Hydraulics Flashcards Preview

CL-65 (900) Study Guide > Hydraulics > Flashcards

Flashcards in Hydraulics Deck (49):
1

Left thrust reverser is controlled by which Hydraulic system?

#1

2

Right thrust reverser is controlled by which Hydraulic system?

#2

3

Outboard brakes are controlled by which Hydraulic system?

#2

4

How many PSI are the hydraulic systems?

3000 psi

5

When will Pumps 1B, 2B, and 3B automatically start?

pumps will operate when their respective buses are powered, any generator operating and flaps out of zero

6

Which pump is automatically powered by the ADG bus?

3B

7

Which pump operates continuously with the switch on?(No auto mode)

3A

A image thumb
8

Which system operates Inboard brakes?

3

9

Which system operates Nose wheel Steering?

3

10

Which system operates the Landing Gear?

3

11

Where is the service door for the HYD 3 system?

Right side behind the wing

 

A image thumb
12

What powers the Hyd 3 system?

Electric

 

A image thumb
13

Which pumps are considered "Full Time Pumps?"

"A" pumps

14

Which pumps are considered "Part Time" pumps?

"B" pumps

15

When will low pressure caution appear on the EICAS?

1800 psi

16

When will you get a high temperature caution on the EICAS?

96c

17

What is considered high pressure?

3200 psi

18

When will a pressure relief valve engage?

3750 psi

19

How many Hydraulic  System Accumulators on the CRJ?

Total of 5

  • One for each Hydraulic system (1,2,3)
  • One for each brake system (2)

20

What is the function of the Hydraulic Accumulators?

Dampens pressure surges

21

What are the Hydraulic Accumulators charged with?

Dry Nitrogen

22

What is the function of these HYD SOV switches?

Q image thumb

Isolates hydraulic fluid to respective EDP(Engine Driven Pump)

23

Which Hydraulic System(s) get serviced from the AFT Equipment Bay?

Systems 1 and 2

24

Does Pump 3B automatically start when the ADG is deployed?

Yes

25

With the switch in the AUTO position, will pump 3B be operating during normal takeoffs and landings?

Yes

26

Which ACMP is directly powered by the ADG?

3B

27

Will pumps 1B and 2B automatically turn on during an engine failure?

No, they must have the switches placed into the ON position 

28

Which Hydraulic systems are cooled with an air/oil heat exchanger?

Systems 1 and 2

29

What is the Normal percentage of Hydraulic fluid in the system?

45 to 85%

30

Where would you normally be able to read hydraulic brake pressure?

Hydraulic synoptic page

31

Where can the hydraulic system be viewed on EICAS under normal operating conditions?

The EICAS ED2 Hydraulic synoptic page

32

What activates the hydraulic shutoff valve at the engine firewall?

HYD SOV switch, and ENGINE FIRE PUSH switch

33

Which Hydraulic pumps are engine driven?

1A, 2A

34

How are hydraulic systems #1 and #2 cooled?

Ram air / oil heat exchanger

35

System 3 is powered by how many AC motor pumps?

2

36

During normal operations, system 1 provides hydraulic pressure to?

  • Rudder and Elevator
  • Left Aileron
  • Outboard Multifunction spoiler panels
  • Outboard ground spoilers
  • Left Thrust Reverser

37

During normal operations, system 2 provides hydraulic pressure to?

  • Rudder and Elevator
  • Right Aileron
  • Inboard multifunction spoiler panels
  • Main Landing Gear Auxiliary Actuators
  • Landing Gear Alternate Extension
  • Right Reverser
  • Outboard Brakes

38

With normal switch positions, which electric hydraulic pump normally operates continuously?

3A

39

System 3 provides hydraulic pressure to?

  • Rudder and elevators
  • Left and right aileron 
  • Inboard ground spoilers
  • Landing gear 
  • Nosewheel steering 
  • Inboard brakes 

40

How many hydraulic systems are normally used to power the rudder?

3

41

The CRJ has how many hydraulic pumps?

6

42

Your at the gate with only the APU running. Which hydraulic pumps can operatate?

All the electric pumps

43

You are taxiing out single engine (right engine running). Which hydraulic pumps are running in normal operations(flaps up)?

3A and 2A

44

With the No.1 engine shutdown in flight, which hydraulic pumps are not available?

1A

45

The A pumps are engine-driven, and the B pumps are electric AC motor pumps?

False, pump 3A is an AC electric pump

46

What is considered low hydraulic pressure?

<1800 psi

47

What is considered high hydraulic pressure?

>3200psi

48

What hydraulic system(s) power the inboard Ground Spoilers?

#3 system

49

What Hydraulic system(s) power the Left Aileron?

#1 and #3