Electrical Principles And Practical Electricity

Question 1

What is a circuit breaker?

Answer 1

It is an electromechanical device

Question 2

Are the contacts in a stop button normally open or normally closed?

Answer 2

Stop buttons in hardwired motor starters have normally closed contacts.

Question 3

What is the purpose of an electrical interlock?

Answer 3

To prevent electrical equipment from operating out of sequence

Question 4

When testing with an ohm meter, should the power to the circuits or components under load be on or off?

Answer 4

The power should be off