Hydraulic Systems

Question 1

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.

Answer 1

D. A and B are correct.

Question 2

Normal brakes are powered ____.
A. Hydraulically by the right system
B. Hydraulically by the center system
C. Electrically
D. None of the above

Answer 2

C. Electrically

Question 3

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 decent when RA is less than 2000ft until groundspeed is below 60kts.
C. Flaps and Slats are in motion.
D. All the above

Answer 3

D. All the above

Question 4

The left hydraulic system powers which systems?
• Alternate & Reserve brake system
• Nose Gear Steering
• Some flight controls and left engine thrust reverser.
• Stabilizer Trim

Answer 4

• Some flight controls and left engine thrust reverser.

Question 5

What is the minimum number of hydraulic systems required for “adequate airplane controllability”?
• One
• None
• Two
• Three

Answer 5

• One

Question 6

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

Answer 6

D. All the above

Question 7

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

Answer 7

D. All the above

Question 8

The C1 Primary hydraulic pump & reserve fluid are dedicated to operating:
• Center hydraulic system flight controls.
• Reserve Brakes.
• landing gear actuation and nosewheel steering.
• Normal Brakes.

Answer 8

• landing gear actuation and nosewheel steering.

Question 9

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.

Answer 9

D. Left, Center, and Right Hydraulic pressure low.

Question 10

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.

Answer 10

C. Primary flight control components normally powered by the center hydraulic system.

Question 11

Auto land is inoperative for which of the following conditions?
• Center primary hydraulic pump pressure is low.
• Right hydraulic demand pump is inoperative.
• Autoland is always available.
• Left and right hydraulic system pressure is low.

Answer 11

• Left and right hydraulic system pressure is low.

Question 12

What happens if both the C1 and C2 Pump selectors are positioned to ON at the same time?
• Both pumps will run.
• Only the C2 pump will operate.
• Only the C1 pump will operate.
• Both the C1 and C2 pumps will operate only if the L or R PRIMARY pump has low pressure.

Answer 12

• Both pumps will run.

Question 13

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.

Answer 13

D. Both B and C are correct.

Question 14

The Ram Air Turbine (RAT) may be manually or automatically deployed.
A. True.
B. False

Answer 14

A. True.

Question 15

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.

Answer 15

D. All the above.

Question 16

In the AUTO position, the right hydraulic system demand pump:
A. Operates from takeoff thrust set to flaps retracted
B. Operates when system, or primary pump pressure is low.
C. With landing gear lever down and below 1000 RA to ground speed less than 40kts
D. All the above.

Answer 16

D. All the above.

Question 17

Where would you find hydraulic quantity indications?

A. Secondary Engine Instruments.
B. Status Display.
C. Hydraulic Synoptic.
D. Both B and C.

Answer 17

D. Both B and C.