AET AET Aircraft Power Systems 2

Question 1

Which type of aircraft battery is most commonly used in modern general aviation aircraft due to its maintenance advantages?

Accepted Answer

Sealed absorbed glass mat (AGM) lead-acid

Answer

Nickel-cadmium (NiCd)

Answer

Lead-acid (flooded cell)

Answer

Lithium-ion

Question 2

What is the primary advantage of nickel-cadmium (NiCd) batteries used in turbine-powered aircraft over lead-acid batteries?

Accepted Answer

More stable voltage during discharge and better high-current performance

Answer

Lower cost

Answer

Higher energy density per pound

Answer

Easier disposal requirements

Question 3

An aircraft inverter converts aircraft DC power into AC power primarily to supply which type of equipment?

Accepted Answer

AC-powered instruments and avionics that require 115V 400 Hz AC

Answer

DC motors and actuators

Answer

Engine ignition systems

Answer

Landing lights

Question 4

What does the term 'load shedding' mean in the context of aircraft electrical power management?

Accepted Answer

Disconnecting non-essential electrical loads to reduce demand on a degraded power source

Answer

Increasing generator output during peak demand

Answer

Balancing load between two generators

Answer

Testing circuit breakers sequentially

Question 5

A ground power unit (GPU) is connected to an aircraft for maintenance. What precaution must be taken before connecting the GPU to avoid damage to avionics?

Accepted Answer

Verify GPU voltage and polarity match aircraft requirements before connecting

Answer

Ensure all avionics master switches are ON

Answer

Run the aircraft engine simultaneously

Answer

Set all transponders to STANDBY mode only

Question 6

In a twin-engine aircraft with two generators, what component automatically connects both generators to share the electrical load?

Accepted Answer

Bus tie relay (BTR) or bus tie breaker

Answer

Voltage regulator

Answer

Current transformer

Answer

Load controller unit