Maintenance quiz

image: © Civil Aviation Safety Authority

Written by Ceri and Garth Bartlett, Bilyara Maintenance, Georges Hall, NSW

1 When changing a tyre on a light aircraft, it is normal practice to:

  1. align the tube stem opposite the red dot on the tyre
  2. align the red dot 45 degrees clockwise from the stem
  3. align the tube stem with the red dot on the tyre
  4. the relationship between the tube stem and the red dot is not significant

2 When a piston engine is running lean of peak:

  1. the engine will produce less power than when running rich of peak
  2. cylinder temperatures will be higher than when running rich of peak
  3. fuel consumption will be higher than when running rich of peak
  4. the engine may easily be damaged

3 In a simple piston-engine aircraft with an alternator and a 12 V battery, what should the charge voltage be closest to inflight, if the battery is fully charged?

  1. 12 V
  2. 14 V
  3. not above 13.1 V
  4. below 12 V

4 On most modern turbofan engines, when reverse is selected:

  1. only the core engine is reversed
  2. only the fan is reversed
  3. the core engine and the fan are reversed
  4. clam-shell doors open to redirect all thrust forward

5 The centre of gravity of a fixed-wing aircraft is always aft of the:

  1. fuel tank centre point
  2. second row of seats
  3. leading edge at the root of the wing
  4. engine

6 On climb in an aircraft with a normally aspirated engine, the mixture becomes:

  1. richer and the power increases
  2. richer and the power decreases
  3. leaner and the power increases
  4. leaner and the power decreases

7 A Dutch roll, which is a condition where the aircraft is unstable about the yaw axis, happens only:

  1. in high-speed aircraft
  2. in low-speed aircraft
  3. in aircraft with swept wings
  4. when flaps are extended

8 In a turbo-charged piston engine, ‘critical altitude’ is the altitude at which:

  1. throttle advancement does not result in an increase in manifold pressure
  2. throttle advancement increases the manifold pressure
  3. the engine runs rough due to the fuel control aneroid automatically leaning the mixture
  4. the engine runs rough due to a weak spark from the magnetos

9 When considering importing an aircraft from overseas, maintenance and repair data are accepted by CASA from:

  1. all ICAO countries
  2. USA and all European countries
  3. USA, Canada, South Africa, New Zealand and Britain
  4. USA, Canada, New Zealand, UK, France, Germany, Netherlands and EASA

10 Which of the following is not an effect of turbo-normalising a piston engine?

  1. Sea level power is achieved at cruise altitude
  2. A faster cruise speed is achieved
  3. Mixture can be leaner at cruise
  4. Power reduces during climb

11 Chines moulded perpendicular to a nose tyre are used to:

  1. deflect gravel from entering the engines
  2. deflect water from entering the engines
  3. aid keeping the nosewheel straight at high speed
  4. aid keeping the nosewheel straight during taxi

12 What is the main purpose of regular oil analyses in a piston-engine aircraft?

  1. to detect increasing trends of base metals being produced by the engine
  2. to identify broken internal components in the engine
  3. to identify when the engine needs overhaul
  4. to detect increasing trends of carbon in the oil

13 A helicopter lifts into the hover when the:

  1. rotor RPM reaches a certain speed
  2. pilot introduces the correct amount of anti-torque pedal
  3. engine governor allows take-off power to be reached
  4. pilot applies the collective control which increases the blade angle

14 In a light turboprop engine, the term ‘free turbine’ refers to when:

  1. the power section and the gas producer section are not connected mechanically.
  2. the propeller which is connected to the gas producer section, but not the power section.
  3. both power turbine and gas producer turbine which are connected to each other mechanically.
  4. the power section is started first and the resultant gases turn the gas producer turbine.

15 When the wheel hubs of large aircraft overheat, fusible plugs:

  1. melt and ensure pressure in the tyre remains constant
  2. melt and ensure the tyre does not deflate
  3. melt and release pressure in the tyre
  4. melt and prevent the brakes from overheating


  1. (c)
  2. (a)
  3. (b)
  4. (b)
  5. (c)
  6. (b)
  7. (c)
  8. (a)
  9. (d)
  10. (d)
  11. (b)
  12. (a)
  13. (d)
  14. (a)
  15. (c)


    • Ahhhhh, AIRFLOW reversal, not reverse the direction of rotation……. Hmmmm, thew word flow could help. :-)

  1. I agree q4 b is correct, the Question is “modern” turbofan engines, all big rpt aircraft I have worked on, cf6, trent 700, rb211, cfm 56, p & w jt9,s, only fan air is re-directed foreward at 135 deg. Q 4 d is correct in relation to older engines where clamshell doors direct all thrust, turbine and fan air foreward like the older dc8,s and b737- 200.

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