Results
Q1. In an electrical circuit the reverse current cut-out relay will open:
Correct answer is – when battery voltage exceeds generator voltage
Q2. A generator cut-out is provided:
Correct answer is – to prevent discharge of the battery through the generator
Q3. A generator cut-out will open when:
Correct answer is – generator voltage falls below battery voltage
Q4. A generator cut-out is fitted to prevent:
Correct answer is – the battery discharging through the generator windings
Q5. In the event of the cut-out points sticking in the closed position, the most probable results, when the engine stopped would be:
Correct answer is – a burnt out generator
Q6. To prevent circulating currents when more than one generator is being connected to the same bus bar:
Correct answer is – differential cut-outs are used
Q7. A generator cut-out is fitted:
Correct answer is – in series with the generator output
Q8. On a 28 volt system with a 24 volt battery the cut-out contacts close at approximately:
Correct answer is – 26 volts
Q9. A component whose job is similar to a generator cut-out is:
Correct answer is – a reverse current relay
Q10. If the cut-out is open, the battery is feeding the loads which are:
Correct answer is – in parallel with the battery
Q11. In a two-engine aircraft with two generators, there would be:
Correct answer is – one ammeter for each generator and one voltmeter switchable to indicate either generator voltage or battery voltage
Q12. A generator converts mechanical energy to electrical by:
Correct answer is – electromagnetic induction
Q13. In an aircraft electrical system which incorporates a voltmeter, the voltmeter indicates:
Correct answer is – the pressure in the electrical system before and after the cut-out contacts close
Q14. If the generator warning light comes on in flight it indicates that:
Correct answer is – the generator is not feeding the battery bus bar
Q15. A generator failure is usually indicated by:
Correct answer is – the ammeter reading decreasing or showing a discharge and a red warning lamp lighting
Q16. A generator warning light will be illuminated:
Correct answer is – when the battery voltage exceeds that of the generator and the cut-out has opened
Q17. If a generator fails in flight:
Correct answer is – the ammeter reading will decrease
Q18. If one generator fails you should:
Correct answer is – switch off the failed generator, and cut down on the electrical services being used
Q19. A generator is brought ‘on line’ when it is:
Correct answer is – switched into the electrical circuit in parallel with the other generators
Q20. In a twin-engine aircraft, fitted with two generators, if one should fail:
Correct answer is – the failed generator must be isolated
Q21. A generator is brought ‘on line’ via the cut-out by an increase in:
Correct answer is – the generator voltage
Q22. Generator failure is indicated by:
Correct answer is – a decrease or discharge in ammeter readings and generator warning light on
Q23. In a twin-engine aircraft, with a generator fitted to both engines, the starboard generator fails. Then:
Correct answer is – both engines run normally
Q24. Loads on a bus bar are:
Correct answer is – in parallel so the current can be reduced
Q25. When the battery master switch is switched off in flight:
Correct answer is – the battery is isolated from the bus bar
Q26. A generator is taken ‘off’ line by:
Correct answer is – opening of the cut-out
Q27. If the ammeter reads plus 5 amp after engine shut down:
Correct answer is – the ammeter is defective
Q28. If the ammeter shows ‘no’ charge, yet the battery remains charged, you would look for:
Correct answer is – a defective ammeter
Q29. A field switch in the generator circuit is:
Correct answer is – to ‘shut off’ the generator field
Q30. During flight a malfunction of the generator cut-out would be indicated by:
Correct answer is – the ammeter
Q31. A short circuit in a “single pole” electrical circuit would be caused:
Correct answer is – when wiring between the source of supply and an item of equipment goes down to earth
Q32. In a “2 pole” electrical circuit, a short of the conductors would result in:
Correct answer is – the component not working
Q33. The indicating range of an ammeter can be increased by fitting:
Correct answer is – a shunt fitted in parallel with the instrument
Q34. An electrical system which uses the aircraft structure as a return path for current is known as:
Correct answer is – an earth return circuit
Q35. On a single pole circuit, if the positive conductor is shorted to the aircraft structure:
Correct answer is – the fuse will blow
Q36. In a double pole circuit:
Correct answer is – the current passes out through one wire and is returned through a second wire
Q37. In an earth return circuit if the conductor is open circuited:
Correct answer is – the load will not operate
Q38. A ‘hot bus’ is:
Correct answer is – the bus bar always connected to the battery
Q39. A dipole circuit is one where:
Correct answer is – two conductor wires are used
