Hydraulics

Question 1

There are 4 independent systems driven by

Answer 1

EDP (Engine driven pumps) & Demand pumps ()

Question 2

Systems 1 and 4 have demand pumps.

Answer 2

ADP (Air Driven) ()

Question 3

Systems 2 and 3 have demand pumps.

Answer 3

ACMP (AC electric) ()

Question 4

The _____ Aux Pump works with System fluid.

Answer 4

4

Question 5

The Aux pump is operated by a _____system.

Answer 5

electric ()

Question 6

The Aux pump can be used both on the ground and in the air. True or False

Answer 6

False. Ground use only, for breaking and MX purposes ()

Question 7

What hydraulic system powers the alternate brakes and the body gear steering system?

Answer 7

System 1 only (FCOM 13.20.2)

Question 8

What hydraulic system powers the respective autopilot servos?

Answer 8

3 Left Autopilot, 1 Center Autopilot and 2 Right Autopilot (FCOM 13.20.2)

Question 9

What causes the EICAS message “HYD PRESS DEM” to remain displayed after the selector has been placed in the ON position?

Answer 9

Pump pressure low.

Question 10

<p>Select the correct statement:</p>

Answer 10

<p>Demand pumps 1 &amp; 4 operate pneumatically. Electric power is required for EDP aux pump</p>

Question 11

The electric AUX pump in system 4 …

Answer 11

Will produce normal breake pressure when on the ground

Question 12

Demand selector 4 is in AUX. Select the correct statement…

Answer 12

The AUX pumps stops when EDP provides pressure

Question 13

The EDPs can not deliver hydraulic pressure …

Answer 13

While engines are not running, and engine pump not switched ON, and eng fire switch pulled ()

Question 14

<p>With flaps in landing position during approach ...</p>

Answer 14

<p>HYD 1 &amp; 4 demand pumps activate ()</p>

Question 15

Engine 3 is shut down due to a fire warning and the fire switch is pulled, and fuel control switch 3 in CUTOFF. Select the correct statement:

Answer 15

EDP depressurizes, and the respective demand pump operates, SOV 3 closed

Question 16

You are on approach selecting flaps 5. HYD PRESS DEM 1 message appears. What should be done?

Answer 16

Possible auto logic failure. Turn HYD 1 demand pump on ()

Question 17

Which abnormal condition does not trigger the SYS FAULT light?

Answer 17

system reservoir pressure low ()

Question 18

The beeper sounds and hydraulic SYS FAULT light 2 is on. Which message triggers the EICAS caution alert?

Answer 18

HYD PRESS SYS 2 (FCOM Chapter 13 Section 30)

Question 19

During flap extension while taxiing out, the SYS FAULT light 4 illuminates and the message HYD OVHT 4 appears. What describes the situation correctly?

Answer 19

Excessive hydraulic temp. detected. (When temp above 105 deg) possible overheated pump. ()

Question 20

What conditions would cause the DEMAND pumps to operate with the selector in the AUTO position?

Answer 20

Respective engine output pressure low or fuel control switch in cutoff. ()

Question 21

When the #1 EDP switch is ON, when will the #1 engine produce pressure?

Answer 21

Eng rotates ()

Question 22

What condition would automatically command Hydraulic demand pumps #1 and #4 to operate?

Answer 22

TE flaps in transit, or flaps extended with engines IDLE ()

Question 23

What causes the EICAS message “HYD PRESS DEM 4” to be displayed?

Answer 23

Selector in AUX position after ENG startup

Question 24

The HYDRAULIC demand pump in System 4 is disabled when the system 4 demand pump selector is in the AUX position. True or False

Answer 24

TRUE ()

Question 25

With a HYDRAULIC system 1 failure, what capability is lost?

Answer 25

Center Autopilot, Inboard TE flap, Nose & Body Steering\actuation, Left outboard elevator ()