Replace A Circuit Breaker

Question 1

What is meant by a trip-free circuit breaker?

Answer 1

A circuit breaker that cannot be closed while a fault exists, regardless of the position of the operating circuit

Question 2

What is meant by a slow-blow fuse?

Answer 2

A fuse that will allow more current than its rating to flow for a short period of time, but will open the circuit if more than its rated current continues to flow

Question 3

What is the function of a fuse or circuit breaker in an aircraft electrical circuit?

Answer 3

It protects the wiring from an excess of current.

Question 4

What are two principles upon which circuit breakers operate?

Answer 4

Magnetic circuit breakers open a circuit when the current creates a strong enough magnetic field

Question 5

What circuit in an aircraft electrical system is not required to have a circuit protective device?

Answer 5

The main circuit for starter motors, used during starting only

Question 6

Is an automatic-reset circuit breaker approved for aircraft electrical circuits?

Answer 6

No, a manual operation is needed to restore service after the circuit breaker has tripped