Hydraulic Systems Flashcards
The center hydraulic system has an isolation function which _____.
A. Ensures the flight crew can lower the landing gear.
B. Allows nosewheel steering to be operational for landing, rollout and taxi.
C. May be activated by the flight crew by deselecting the C1 and C2 hydraulic pump switches in flight.
D. A and B are correct.
D. A and B are correct.
Normal brakes are powered ______.
A. Hydraulically by the right system.
B. Hydraulically by the center system.
C. Electrically.
D. None of the above.
C. Electrically.
The Center Demand pump operates ______?
A. On the ground for the first three minutes after the second engine is started.
B. From T/O thrust set until above 2000ft RA and during descent with the gear handle down and the RA is less than 2000ft until groundspeed is below 60kts.
C. Flaps and Slats are in motion.
D. All the above.
D. All the above.
The left hydraulic system powers which systems?
A. Alternate & Reserve brake system.
B. Nose Gear Steering.
C. Some flight controls and left engine thrust reverser.
D. Stabilizer Trim.
C. Some flight controls and left engine thrust reverser.
What is the minimum number of hydraulic systems required for “adequate airplane controllability”?
A. One
B. Two
C. Three
A. One
With the left or right hydraulic demand pump selectors in the AUTO position, which of the following is true?
A. Pumps operate from takeoff thrust set to flaps retracted.
B. Pumps operate with system low pressure.
C. Pumps operate during thrust reverser operation.
D. All the above.
D. All the above.
Which hydraulic pump(s) may be shed to allow the electrical system to provide power to other systems?
A. Center demand pump.
B. Left Demand Pump.
C. Right Demand Pump.
D. All the above.
D. All the above.
The hydraulic isolation system ensures:
A. Center hydraulic system pressure to the flight controls.
B. Pressure to the Reserve Brakes.
C. Landing gear can be lowered and nose wheel steering operates.
D. Pressure to the Normal Brakes.
C. Landing gear can be lowered and nose wheel steering operates.
Which of the following will cause the RAT to deploy automatically in flight?
A. Loss of two electric motor pumps (EMP).
B. Loss of electrical power to the FO’s flight instrument bus.
C. Loss of any two hydraulic systems.
D. Left, Center, and Right Hydraulic pressure low.
D. Left, Center, and Right Hydraulic pressure low.
What component(s) does the RAT hydraulically power?
A. Alternate gear extension system.
B. Normal brakes (after landing and airspeed below 60 kts).
C. Primary flight control components normally powered by the center hydraulic system.
D. All of the above.
C. Primary flight control components normally powered by the center hydraulic system.
Autoland is inoperative for which of the following conditions?
A. Center primary hydraulic pump pressure is low.
B. Right hydraulic demand pump is inoperative.”
C. Autoland is always available.
D. Left and right hydraulic system pressure is low.
D. Left and right hydraulic system pressure is low.
What happens if both the C1 and C2 Pump selectors are positioned to ON at the same time?
A. Both pumps will run.
B. Only the C2 pump will operate.
C. Only the C1 pump will operate.
D. Both the C1 and C2 pumps will operate only if the L or R PRIMARY pump has low pressure.
A. Both pumps will run.
Which of the following components are powered by the right hydraulic system?
A. Normal brakes.
B. Some flight controls.
C. Right engine thrust reverser.
D. Both B and C are correct.
D. Both B and C are correct.
How or when is the Ram Air Turbine (RAT) deployed?
A. Manually by pushing the guarded RAT switch on the overhead panel.
B. Automatically with the loss of all four EMPs and an engine failure on takeoff or landing.
C. Automatically, with the loss of Captain and F/O Instrument busses.
D. All the above.
D. All the above.
The primary hydraulic pump FAULT lights illuminate (amber) when the following occurs:
A. Low primary pump pressure.
B. Excessive primary pump fluid temperature.
C. Pump selected OFF.
D. All the above.
D. All the above.
