Results
Q1. Which of the following statements would be more correct with regard to an APU?
Correct answer is – APUs provide electrical, pneumatic and hydraulic power for ground and air use and can provide an amount of thrust
Q2. In the event of an APU fire on the ground it:
Correct answer is – will auto shutdown and fire bottle automatically operate
Q3. Which of the following would result in an automatic shutdown of an APU? 1. Overspeed of compressor 2. Over-temp of lubrication system 3. Turbine over-temp 4. Combustion chamber over-temp 5. Compressor outlet pressure exceeded 6. Low pressure of lubrication system
Correct answer is – 1, 2, 3 and 6
Q4. A Ram Air Turbine is used to provide:
Correct answer is – emergency hydraulic power for the elevator, rudder and ailerons along with possible emergency electrical power
Q5. The power to start an APU comes from:
Correct answer is – aircraft main DC battery
Q6. A typical APU can provide:
Correct answer is – all of the above
Q7. The advantage of an air starter system is that:
Correct answer is – it is light, simple and economical
Q8. A “Hung Start” is indicated by:
Correct answer is – high EGT, idle fuel flow, low rpm
Q9. If a gas turbine engine fails to light up within the specified time:
Correct answer is – it must be motored over with the HP fuel cock shut and no igniters selected
Q10. A Relight is:
Correct answer is – the action of restarting a flamed out engine, usually while airborne
Q11. A “Hung Start” occurs when:
Correct answer is – the engine lights up but does not accelerate to self-sustaining speed
Q12. After engine start, the engine igniters are normally deactivated by:
Correct answer is – a speed switch
Q13. Failure of the engine to light up is shown by:
Correct answer is – low rpm fuel flow indication, and no TGT
Q14. The term “self sustaining speed” means that:
Correct answer is – the speed from which the engine can accelerate to idle without the help of the starter motor
Q15. Before opening the high-pressure fuel shut off valve during the engine start:
Correct answer is – the compressor must be turning at the correct rpm in the right direction
Q16. The air supply to operate an air starter usually comes from:
Correct answer is – the auxiliary power unit
Q17. The air supply for an air start system is:
Correct answer is – at a relatively low pressure, but high volume
Q18. The starter motor is disengaged from the engine start system:
Correct answer is – just above self-sustaining speed
Q19. In a twin spool engine self-sustaining speed is normally reached at:
Correct answer is – 30% N2
Q20. In a twin spool engine the typical idle speeds are:
Correct answer is – 60% N2, 25% N1
