CJR900 Systems Hydraulics

Question 1

What Pump is automatically running when the ADG is deployed

Answer 1

3B

Question 2

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

Answer 2

Yes

Question 3

What is normal Hydraulic system pressure

Answer 3

3000 PSI

Question 4

What ACMP is directly powered by the ADG

Answer 4

3B

Question 5

What is the Normal percentage of Hydraulic fluid in the system

Answer 5

45%-85%

Question 6

Will AC-motor pumps 1B and 2B will automatically turn on during an engine failure

Answer 6

No

Question 7

Where would you normally be able to read hydraulic brake pressure

Answer 7

On the hydraulic synoptic page

Question 8

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

Answer 8

The EICAS Hydraulic synoptic page

Question 9

What ways can the hydraulic shutoff valves be closed from the flight deck

Answer 9

1. ENGINE FIRE PUSH switch light

2. HYD SOV switch lights on the overhead panel

Question 10

When the hydraulic pump switch 1B and 2B are set to AUTO, when will the pumps automatically start

Answer 10

1. With at least one engine-driven generator, or the APU generator on line
2. Flaps are greater than 0 degrees

Question 11

Which hydraulic pumps are engine-driven

Answer 11

1A and 2A

Question 12

How are hydraulic systems #1 and #2 cooled

Answer 12

A ram air/oil heat exchanger

Question 13

Systems 1 and 2 are each powered by an EDP and an _____

Answer 13

AC motor pump

Question 14

System 3 is powered by AC-motor pumps

Answer 14

2

Question 15

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

Answer 15

3A

Question 16

How many hydraulic systems are normally used to power the rudder

Answer 16

3

Question 17

The CRJ has ____ hydraulic pumps

Answer 17

6 - two engine driven and four electric

Question 18

At cruise, which hydraulic pumps are operating during normal operations

Answer 18

1A, 2A, and 3A

Question 19

While taxiing out single engine (right engine running), which hydraulic pumps are running in normal operations (flaps up)

Answer 19

3A and 2A

Question 20

With the No. 1 engine shutdown in flight, which hydraulic pumps are affected

Answer 20

1A

Question 21

The ____ pumps are engine-driven

Answer 21

1A and 2A

Question 22

The ____ pumps are electric AC motor pumps

Answer 22

1B, 3A, 3,B, 2B

Question 23

What is considered low hydraulic pressure

Answer 23

< 1800 PSI

Question 24

What is considered high hydraulic pressure

Answer 24

> 3200 PSI

Question 25

When does hydrolic pressure relief occur

Answer 25

> 3750 PSI and excessive fluid is vented to an overflow bottle