WorksheetsHydraulic, Ice & Rain and Landing Gear Systems
Total questions: 34
Worksheet time: 17mins
What type of hydraulic system use in large aircraft?
Closed hydraulic system.
Open hydraulic system.
Simple hydraulic system.
Which of the following characteristics are essential for an effective hydraulic fluid?
Low viscosity, high thermal stability, high flash point & low toxicity.
High viscosity, low thermal stability, low flash point & high toxicity.
Medium viscosity, high thermal stability, high flash point & low toxicity.
Which component is responsible for diverting hydraulic fluid back to the system when the primary filter becomes obstructed?
pressure relief valve.
by-pass valve.
flow control valve.
When working on a hydraulic operated flight control it is sensible to
remove and depressurize the hydraulic power.
remove and disconnect electrical power.
pull the appropriate circuit breaker.
The hydraulic component that automatically directs fluid from either the normal source or an emergency source to an actuating cylinder generally referred to as
check valve.
shuttle valve.
flow regulator.
If the pilot selected the landing gear control to' up position' and during the transition suddenly the landing gear stuck. What is the most probable faulty valve?
Shuttle valve.
Sequence valve.
Selector valve.
In a hydraulic pump, a mechanical safety device use to protect the pump from overload or damage is the
shear pin.
check valve.
regulator valve.
What type of valve in an aircraft hydraulic system permits fluid to flow freely in one direction, but restricts the flow in the opposite direction?
Shuttle valve.
Orifice check valve.
Check valve.
A red indicator button sticking up on the top of a hydraulic filter is an indication that the filter element is
blocked or contaminated.
not install properly.
filter malfunction.
Which of the following component to component pipelines are identified as a case drain line
from selector valve to reservoir.
from reservoir to pump.
from pump to reservoir.
This type of ice is a glassy transparent or whitish form of ice that adheres tenaciously to exposed surface.
glaze Ice.
rime Ice.
hoar Frost.
Windshield heating provides
thermal expansion for a tighter fit.
impact resistance enhancement.
increases strength to resist cabin pressure
The heater operation of the pitot static system can be checked on the ground by
air data computer.
central maintenance computer.
control display unit.
When testing pitot head heaters.
they can only be checked by noting the temperature rise on the probe.
they must only be switched on for the minimum time required to check serviceability.
they should be switched on for five minutes to allow to stabilize before taking ammeter readings.
A rotary knife edge ice detector provides warning of ice by
increased torque on the rotor.
increased sharpness on the knife edge.
stopping the rotation of a rotary knife edge.
The type of ice detection system that use the frequency principle is
rotary knife edge ice detector
frequency probe ice detector.
pressure probe ice detector.
On large transport aircraft, the windshield wiper system is
one system for both sides but with the same power source.
independent on each side but with the same power source.
independent on each side with different power sources.
The typical aircraft hydraulic system pressure is
3000 psi.
1000 psi.
300 psi.
How hydraulic fluid frothing is prevented?
By pressurizing.
By vent Reservoir to atmosphere.
By passing over a tray.
The arrangement of several selector valves on the Open Centre Hydraulic System is arranged
in parallel.
in series.
incorporated.
The correct method to check the quantity of hydraulic fluid in reservoir is by
reading from a gauge in accumulator.
reading from a sight gauge or dip stick.
removing filler cap and visual check.
A hydraulic accumulator is charged with initial air pressure of 1000 PSI. When the hydraulic system pressure of 3000 PSI is reached, the air pressure is
4000 PSI.
3000 PSI.
1000 PSI.
What is the purpose of a 'cut-out' in a hydraulic system?
To prevent creep in jack operated services which have several selected positions.
To limit loss of fluid in the event of pipe fracture.
To relieve the pump of load when the no service has been selected.
When a vibrating rod ice detector has de-iced, the warning lamp on the flight deck
goes out immediately.
goes out after one more cycle.
goes out after a set period of time.
The 'hot rod' type of ice detector is switched on
all the time.
when selected by the crew.
in the air.
What is the diagonal part of the landing gear called?
Drag Strut
Drag Wire
Shock Absorber
When the landing gear is locked up, the cockpit indicator shows
Red light
No indication
Green light
A red dot or triangle mark on aircraft tyres means
military reference.
the light part of the tyre.
breather points.
Type of strut designed to stabilize the landing gear assembly longitudinally is the
side brace.
Drag strut.
truck.
Spongy brakes are usually the result of
internal leakage.
air in the system.
external leakage.
In an anti-skid system
brakes release on falling torque.
brakes release on rising torque.
brakes are modulated to give most efficient braking.
Why is a hydraulic damper fitted to a nose wheel steering system?
To reduce vibration and shimmy.
To centralise the nose wheel during an up selection.
To centralise the nose leg assembly during an up selection
What is the down lock mechanism for landing gear of the modern aircraft?
Via downlock box and roller
Via geometric locks
Via landing gear actuator
In case of electrical gear indication failed, how to ensure the landing gear is in the down locked position?
Pilots need to check the mechanical indicator.
Pilots need to check visually with the people on the ground
Pilots need to monitor the warning light on instrument panels.
