Author Question: A normally closed set of relay contacts will close when: A) Power is not applied to the contacts. ... (Read 353 times)

Bob-Dole · **on:** Jul 24, 2018

A normally closed set of relay contacts will close when:

A) Power is not applied to the contacts. B) Power is not applied to the relay coil.
C) Power is applied to the contacts. D) Power is applied to the relay coil.

Question 2

When a line-duty overload protecting a heater detects an overload, it:

A) Breaks the heater. B) Cuts power to a relay which powers the heater.
C) Breaks the power line to the house. D) Breaks the line voltage to the heater.