Results
Q1. Spare fuses are carried:
Correct answer is – by law with a stated minimum number required
Q2. When selecting a fuse for a circuit the governing factor is:
Correct answer is – the power requirement of the circuit
Q3. # Differential cut-outs close when a differential voltage exists between the:
Correct answer is – generator bus and battery bus bar
Q4. Circulating current is the term used to describe:
Correct answer is –
Q5. A megohm is:
Correct answer is – 1 000 000 ohms
Q6. # Load shedding is:
Correct answer is – overall reduction of electrical load on the system
Q7. When a generator is on line and its associated ammeter reads 10 amps, this is an indication of:
Correct answer is – generator load
Q8. The formula for calculating power is:
Correct answer is – frac{V^{2}}{R} or I^{2}times R Ror Itimes V
Q9. Assuming a 5 amp circuit has failed during flight and investigation has shown that the fuse is open circuit, the action to be taken is to:
Correct answer is – switch off, replace the failed fuse with one of the correct rating once only
Q10. If the voltage in a circuit is doubled, the current will:
Correct answer is – double
Q11. A simple electrical circuit has a current flow of 4 amperes and its resistance is 5 ohms. How much power (watts) is used?
Correct answer is – 80 watts
Q12. Check a lead acid battery voltage:
Correct answer is – on load with a voltmeter
Q13. Connecting two batteries in series will:
Correct answer is – increase the voltage, the capacity will remain the same
Q14. An aircraft has a battery with a capacity of 60 Ah. Assuming that it will provide its nominal capacity and is discharged at the 10 hour rate:
Correct answer is – it will pass 6 amperes for 10 hours
Q15. A NiCad battery shows a high temperature after engine start, this could be an indication of:
Correct answer is – thermal runaway
Q16. When generators are connected in parallel their output voltage must be:
Correct answer is – the same
Q17. In a direct current generating system the voltage regulator controls the system voltage within prescribed limits:
Correct answer is – regardless of varying engine RPM and electrical load by inserting a variable resistance in the generator field winding
Q18. A generator cut-out is fitted:
Correct answer is – to prevent the battery feeding back into the generator when its voltage is above the generator voltage
Q19. A generator cut-out contacts will close:
Correct answer is – with an increase in generator voltage
Q20. Failure of an aircraft generator is indicated by:
Correct answer is – a red warning light lighting and the ammeter showing zero or discharge
Q21. On a twin-engine aircraft with a generator fitted to each engine, if the starboard generator fails,:
Correct answer is – both engines will run normally
Q22. On an earth return aircraft wiring circuit:
Correct answer is – the negative pole is connected to the aircraft structure
Q23. In a dipole aircraft wiring circuit if the conductors are bridged:
Correct answer is – the fuse or circuit breaker in that circuit will blow
Q24. A circuit breaker that has tripped due to overload:
Correct answer is – cannot be reset unless the circuit has returned to normal
Q25. When changing a blown fuse:
Correct answer is – it is changed with one of the correct rating
Q26. As the speed of an electric motor increases the back EMF will:
Correct answer is – increase
Q27. The output of a shunt wound generator:
Correct answer is – will remain constant as load is applied
Q28. Load shedding is:
Correct answer is – overall reductions of the loads on the system
Q29. An inertia switch on an aircraft will operate:
Correct answer is – during an emergency or crash landing
Q30. The purpose of electrical bonding on aircraft is:
Correct answer is – to provide a low resistance path for earth return circuits and safely dissipate local static charges and lightning strikes
Q31. Electrical components of aircraft systems are screened to:
Correct answer is – prevent them interfering with the function of radio equipment
