Author Question: A major difference between three-phase motors and single-phase motors is that: A) Three-phase ... (Read 137 times)

jon_i · **on:** Jul 24, 2018

A major difference between three-phase motors and single-phase motors is that:

A) Three-phase motors do not need any type of starting components.
B) Three-phase motors use three times as much current.
C) Three-phase motors have a laminated iron rotor.
D) Three-phase motors use three sets of starting components.

Question 2

If a voltmeter shows a reading of 240 V across the thermal limit to a strip heater on an electric furnace, it indicates:

A) The limit is close, completing the circuit to the heater.
B) The limit is open, completing the circuit to the heater.
C) The limit is closed, breaking the circuit to the heater.
D) The limit is open, breaking the circuit to the heater.