Hydraulics

Question 1

In the AUTO position, right demand pump ____.

Answer 1

runs continuously on the ground

Question 2

The Ram Air Turbine (RAT) can provide Hydraulic pressure to ____.

Answer 2

the center hydraulic system primary flight control components only

Question 3

The right hydraulic system pressurizes flight controls, ____.

Answer 3

normal brakes, and the right thrust reverser

Question 4

There are ____ independent hydraulic systems on the B777.

Answer 4

three (left, right, and center)

Question 5

Normal brakes are powered from ____ hydraulic system.

Answer 5

the Right

Question 6

The left and right hydraulic systems are each powered by ____.

Answer 6

engine driven and electric motor driven pumps

Question 7

The right hydraulic system demand pump is ____.

Answer 7

an electric powered pump

Question 8

The center hydraulic system demand pumps are ____.

Answer 8

Air Driven

Question 9

The center hydraulic system demand pumps____ .

Answer 9

provide supplementary hydraulic power for periods of high system demand

cannot operate simultaneously when both pumps are selected to ON

operate continuously on takeoff when selected to AUTO

All of the above

Question 10

Normal brakes operate using the ____ hydraulic system(s).

Answer 10

right

Question 11

Alternate brakes operate using the ____ hydraulic system(s).

Answer 11

center

Question 12

All hydraulic system quantities and pressures can be viewed on ____.

Answer 12

the hydraulic synoptic and status display

Question 13

Prior to engine start, ____.

Answer 13

pressurize the right hydraulic system first to prevent fluid transfer between systems

Question 14

During engine shutdown, ____.

Answer 14

turn off the right demand pump last

Question 15

If both of the center hydraulic system demand pumps are turned ON, then ____.

Answer 15

only C1 demand pump operates

Question 16

In flight, the RAT deploys automatically if:

Answer 16

Both engines are failed and center hydraulic system pressure is low; or all 3 hydraulic system pressures are low; or both AC transfer busses are failed

Question 17

What conditions will cause the Ram Air Turbine (RAT) to automatically deploy?

Answer 17

All of the above.

Both engines are failed and center hydraulic system pressure is low.

Both AC transfer busses are unpowered.

All three hydraulic system pressures are low.

Question 18

What occurs if both center hydraulic system demand pumps are turned to the ON position?

Answer 18

Only the C1 demand pump operates.

Question 19

With the left and right hydraulic demand pump selectors in the AUTO position, when will both pumps operate?

Answer 19

All of the above.

During landing.

During takeoff.

When system or primary pump pressure is low.

Question 20

With all hydraulic pumps selected to AUTO or ON, which center pump will load shed if only a single power source is available?

Answer 20

C2 primary pump

Question 21

Which of the following is the hydraulic function of the Ram Air Turbine (RAT)?

Answer 21

Provides hydraulic power to the center hydraulic system flight controls only.

Question 22

The right hydraulic system powers flight controls, normal brakes and the right thrust reverser.

Answer 22

True

Question 23

What components are powered by the center hydraulic system?

Answer 23

Flight controls and Flap/Slats.

Alternate/reserve brakes.

Landing gear actuation and Nose/Main gear steering.

All of the above.

Question 24

Where are hydraulic system pressure and quantity indications displayed?

Answer 24

The Status and Hydraulic Synoptic pages.

Question 25

What components are powered by the left hydraulic system?

Answer 25

Flight controls and the left engine thrust reverser.

Question 26

If a leak occurs in the center hydraulic system as shown, when low quantity is sensed, what action has happened in the hydraulic center system?

Answer 26

Both isolation valves close to protect alternate brakes and nose gear actuation and steering

Question 27

While in flight after a center hydraulic system fluid loss, what condition allows the right isolation valve to re-open?

Answer 27

It will not re-open. Maintenance must re-open it after the flight.

Question 28

With the EICAS HYD QTY LOW C and this synoptic indication, which of the following are true?

Answer 28

All the above. Pilots should anticipate possible complete loss of the center hydraulic system, and consider referring to that checklist. The left isolation valve will reopen when the landing gear is selected down and both left and right engine driven primary hydraulic pumps are providing normal pressure. Nose wheel steering may be slow to react.

Question 29

With this message displayed how will flap/slat operation be affected? HYD PRESS SYS C

Answer 29

Flaps/slats will operate in the Secondary mode.

Question 30

With these messages depicted, how do the flap/slats operate? SLATS PRIMARY FAIL FLAPS PRIMARY FAIL

Answer 30

Electrically, using the flap handle, with flap asymmetry protection in the secondary mode.

Question 31

With the flap/slats operating in the Secondary mode, what subsequent failure would require one to use the Alternate Flap/Slat mode of operation?

Answer 31

Flap/Slat Electronic Units (FSEUs) failure/malfunction

Question 32

The landing gear doors are operated by the ____ hydraulic system.

Answer 32

Center

Question 33

A landing gear door powered by the center hydraulic system fails to close after gear retraction. This is indicated by the ____.

Answer 33

EICAS advisory message GEAR DOOR

Question 34

After the EICAS advisory message GEAR DOOR is displayed, the affected gear door can be identified by ____.

Answer 34

selecting the GEAR synoptic

Question 35

If both of these pumps are selected ON, ____________. C1 AND C2 AIR DEMAND PUMPS

Answer 35

only C1 air driven pump operates

Question 36

In the scenario depicted by this synoptic with a dual engine failure in flight, the First Officers flight instrument go blank. Which of the following statements is correct?

Answer 36

RAT has shed electrical in order to maintain hydraulic pressure for flight controls, and main aircraft battery is powering the Standby Electrical System.

Question 37

After reviewing the synoptic, what center system components are now hydraulically powered?

Answer 37

Center Flight controls

Question 38

On approach at ORD and after landing gear extension, the crew sees this EICAS message. After placing the RIGHT DEMAND PUMP SELECTOR to ON, the caution message remains displayed. The ____ brake system will be used for braking. HYD PRESS SYS R

Answer 38

Alternate

Question 39

With the loss of normal braking, the brake system will switch over to the alternate system ____.

Answer 39

automatically

Question 40

For consideration upon landing, when using the Alternate braking system, will anti-skid be available?

Answer 40

Yes, tandem wheel pairs except the aft axle wheels are independent