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

Hydraulics Flashcards

1
Q

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

A

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

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2
Q

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

A

Systems 1 and 2

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3
Q

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

A

45 to 85%

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4
Q

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

A

Hydraulic synoptic page

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5
Q

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

A

The EICAS ED2 Hydraulic synoptic page

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6
Q

What activates the hydraulic shutoff valve at the engine firewall?

A

HYD SOV switch, and ENGINE FIRE PUSH switch

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7
Q

Which Hydraulic pumps are engine driven?

A

1A, #2A

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8
Q

How are hydraulic systems #1 and #2 cooled?

A

Ram air / oil heat exchanger

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9
Q

System 3 is powered by how many ACMP (motor pumps)?

A

2 ACMP

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10
Q

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

A

3A

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11
Q

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

A

3 systems

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12
Q

The CRJ has how many hydraulic pumps?

A

6 - two engine-driven, four electric

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13
Q

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

A

All the electric pumps

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14
Q

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

A

3A and 2A

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15
Q

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

A

1A

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16
Q

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

A

False, pump 3A is an AC electric pump

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17
Q

What is considered low hydraulic pressure?

A

<1800 psi

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18
Q

What is considered high hydraulic pressure?

A

> 3200psi

19
Q

Outboard brakes are controlled by which Hydraulic system?

A

2

20
Q

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

A

Systems 1 and 2

21
Q

Which system operates the Landing Gear?

A

3

22
Q

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

A

Yes

23
Q

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

A

Yes

24
Q

Which ACMP is directly powered by the ADG?

A

3B

25
Q

What is normal Hydraulic System pressure?

A

3000 PSI

26
Q

Which pump is automatically powered by the ADB bus?

A

3B

27
Q

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

A

3A

28
Q

Which system operates the inboard brakes?

A

3

29
Q

Which system operates the nose wheel steering?

A

3

30
Q

Where is the service door for the HYD #3 system?

A

Right side behind the wing?

31
Q

What powers the HYD #3 system

A

2 electric pumps

32
Q

Which pumps are consider “Full Time Pumps?”

A

“A” pumps

33
Q

Which pumps are consider “Part Time Pumps?”

A

“B” pumps

34
Q

When will a low pressure caution appear on the EICAS?

A

1800 psi

35
Q

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

A

96 * C

36
Q

When will pressure relief valve engage?

A

> 3750 psi

37
Q

How many Hydraulic System Accumulators on the CRJ?

A

Total of 5
One for each Hydraulic System (123)
One for each brake system (2)

38
Q

What is the function of the Hydraulic Accumulators?

A

Dampens pressure surges

39
Q

What are the Hydraulic Accumulators charges with?

A

Dry Nitrogen

40
Q

What is the function of the HYD SOV switches?

A

Isolates hydraulic fluid from flowing to respective EDP (ENG Driven Pump)

41
Q

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

A

Any generator is operating and flaps out of zero.

42
Q

When will hydraulic pump 3B operate?

A

Switch ON
or switch AUTO and at least one generator online and flaps out of Zero
ADG delpoyed

43
Q

What type and color of hydraulic fluid is used?

A

Skydrol, purple

CL-65(900) Study Guide Mesa (3 decks)

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