CJR900 Systems Hydraulics Flashcards
What Pump is automatically running when the ADG is deployed
3B
With the switch in the AUTO position, will Pump 3B be operating during normal takeoffs and landings
Yes
What is normal Hydraulic system pressure
3000 PSI
What ACMP is directly powered by the ADG
3B
What is the Normal percentage of Hydraulic fluid in the system
45%-85%
Will AC-motor pumps 1B and 2B will automatically turn on during an engine failure
No
Where would you normally be able to read hydraulic brake pressure
On the hydraulic synoptic page
Where can the hydraulic systems be viewed on EICAS under normal operating conditions
The EICAS Hydraulic synoptic page
What ways can the hydraulic shutoff valves be closed from the flight deck
- ENGINE FIRE PUSH switch light
2. HYD SOV switch lights on the overhead panel
When the hydraulic pump switch 1B and 2B are set to AUTO, when will the pumps automatically start
- With at least one engine-driven generator, or the APU generator on line
- Flaps are greater than 0 degrees
Which hydraulic pumps are engine-driven
1A and 2A
How are hydraulic systems #1 and #2 cooled
A ram air/oil heat exchanger
Systems 1 and 2 are each powered by an EDP and an _____
AC motor pump
System 3 is powered by AC-motor pumps
2
With normal switch positions, which electric hydraulic pump normally operates continuously?
3A
How many hydraulic systems are normally used to power the rudder
3
The CRJ has ____ hydraulic pumps
6 - two engine driven and four electric
At cruise, which hydraulic pumps are operating during normal operations
1A, 2A, and 3A
While taxiing out single engine (right engine running), which hydraulic pumps are running in normal operations (flaps up)
3A and 2A
With the No. 1 engine shutdown in flight, which hydraulic pumps are affected
1A
The ____ pumps are engine-driven
1A and 2A
The ____ pumps are electric AC motor pumps
1B, 3A, 3,B, 2B
What is considered low hydraulic pressure
< 1800 PSI
What is considered high hydraulic pressure
> 3200 PSI
