Hydraulic Flashcards
With the switch in the auto position, pump 3B will be operating during normal takeoffs and landings.
True
Pump 3B is automatically running during a complete AC power failure: T/F
True
What is normal hydraulic system pressure
3000 PSI
What ACMP (AC Motor Pump) is directly powered by the ADG during an AC power failure?
3B is automatically powered during an AC power failure by the ADG when it is deployed.
What is the normal percentage of hydraulic fluid in the system
45% – 85%
AC motor pumps 1B and 2B Will automatically turn on during an engine failureT/F
False. You gotta turn them on.
What does a half-intensity cyan display of an engine on the EICAS hydraulic page indicate?
Engine is running
Where would you normally be able to read the hydraulic brake pressure
On the hydraulic synoptic page
Where can the hydraulic system be viewed on the EICAS under normal operating conditions
The EICAS ED2 hydraulic synoptic page
What activates the hydraulic shut off valve at the engine firewall?
Engine fire push switch light
When the hydraulic pumps one and two are set to AUTO, When will the pumps automatically start?
Any generator online and flaps are out of the 0° position
Which hydraulic pumps are Engine driven
1A and 2A
How are hydraulic systems # 1 and # 2 cooled?
Ram air/oil heat exchangers
True or false: Systems one and two are each powered by an EDP and an AC motor pump.
True
Hydraulic system 3 is powered by how many AC-motor pumps?
Two
During normal operations, System one provides hydraulic pressure to
Outboard multifunction spoiler panels
With normal switch positions, which electric Hydraulic pump normally operates continuously?
3A
System 3 provides hydraulic pressure to
Inboard brakes
System 2 provides hydraulic pressure to
Right side primary flight controls
right side spoileron
outboard brakes
How many hydraulic systems are normally used to power the rudder
Three systems
How many hydraulic pumps does the CRJ have?
6 - 2 engine driven and 4 electric
You are at the gate with only the APU running. Which hydraulic pumps can operate?
All the electric pumps
You’re taxiing out on a single engine (right engine). Which hydraulic pumps are running in normal operations (flaps up)
3A and 2A
The A pumps are engine driven, and the B pumps are electric AC motor pumps
False
What is considered low hydraulic pressure?
1800 PSI
What is considered high hydraulic pressure?
3200 PSI (amber)
What hydraulic system power the inboard ground spoilers
3 system
With the No. 1 engine shutdown in flight, which hydraulic pumps are not available?
1A
How many pumps does each hydraulic system have?
2
Which hydraulic system does not use a heat exchanger?
Hydraulic system 3
What hydraulic systems power the left aileron?
1and #3 systems
What psi will hydraulic fluid see the relief pressure overflow?
3750 psi
