Electrical Wiring And Protective Devices

Question 1

What is used to protect a wire bundle from chafing where it passes through a hole in a bulkhead or frame?

Answer 1

A grommet

Question 2

How are electrical wires protected where they pass through an area of high temperature?

Answer 2

Wires passing through these areas are insulated with high-temperature insulation and the wires are enclosed in some type of protective conduit

Question 3

What is the minimum separation allowed between a wire bundle and a fluid line that carries combustible fluid or oxygen?

Answer 3

Six inches

Question 4

Which aircraft electrical circuit does not normally contain a fuse or circuit breaker?

Answer 4

The starter motor circuit

Question 5

When should aircraft wiring be installed in a conduit?

Answer 5

When the wiring passes through an area in the aircraft where open wiring could likely be damaged, such as through a wheel well

Question 6

What is meant by a trip-free circuit breaker?

Answer 6

A circuit breaker that opens a circuit any time an excessive amount of current flows, regardless of the position of the circuit breaker operating handle

Question 7

Which way should the toggle of a switch that controls the propeller pitch move to place the propeller on low pitch?

Answer 7

Forward

Question 8

Why are protective covers placed over some switches in an aircraft electrical circuit?

Answer 8

To prevent the switch from being inadvertently actuated