gas turbine auxiliary power unit and engine starting

#1. Which of the following statements would be more correct with regard to an APU?

• AAPU’s provide emergency hydraulics power for the brakes only.
• BAPU’s provide electrical, pneumatic and hydraulic power for ground use only.
• CAPU’s provide electrical, pneumatic and hydraulic power for air use only and can provide an amount of thrust.
• DAPU’s provide electrical, pneumatic and hydraulic power for ground and air use and can provide an amount of thrust.

#2. In the event of a fire in an APU:

• AWill need to be shut down immediately.
• BWill shut down immediately.
• CWill shut down immediately and if the fire persists the fire bottles will automatically be fired.
• DWill need to be shut down immediately and the fire bottles will be required to be fired immediately.

#3. Which of the following would result in an automatic shut down of an APU?

• Aoverspeed of compressor
• Bover-temp of lubrication system
• Cturbine over-temp
• Dcombustion chamber over-temp