Results
Q1. Battery voltage is tested with:
Correct answer is – a voltmeter on rated load
Q2. Two 12 V 40 Ah batteries connected in series will produce:
Correct answer is – 24 V 40 Ah
Q3. Two 12 V 40 Ah batteries connected in parallel will produce:
Correct answer is – 12 V 80 Ah
Q4. A battery capacity test is carried out:
Correct answer is – 3 monthly
Q5. An aircraft has three batteries each of 12 volts with 40 Ah capacity connected in series. The resultant unit has:
Correct answer is – a voltage of 36 and a capacity of 40 Ah
Q6. An aircraft has a battery with a capacity of 40 Ah. Assuming that it will provide its normal capacity and is discharged at the 10 hour rate:
Correct answer is – it will pass 4 amps for 10 hrs
Q7. Battery capacity percentage efficiency must always be:
Correct answer is – 80% or more
Q8. The method of ascertaining the voltage of a standard aircraft lead acid battery is by checking:
Correct answer is – the voltage with rated load switched ON
Q9. A battery is checked for serviceability by:
Correct answer is – measuring the specific gravity of the electrolyte
Q10. In an AC circuit:
Correct answer is – a battery cannot be used because it is DC
Q11. The specific gravity of a fully charged lead acid cell is:
Correct answer is – 1.27
Q12. The nominal voltage of the lead acid cell is:
Correct answer is – 2.0 volts
Q13. A lead acid battery voltage should be checked:
Correct answer is – on load
Q14. In an aircraft having a battery of 24 volts nominal off load and fully charged the voltmeter would read:
Correct answer is – 26 volts
Q15. The system used to maintain aircraft batteries in a high state of charge is the:
Correct answer is – constant voltage system
Q16. If you connect two identical batteries in series it will:
Correct answer is – double the volts and leave the capacity the same
Q17. The nominal voltage of an alkaline cell is:
Correct answer is – 1.2 volts
Q18. The specific gravity of a fully charged alkaline cell is:
Correct answer is – 1.240 -1.30
Q19. The electrolyte used in the lead acid cell is diluted:
Correct answer is – sulphuric acid
Q20. The electrolyte used in an alkaline battery is diluted:
Correct answer is – potassium hydroxide solution
Q21. The number of lead acid cells required to make up a twelve volt battery is:
Correct answer is – 6
Q22. A voltmeter across the terminals of a battery with all services off will indicate:
Correct answer is – electromotive force
Q23. The voltage of a secondary cell is:
Correct answer is – determined by the active materials on the plates
Q24. The level of the electrolyte must be maintained:
Correct answer is – just above the top of the plates
Q25. To top up the electrolyte add:
Correct answer is – distilled water
Q26. Non-spill vents are used on aircraft batteries to:
Correct answer is – prevent spillage of electrolyte during violent manoeuvres
Q27. The capacity of a lead acid battery is:
Correct answer is – determined by the area of the plates
Q28. Acid spillage in an aircraft can be neutralized by using:
Correct answer is – bicarbonate of soda and water
Q29. When the battery master switch is switched off in flight:
Correct answer is – the battery is isolated from the bus bar
Q30. When the generator is on line the battery is:
Correct answer is – in parallel with the other loads
