AMT Aircraft Electrical Systems 2

Question 1

What is the purpose of a bus bar in an aircraft electrical system?

Accepted Answer

To distribute electrical power to multiple circuits from a common point

Answer

To convert AC to DC power

Answer

To regulate voltage output from the generator

Answer

To store electrical energy for emergency use

Question 2

A constant-speed drive (CSD) on an aircraft generator is used to:

Accepted Answer

Maintain a constant generator RPM regardless of engine speed

Answer

Vary the output voltage based on load

Answer

Regulate current output during peak demand

Answer

Convert mechanical energy to hydraulic pressure

Question 3

Which type of wire insulation is most resistant to high temperatures in an aircraft engine compartment?

Accepted Answer

PTFE (polytetrafluoroethylene)

Answer

PVC (polyvinyl chloride)

Answer

Nylon

Answer

Rubber

Question 4

What does the term 'electrical bonding' mean in aircraft maintenance?

Accepted Answer

Ensuring all metallic parts are at the same electrical potential

Answer

Connecting multiple batteries in series

Answer

Insulating wiring from the airframe structure

Answer

Applying dielectric grease to terminal connections

Question 5

In a 28-volt DC aircraft system, what minimum voltage at the battery indicates a fully charged state?

Accepted Answer

28.0 volts

Answer

24.0 volts

Answer

25.5 volts

Answer

26.5 volts

Question 6

A circuit breaker that 'trips' repeatedly under normal load conditions most likely indicates:

Accepted Answer

A short circuit or overload in the downstream circuit

Answer

The breaker is the wrong amperage rating

Answer

The bus bar voltage is too high

Answer

The generator is producing excessive current

Question 7

Which instrument is used to measure insulation resistance of aircraft wiring?

Accepted Answer

Megohmmeter (megger)

Answer

Ammeter

Answer

Voltmeter

Answer

Wattmeter