B777 Hydraulics
- 1.
How many hydraulics system are needed to provide adequate airplane controllability required for safe flight?
- A.
One system
- B.
Two system
- C.
Three system
- D.
Four system
Correct Answer
A. One system -
- 2.
Where are hydraulic system quantities displayed?
- A.
Status display
- B.
Hydraulic synoptic display
- C.
Secondary engine display
- D.
Hydraulic synoptic display and status display
Correct Answer
D. Hydraulic synoptic display and status display -
- 3.
Which of the following will cause the RAT to automatically deploy in flight?
- A.
Both AC transfer busses are unpowered.
- B.
Left engine is failed and center hydraulic system pressure is low.
- C.
Left AC transfer bus and right main AC bus are unpowered.
- D.
Center and right hydraulic system pressures are low.
Correct Answer
A. Both AC transfer busses are unpowered. -
- 4.
Following automatic deployment of the RAT due to system failures what systems receive hydraulic power from the RA T?
- 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 primary flight control components.
Correct Answer
C. Primary flight control components normally powered by the center hydraulic system. -
- 5.
What happens if both C1 and C2 DEMAND pump selectors are positioned to ON?
- A.
Only the C1 DEMAND pump will operates.
- B.
Only the C2 DEMAND pump will operate.
- C.
Both the C1 and C2 DEMAND pumps will operate.
- D.
Both the C1 and C2 DEMAND pumps will operate only if a C1 or C2 PRIMARY pump has low pressure.
Correct Answer
A. Only the C1 DEMAND pump will operates. -
- 6.
What condition does not cause the amber Demand Pump FAULT light to illuminate?
- A.
There is low demand pump output pressure.
- B.
Both C1 and C2 demand pump selector switches are ON.
- C.
The demand pump is selected off.
- D.
There is excessive demand pump fluid temperature.
Correct Answer
B. Both C1 and C2 demand pump selector switches are ON. -
- 7.
In flight, what condition does not cause the RAT to deploy automatically?
- A.
Both engines are failed and the center hydraulic system pressure is low.
- B.
Both AC transfer busses are unpowered.
- C.
All these hydraulic system pressure are low.
- D.
All center hydraulic system primary and demand pumps fail.
Correct Answer
D. All center hydraulic system primary and demand pumps fail. -
- 8.
What is the function of the AUTO position for the hydraulic DEMAND Pump selectors?
- A.
The pump is automatically “load shed” during periods of high electrical demand.
- B.
The pump operates when control logic anticipates a large system demand.
- C.
The AUTO function will terminate pump operation for high fluid temperature.
- D.
The pump operates automatically when engines are started.
Correct Answer
B. The pump operates when control logic anticipates a large system demand. -
- 9.
When will the left or right Shutoff Valve-(SOV) indicate closed on the Hydraulic synoptic display?
- A.
When system logic determines that the reserve brakes and nose gear steering need to be isolated.
- B.
When the respective system quantity is sensed to be low.
- C.
When the respective system pressure is sensed to be low.
- D.
When the respective Fire switch is pulled.
Correct Answer
D. When the respective Fire switch is pulled. -
- 10.
Which of the following systems does not right hydraulic system normally power?
- A.
Flight Controls.
- B.
Alternate breaks.
- C.
Both engine thrust reversers.
- D.
Nose wheel steering.
Correct Answer
A. Flight Controls. -
- 11.
During center hydraulic system non-normal operations, which statement is correct when center system quantity is sensed to be low and airspeed is greater than 60 knots?
- A.
The isolation valve close to isolate the flight controls from the center system.
- B.
Nose gear actuation and steering are isolated.
- C.
Main gear actuation and steering are isolated.
- D.
Thrust reversers are isolated.
Correct Answer
B. Nose gear actuation and steering are isolated. -
- 12.
What do the white letters RF mean when displayed beside the hydraulic QTY on the Status synoptic display?
- A.
The respective hydraulic system is “Reservoir Full”
- B.
There is RF interference in the hydraulic system.
- C.
The reservoir requires refilling. The RF is inhibited in flight.
- D.
RF means it is the reference limit.
Correct Answer
C. The reservoir requires refilling. The RF is inhibited in flight. -
- 13.
The airplane has 3 independent hydraulic systems, which of the following airplane systems is not powered by at least one of those hydraulic systems?
- A.
Hydraulic reservoir pressurization.
- B.
Leading edge slats.
- C.
Nose and main gear steering.
- D.
Thrust reversers.
Correct Answer
A. Hydraulic reservoir pressurization. -
- 14.
Which statement about the hydraulic systems is true?
- A.
Hydraulic fluid is supplied to each hydraulic pump from the single center reservoir.
- B.
The demand pumps for the left and right system are bleed air driven.
- C.
Flight control system components are distributed so that any one hydraulic system can provide adequate airplane controllability.
- D.
The left and right primary pumps are electric driven.
Correct Answer
C. Flight control system components are distributed so that any one hydraulic system can provide adequate airplane controllability. -
- 15.
Which statement is not true with both of the center hydraulic system DEMAND C1 and C2 pump switches in the AUTO position.
- A.
A demand pump operates when system pressure is low.
- B.
A demand pump operates when system logic anticipates a large demand.
- C.
A demand pump operates when a primary pump pressure is low.
- D.
The demands pumps provide a backup power source for the air-driven-primary pumps.
Correct Answer
D. The demands pumps provide a backup power source for the air-driven-primary pumps. -
- 16.
Which statements is true concerning center hydraulic system non-normal operation if quantity is sensed to be low and airspeed is greater than 60 knots?
- A.
Reserve brakes are isolated from the center system and remain operable.
- B.
Nose gear actuation and steering are reconnected.
- C.
Leading edge slats are isolated and can operate in the primary mode.
- D.
All are correct.
Correct Answer
A. Reserve brakes are isolated from the center system and remain operable. -
- 17.
Which statement concerning nose gear actuation and steering is not true?
- A.
It is reconnected to the center hydraulic system when airspeed decreases below 60 knots.
- B.
It is reconnected to the center hydraulic system when hydraulic pressure to the center system flight controls goes low.
- C.
It is reconnected to the center hydraulic system when the landing gear is selected down, both engines are normal, and both engine-driven pumps are providing pressure.
- D.
It is reconnected to the center hydraulic system when the system determines that both engines have been running for more than 30 seconds.
Correct Answer
D. It is reconnected to the center hydraulic system when the system determines that both engines have been running for more than 30 seconds. -
- 18.
What is the power source for the C1 and C2 hydraulic system primary pumps?
- A.
They are bleed air driven
- B.
They are electric-motor driven.
- C.
They are engine driven.
- D.
They are ram air turbine driven.
Correct Answer
B. They are electric-motor driven. -
- 19.
Which of the following will not cause the RAT to automatically deploy in flight?
- A.
Both engines are failed and the center hydraulic pressure is low.
- B.
Both AC transfer busses are unpowered.
- C.
All three hydraulic system pressures are low.
- D.
Both engines are failed.
Correct Answer
D. Both engines are failed. -
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Mar 20, 2022Quiz Edited by
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Feb 13, 2011Quiz Created by
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