Hydraulics Flashcards
Which of the following is not controlled by hydraulics?
These are: flight controls, landing gear, nose wheel steering, brakes.
What is the nominal pressure created by the engine-driven hydraulic pumps?
3000 psi.
What provides backup pressure created for the #1 hydraulic system?
Electrically powered standby hydraulic pump.
What is controlled by the #1 hydraulic system?
BARFPIE: brakes, anti-skid, rudder, flaps, PTU, inboard spoilers, elevator.
Which of the following is controlled by the #2 hydraulic system?
LOSERE: landing gear, outboard spoilers, steering, elevator, rudder, emergency/parking brake.
A minimum quantity of ____% must be present in the #1 and #2 hydraulic systems for aircraft dispatch.
40%.
A minimum quantity of ____% must be present in the #3 hydraulic system for aircraft dispatch.
45%.
T or F: the #1 hydraulic system can be powered by AC ground power and the standby hydraulic pump when the engines are shut down.
True.
T or F: both main hydraulic systems contain fuel/oil heat exchangers in the associated fuel tank to help cool the hydraulic fluid.
True.
T or F: the PTU can be turned on automatically or manually for the hydraulic systems.
True.
How many volts minimum are needed to run the DC motor pump for the #3 hydraulic system?
24V.
When running off of the DC motor pump, what does the #3 hydraulic system get pressurized at?
2600 - 3250 psi.
The auxiliary hydraulic system provides power for ____.
The alternate landing gear extension.
Nose wheel steering is powered by which hydraulic system?
2.
Normal hydraulic pressure from the engine driven hydraulic pump is approximately what PSI?
3000 psi.
What does the power transfer unit (PTU) do?
Uses the #1 system to pressurize the #2 system.
T or F: hydraulic system pressures and reservoir quantities are normally displayed at the bottom of the First Officer’s MFD.
True.
What electrical source does the standby hydraulic pump need to operate?
115V AC power.
T or F: the standby pump automatically activates when the #1 engine fails during flight.
True.
T or F: pilots can manually turn on the standby hydraulic pump.
True.
