Exam 17: Types of Electric Motors

The starting device usually used on single phase, fractional horsepower motors requiring low starting torque is the ____.

In order to change the direction of rotation of a split-phase motor, the technician must change the direction of current flow through the start winding.

By what means does a two speed compressor motor accomplish the speed change?

The contact(s) in a potential type starting relay are normally closed.

A split-phase has a ____ winding and a ____ winding.

What is meant by the "phase angle" in an alternating current circuit?

The magnetic fields generated in the rotor and stator of a motor causes the rotor to be pushed around the shaft.

The shaded pole motor ____.

The ______________ is a winding that, when energized, will generate a magnetic field as there will be current flowing through it.

When a Capacitor Start, Capacitor Run (CSCR) motor initially starts, what is the total capacitance acting on the motor? (Assume the run capacitor is 5 microfarads and the start capacitor is 20 microfarads, if present.)

A motor's speed is determined by ____.

Three phase motors have ____.

The contact(s) in a current type starting relay are normally closed.

The start windings have ____.

On a potential relay, the coil is connected between terminals 2 and ____________________.

A permanent split capacitor (PSC) motor that is running and up to speed will have the start winding ____.