Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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.)

Accepted Answer

A)   4 microfarads
B)   5 microfarads
C)   20 microfarads
D)   25 microfarads

Question 3

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.

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

A)   longer starting time
B)   greater starting torque
C)   aid in starting three phase motors
D)   more efficient operation at full load speed

Question 5

A permanent split-capacitor motor has a ____.

Accepted Answer

A)   start and run capacitor
B)   start capacitor only
C)   run capacitor only
D)   split phase capacitor

Question 6

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.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

The answer of The rotating portion of an electric motor...

Question 8

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

Accepted Answer

The answer of A motor that has copper bars in...

Question 9

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

Accepted Answer

A)   circuit board
B)   capacitor
C)   centrifugal switch
D)   dual voltage switch

Question 10

Start windings are placed ____ with the run windings.

Accepted Answer

A)   180 degrees out of phase
B)   in phase
C)   slightly out of phase
D)   in series

Question 11

The coil of a potential relay has ____________________ resistance.

Accepted Answer

The answer of The coil of a potential relay has...

Question 12

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

Accepted Answer

It would drop too mu...

Question 13

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

Accepted Answer

It is remo...

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False  True

Question 16

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

Accepted Answer

slip

Question 17

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

Accepted Answer

A)   current in the start winding
B)   voltage across the start winding
C)   voltage across the run winding
D)   current in the run winding

Question 18

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

Accepted Answer

A)   capacitor
B)   variable resistor
C)   switching device
D)   diode

Question 19

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

Accepted Answer

A)   Capacitor Start, Capacitor Run (CSCR) 
B)   Capacitor Start, Induction Run (CSIR) 
C)   Induction Start, Induction Run (ISIR) 
D)   Permanent Split Capacitor (PS
C)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 17: Types of Electric Motors

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

Correct AnswerverifiedShow Answer

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.)

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

A permanent split-capacitor motor has a ____.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Start windings are placed ____ with the run windings.

Correct AnswerverifiedShow Answer

The coil of a potential relay has ____________________ resistance.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedIt would drop too mu...View AnswerShow Answer

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

Correct AnswerverifiedIt is remo...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedTrue

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

Correct Answerverifiedslip

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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True

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It would drop too mu...
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It is remo...
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True

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slip

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