.
Neoprene rubber.
Butyl rubber.
Plastic ribber
A common cause of slow actuation of hydraulic components is
restricted orifices.
internal leakage in the actuating unit.
cold fluid.
high viscosity.
The purpose of a relief valve in a brake system is to
prevent the tire from skidding.
reduce pressure for brake application.
compensated for thermal expansion.
to prevent excess pressure
Excessive wear in the shoulder area of an aircraft tire is an indication of
excessive toe in.
underinflation.
overinflation.
Hard landing
What is the function of a cam incorporated in a nose gear shock strut?
Provides steering of aircraft during ground operation.
Straightens the nosewheel.
Provides an internal shimmy damper.
all correct
Internal leakage in a brake master cylinder unit can cause
the pedal to slowly creep down while pedal pressure is applied.
fading brakes.
slow release of brakes.
brake lock
How can it be determined that all air has been purged from a master cylinder brake system?
By noting whether the brake is firm or spongy.
By noting the amount of fluid return to the master cylinder upon brake release.
By operating a hydraulic unit and watching the system pressure gauge for smooth, full-scale deflection.
All correct
A landing gear position and warning system will provide a warning in the cockpit when the throttle is
advanced and gear is down and locked.
advanced and gear is down and unlocked.
retarded and gear is down and locked.
retarded and gear is not down and locked.
Select the three pressurization terms used in aircraft pressurization systems.
Cabin altitude
Cabin differential pressure
Cabin rate of climb
Outside air temperature
Bleed air temperature
Usually there are three cockpit indications for pressurization systems. Which instruments provide these indications? Select all that apply.
The cabin altimeter
Cabin rate of climb or vertical speed indicator
Cabin differential pressure indicator
Outside air temperature gauge
Fuel flow indicator
Which of these is not a consequence of cross-contamination of vapor cycle refrigerants?
Reduced performance
Increased operating costs due to separation and purification
Fines from the EPA
Lubrication problems
A system incorporating a compressor/expansion turbine unit is called a/an
Bootstrap system
Closed air-cycle system
Heat exchanger system
Open air-cycle system
Which of these cabin pressurization system checks tests the structural integrity of the fuselage?
Cabin static pressure test
Cabin pressure dynamic pressure test
Low-stage bleed port test
Pressure regulator operation test
Preventing over-pressurization and subsequent damage to the aircraft structure is the job of the
Pressurization safety valve
Cabin pressure dump valve
Air exchanger
Outflow valve
A negative pressure relief valve is included on pressurized aircraft to ensure
that air pressure outside the aircraft does not exceed cabin air pressure.
that cabin differential pressure is maintained at all times.
that cabin rate of climb is limited during descent.
that outflow valves remain closed during rapid descents.
A cold air unit produces a drop in temperature by
expanding hot air across a turbine which is driving a compressor.
directing compressed air into a heat exchanger.
air supply to the cabin.
using cold coil
The purpose of mixing bleed air is to provide
humidity control for the cabin.
increased manifold pressure for the engine.
regulated temperature.
improved fuel economy.
In a Freon system, the component where refrigerant gives up heat and changes from vapor to liquid is the
Evaporator
Condenser
Receiver
Compressor
A malfunction in a Freon system called slugging occurs when
The thermostatic expansion valve does not have enough refrigerant
The thermostatic expansion valve has too much refrigerant
Liquid refrigerant enters the compressor
Heat is removed from the Freon in the condenser, condensing it to a liquid
Combustion heater control by thermostat circuit is accomplished with a
Thermostat cycling switch
Thermal fuse
Pressure regulator
Outflow valve
Ventilating air for a combustion heater is supplied on the ground by
a ram-air scoop only.
an electrically driven blower.
the fuel pump.
an exhaust ejector.
Negative relief valves
open to prevent negative differential pressure when outside pressure exceeds that inside the aircraft by a predetermined amount.
close to maintain maximum cabin pressure during climb.
vent fuel vapors from the combustion heater.
are used only on unpressurized aircraft.
A squib, as used in a fire-protection system, is a
device for causing the fire-extinguishing agent to be released.
pressure relief valve for fire bottles.
manual discharge handle.
temperature-sensing element.
On a periodic check of fire-extinguisher containers, the pressure was not between minimum and maximum limits. What procedure should be followed?
Replace the extinguisher container.
Recharge it to the nominal pressure regardless of limits.
Leave it in service if temperature is normal.
Purge the system and reinstall the same container.
What method is used to detect the thermal discharge of a built-in fire-extinguisher system?
A rupture of the red plastic disk in the thermal discharge line
A pressure switch in the cockpit
A change in cabin differential pressure
A signal from the thermostat cycling switch
A thermal switch fire-detection system uses
a bimetallic thermostat switch.
a thermocouple loop.
a pressure sensor.
an optical detector.
A fire-extinguisher container can be checked to determine its charge by
weighing the container and its contents.
inspecting the red plastic disk.
reading the cockpit pressure gauge.
listening for gas flow when actuated.
Which fire extinguisher is best for use in occupied personnel areas?
CO2
Halon 1301
Halon 1011
Dry powder
Built-in aircraft fire-extinguishing systems are ordinarily charged with
halogenated hydrocarbons and nitrogen.
compressed air only.
CO2 and oxygen.
argon and helium.
A thermocouple in a fire-detection system causes the warning system to operate because
it generates a small current when heated.
it closes a mechanical switch when cooled.
it senses differential pressure in the loop.
it emits light when energized.
The most common cause of false fire warnings in continuous-loop fire-detection systems is
dents, kinks, or crushed sensor sections.
electrical shorts in cockpit wiring.
empty fire-extinguisher bottles.
blocked outflow valves.
Which of these can happen if an oxygen cylinder valve is opened too quickly?
The oxygen cylinder can become a projectile
The regulator diaphragm can rupture allowing high pressure gas to escape
The cylinder is rendered useless
The valve is destroyed and must be replaced before using the cylinder
Which of these components of a Freon system is supported by all of the other components in the system, and is where the actual cooling is done?
Evaporator
Condenser
Receiver
Compressor
Which of these components of a Freon system senses evaporator conditions and meters refrigerant to satisfy them?
Receiver
Evaporator
Expansion valve
Surge valve and temperature controls
Which of these maintains the cabin pressure in a pressurized fuselage?
Cabin pressure dump valve
Pressurization safety valve
Outflow valve
Air exchanger
Oxygen content and atmospheric pressure remain high enough to maintain almost full saturation of the blood with oxygen, ensuring normal body and mental functions, up to what altitude?
10,000 feet above sea level
7,000 feet above sea level
15,000 feet above sea level
One mile above sea level
In the event of failure of the fixed oxygen systems, portable oxygen systems are used primarily to maintain:
Cabin pressure
Passenger comfort and safety
Crew functions
Cabin oxygen levels
At what altitude will unconsciousness likely occur without an oxygen supply and where blood oxygen saturation is down to 50–55 percent?
25,000 feet above sea level
15,000 feet above sea level
Two miles above sea level
10,000 feet above sea level
Regarding the marking on an oxygen cylinder after manufacture, the plus-rating indicates that the cylinder
Meets the requirements for a 10-year retest
Has been hydrostatically tested
Must be retired after 4,380 fillings
Qualifies for a 10% overfill rating
Regarding oxygen breathing regulators, A&P technicians are responsible for
Remove and installation
Component maintenance
Training on pressure-demand regulators
Adjusting the pressure as the altitude changes
The success or failure of high-altitude flight depends primarily on the proper functioning of which component, referred to as the heart of the oxygen system?
Oxygen mask
Distribution line
Oxygen system check valve
Oxygen breathing regulator
The pneumatic system pump is a
Centrifugal type
Rotor valve type
Piston type
Gear pump
Two compressors driven by separate engines use
Interconnected to share loads
NRVs to prevent compressors driving each other
PRVs
LPG and NGV
Not interface of pneumatic system?
APU
Wing, tail, anti-icing
Engine, APU extinguisher
Brake
Type detector, fixable metallic use?
Leak by thermal switch
Leak by failure loop
Leak by pressure switch
Leak by bimetallic switch
Low stage pressure 36 psi, what component actuate?
PRV
OPV
HPV
TLT
Drinking water pipes are prevented from freezing by
Installation of neoprene foam insulation
Wrapping the pipes with heated tapes or ribbons
Placing the pipes adjacent to hot water piping
placing pipe in side bleed air
A toilet recirculation fan is unserviceable in flight.
Close toilet until landing
You can use the toilet as the toxic chemical toilet
It can be overcome by thermal compensating device
All correct
Toilet flush motor is protected from overheat by
Thermal protection
Water cooling
Cooling fan on timer switch
Ram air
How is the cabin pressure of a pressurized aircraft usually controlled?
By a pressure sensitive switch that causes the pressurization pump to turn on or off as required
By an automatic outflow valve that dumps all the pressure in excess of the amount for which it is set
By a pressure sensitive valve that controls the output pressure of the pressurization pump
The purpose of the dump valve in a pressurized aircraft is to relieve
All positive pressure from the cabin
A negative pressure differential
Pressure in excess of the maximum differential
Decrease pressure from cabin
Which of these types of damage to a combustion heater can be repaired?
Deformation due to overheating
Small fatigue cracks
Soft and spongy metal due to overheating
Deformation due to backfiring, but causing less than a 10 percent drop in ventilating air pressure
When used in fire-detection systems having a single indicator light, thermal switches are wired in
Parallel with each other and in series with the light
Series with each other and in parallel with the light
Parallel with each other and in parallel with the light
Series with each other and in series with the light
A thermocouple in a fire-detection system causes the warning system to operate because
It generates a small current when heated
It changes resistance sharply when heated
It opens the circuit when heated
It closes the circuit mechanically when heated
According to the module overview on ice and rain protection, which media are used for de-icing systems in aircraft?
Electrical
Hot air
Pneumatic
Chemical
The cabin air pressure regulator maintains cabin altitude at a selected level in which range?
Isobaric range
Adiabatic range
Supersonic range
Hydrostatic range
To limit cabin pressure to a preset differential, the regulator controls the position of which valve?
Cabin outflow valve
Intake valve
Pressure relief valve
Fuel vent valve
Normal operation of the cabin air pressure regulator requires which operator inputs?
Selection of the desired cabin altitude
Adjustment of the barometric scale
Selection of the cabin rate of climb
Selection of wing anti-ice temperature
The position of the outflow valve directly controls the amount of what, thereby determining cabin pressure?
Cabin air allowed to leave the pressure vessel
Oxygen flow to passenger masks
Engine bleed air temperature
Hydraulic fluid return to reservoir
Pressurized aircraft require a negative pressure relief valve that opens under which condition?
Outside air pressure is greater than cabin pressure
Cabin pressure is greater than outside air pressure
Cabin temperature exceeds outside temperature
Outside humidity drops below cabin humidity
The vacuum relief valve described for pressurized aircraft is best characterized as what type of mechanism?
A flapper valve hinged to its seat
A variable-orifice needle valve
A gear-driven poppet valve
An electrically actuated solenoid valve
What are stated reasons for providing emergency oxygen to passengers via the passenger oxygen system?
Rapid cabin decompression due to a failure in the pressurization system
Insufficient cabin air inflow
Routine altitude changes during normal climb
Engine thrust limiting activation
Aircraft pneumatic systems may interface with which other aircraft systems, as listed?
Air conditioning system
Auxiliary power unit (APU)
Wing and tail anti-ice system
Engine and APU fire extinguishing system
Engine thrust control and limiting system
