Exam 17: Types of Electric Motors

The resistances of the windings in a three phase motor are all equal.

The difference between synchronous speed and full load speed is called ____________________.

Once the start winding and the start capacitor have been removed for the circuit, the motor will continue to operate with only the run winding energized.

The centrifugal switch mounted on the shaft of a split-phase motor has a normally closed contact.

A motor that has copper bars in the rotor is classified as a(n) ____________________ type.

When a Capacitor Start Induction Run (CSIR) motor is running and up to speed, 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.)

The windings of the relay coil in a current relay has very low resistance. Why?

The heavier the load on an operating motor, the greater the amount of slip.

When a general duty split-phase motor reaches approximately 75% of its operating speed, the start winding is de-energized by a ____.

A split-phase motor that has a current relay and a start capacitor is called a(n) ____ motor.

A current magnetic relay opens and closes its contacts based on the ____.

The positive temperature coefficient resistor start device is a type of ____.

When not air cooled, the heat generated by the motor in a hermetic motor-compressor assembly is removed by what?

The rotating portion of an electric motor is called the ____________________.

Capacitors wired in series with the starting winding provide a(n) ____.

The microfarad rating of the run capacitor is much lower than that of the start capacitor for any given motor application.

A permanent split-capacitor motor has a ____.

A Capacitor Start Capacitor Run (CSCR) motor that is wired with a potential relay will have the start winding energized when the relay's contacts open.

The coil of a potential relay has ____________________ resistance.

Start windings are placed ____ with the run windings.