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Crj 900 > Hydraulics > Flashcards

Hydraulics Flashcards

0
Q

Where is system three serviced

A

A ground service panel located on the right side of the fuselage aft of the wing root

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1
Q

All three hydraulic systems operate at what pressure

A

3000 PSI

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2
Q

Systems one and two are located

A

In the aft equipment bay

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3
Q

Which hydraulic systems are powered by more than one hydraulic system

A

Rudder elevators and ailerons

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4
Q

Spoilers?

A

Ground spoilers
Multifuncion spoilers
Aileron

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5
Q

Hydraulic. 1&2 Fluid cooling?

A

Both systems share a ram air heat exchanger for fluid cooling

(1&2)

A fan assists on the ground

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6
Q

AC motor pump 1B pwrd by?

                       2B.             ?
A

AC Pump 1B ……..AC BUS 2

AC pump 2B. ………AC BUS 1

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7
Q

When switch set to auto, pump will automatically start when..

A

Flaps are out of the 0° position

AC BUS 2 must b pwrd for 1B op
AC BUS 1 “. “. “. 2B

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8
Q

Do AC motor pumps 1B and 2B automatically start during or after an engine failure

A

No

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9
Q

HYDR SOV 1 or 2 OPEN caution?

A

Respective shutoff valve is open with an associated engine fire

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10
Q

Hydraulic system shut off valves are on what bus

A

DC emergency bus

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11
Q

Does hydraulic system number three have a heat exchanger

A

No

Hydraulic fluid lines run through the fuel tanks thereby allowing cooling

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12
Q

AC 3B fuel pump operates when?

A

During takeoff and landing

Independent of the 3-B switch setting

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13
Q

AC 3 A. Runs continuously to maintain normal system pressure?

A

Yes

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14
Q

AC 3B Will operates irrespective of switch position when

A

ADG is deployed

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15
Q

Hydraulic shut off valve position indicator shows half magenta

A

Failed

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16
Q

When are the AC pumps auto run?

A

Flaps out of 0°

Switch in auto

AC bus 1 and 2 powered

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17
Q

Do the hydraulic pumps operate in auto when flaps which is selected to 1°?

A

No

Because no flaps are xtended only 20° slats

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18
Q

Ram air scoop .. 3 things?

A

Cools hydraulic systems 1and 2

Pack cooling

Ram air

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19
Q

Which hydraulic system is the largest

A

3

20
Q

What is the purpose of the accumulators

A

To dampen pressure surges

And maintain system pressure

21
Q

Lose systems 1&2c

A

Main will free fall

Nose needs hydraulics to release uplocks

22
Q

Are the accumulators showing on the synoptic page?

A

No

23
Q

What do the accumulators do?

A

Store fluid under pressure

Dampens pressure surges

24
Q

What two ways can we close the hydraulic shut off valves

A

Engine fire push switch

Hydraulic SOV switch light

25
Q

Which hydraulic pump runs continuously

A

3A

26
Q

When in auto when will be B pumps operate?

A

Respective bus powered

Flaps greater than zero

Any generator operating

Thomas will not come on automatically if a loss of hydraulic pressure

27
Q

What does interlock a law regarding to B pumps?

A

Allows the B pumps to be turned on with no generator operating… on ground
(A C external power only)

28
Q

B Pumps will operate when in the “ON” position when?

A

Respective bus is powered

Any generator operating

*unless operating under the interlock feature,then no generator needs to be operating

29
Q

When does the hydraulic 3B pump operate regardless of switch position?

A

When the ADG is deployed

30
Q

Are the accumulators shown on the synoptic page?

A

No

31
Q

What are the accumulators do?

A

Store fluid under pressure

Dampens pressure surges

32
Q

What two ways can we close the hydraulic shut off valves

A

Engine fire push switch

Hydraulic SOV switch light

33
Q

Which hydraulic pump runs continuously

A

3A

34
Q

When in auto when will be B pumps operate?

A

Respective bus powered

Flaps greater than zero

Any generator operating

Thomas will not come on automatically if a loss of hydraulic pressure

35
Q

What does interlock a law regarding to B pumps?

A

Allows the B pumps to be turned on with no generator operating
(A C external power only)

36
Q

B Pumps will operate when in the on position when?

A

Respective bus is powered

Any generator operating

*unless operating under the interlock feature,then no generator needs to be operating

37
Q

When does the hydraulic 3B pump operate regardless of switch position?

A

When the ADG is deployed

38
Q

Where do I find the hydraulic fluid level chart

A

In the ODH

39
Q

The hydraulic shut off valves are operated ?

A

Electrically 11-10

Electrically operated hydraulic SOVs

40
Q

Which pumps are engine driven?

A

1A 2A

41
Q

If we lose hydraulics two and three?

A

Manuel freefall

Nose will not drop needs hydraulics

42
Q

Which flight controls do all three hydraulic systems power?

A

Rudder and elevators ailerons

43
Q

Where do I find the hydraulic fluid levels chart?

A

In the ODH 15-1

44
Q

Hydraulic pump 3B will operate Regardless of switch position!! 

A

When the ADG is deployed

45
Q

When will the AC hydraulic motor pumps operate in the auto mode

A

Flaps greater than 0

Cross side bus powered

Any generator operating

46
Q

If cation msg ….

“AC2 AUTOXFER” appears…

What hydraulics are affected?

A

Hydraulics 3 A .. Is off of AC BUS 2

47
Q

Hydraulic fluid quantity in the white?

A

45 to 85

48
Q

Hydraulic Amber?

A

Hi temp greater than 96°

Crj 900 (45 decks)

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