Welcome to the PTC Avition online quiz!
The quiz will test and develope your understanding of the A320's Hydraulic System.
There are 10 questions to follow. Good luck!
What is the main reason aircraft have hydraulic systems?
It is used to extend the leading and trailing edge devices.
Hydraulics is a force multiplier which allows large surfaces to be easily moved in a large aircraft.
It is used to generate electrical energy.
There are 3 hydraulic systems, Green, Blue and Yellow. Are these systems independant?
No
Yes
How is the Green system powered?
Engine Driven Pump (EDP)
Electrical Pump
APU
In order to prevent cavitation, the hydraulic reservoirs are pressurised. Where does this pneumatic pressure come from?
They are pre-charegd on the ground.
HP Bleed air from engine 1 pressurises the system automatically.
The associated system is kept under pressure by the associated engine.
The APU bleed or its onside engine.
The A320's hydraulic system incorporates a Power Transfer Unit (PTU). What is the function of the PTU?
The PTU insures an adequate pressure is maintained in the system by pressurising the associated hydraulic system.
It is a bidirectional power transfer unit that enables the yellow system to pressurise the green system and visa versa.
The PTU allows for the transfer of hydraulic fluid from one system to another to allow for pressurisation in the case of a hydraulic leak.
The Green system has failed and the PTU is off. Will the Yellow system still be powered?
Yes
No
After landing will you be able to vacate the runway using the NWS (Nose Wheel Steering) if the Yellow system has failed?
Yes
No
You are in the aircraft before engine start and the cargo doors are open. Is it possible to close the cargo doors without starting the engines?
Yes, the APU can provide hydraulic pressure to the aircraft.
Yes, the yellow system is able to be pressurised with an electric pump/manual pump to operate the cargo doors.
No, at least one engine must be started, and that then enables the associated system to be pressurised.
The Blue hydraulic system is powered by an electric pump, which is left in the auto position. After what major action does this pump automatically turn on?
By pushing or turning on the blue systems electric pump via a push button.
After any engine start.
The Blue systems electric pump is activated when any source of electric power is available to the aircraft.
The aircrafts normal and alternate brakes are powered by the Green and Yellow system. After experiencing a Green and Yellow system low pressure, is braking still available and how would the hydraulics be powered?
The use of the parking brake only.
7 braking applications of max 1000 Psi, powered by the system accumulator.
Auto Brake is still available.
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