BAK - Aircraft Support Systems

Question 1

What is the normal power source for the aircraft’s electrical systems?

Answer 1

Engine-driven alternator

Question 2

If the aircraft’s alternator was to fail, what power source would drive the electrical components for a limited period of time?

Answer 2

Battery

Question 3

What is the purpose of the electrical system’s main bus bar?

Answer 3

To distribute power to other bus bars and the electrical circuits

Question 4

By what means is the aircraft’s battery recharged once the engine is running?

Answer 4

Engine driven-alternator

Question 5

The electrical system in your aircraft incorporates a centre-zero ammeter. What does a continuous battery discharge on this ammeter indicate?

Answer 5

Alternator failure

Question 6

Having confirmed that the zero-reading on the aircraft’s left-zero ammeter is in fact zero and not just a low reading, is the issue likely to be an alternator or a voltmeter failure?

Answer 6

Alternator failure

Question 7

In flight, is an alternator working properly and supplying power to the battery if the needle on the centre-zero ammeter is left or right of the zero?

Answer 7

Right

Question 8

Will an under-voltage indication on the voltmeter mean the battery may eventually boil of go flat?

Answer 8

Go flat

Question 9

Will an over-voltage indication on the voltmeter mean the battery may eventually overheat or go flat?

Answer 9

Overheat

Question 10

What two components protect electrical circuits from overload?

Answer 10

Fuses and circuit breakers

Question 11

How can a pilot build up braking pressure during the landing run if the hydraulic brakes feel soft, spongy and or have excessive travel?

Answer 11

By gently pumping the pedals or handle

Question 12

In flight, a prolonged higher than normal voltage may indicate an internal fault with the voltmeter and what other component?

Answer 12

Battery