Question 1

Single-phase motors that use a centrifugal switch to disconnect the start windings cannot be used with variable voltage control. This limits the type of induction motors to capacitor-start capacitor-run and ____ motors.

Accepted Answer

A)   capacitor-stop
B)   resistor-stop
C)   resistor-start resistor-run
D)   shaded-poleE) None of the above
F) All of the above D

Question 2

A direct-current machine can be used as either a motor or generator.

Accepted Answer

A) True 
 B)False

Question 3

One type of alternating current motor that can use variable voltage for speed control is the ____________________ or AC series motor.

Accepted Answer

The answer of One type of alternating current motor that...

Question 4

When plugging, as a general rule, the reversing contactor is of a larger size than the forward contactor because of the increased plugging current.

Accepted Answer

A) True 
 B)False

Question 5

There are different methods of obtaining a variable AC voltage. One method is with the use of an autotransformer with a ____ tap.

Accepted Answer

A)   sliding
B)   fixed
C)   universal
D)   resistorE) None of the above
F) A) and B)

Question 6

When a generator produces electrical power, it produces ____ torque.

Accepted Answer

A)   dynamic
B)   counter
C)   inductive
D)   resistiveE) A) and D)
F) A) and C) B

Question 7

A three-phase two-pole motor contains ____ actual poles.

Accepted Answer

A)   two
B)   three
C)   four
D)   sixE) A) and B)
F) A) and C) D

Question 8

Many small single-phase motors change speed by varying the amount of voltage applied to the motor. This method changes the speed of the rotating magnetic field of the motor.

Accepted Answer

A) True 
 B)False

Question 9

Name three methods that can be used to provide braking for a motor.

Accepted Answer

There are several methods that...

Question 10

What is one advantage of consequent pole motors over some others types of variable speed alternating current motors?

Accepted Answer

Consequent pole motors have an...

Question 11

Consequent pole motors intended to operate with four speeds use ____ windings.

Accepted Answer

A)   two reconnectable
B)   three reconnectable
C)   two separate
D)   three separateE) B) and C)
F) B) and D)

Question 12

A two-speed motor will contain six T leads in the terminal connection box.

Accepted Answer

A) True 
 B)False

Question 13

Give an overview of universal motors.

Accepted Answer

Universal motors are commonly used in de...

Question 14

The most accurate method of plug stopping a motor is with a ____.

Accepted Answer

A)   stop switch
B)   rotating switch
C)   zero speed switch
D)   resistorE) None of the above
F) A) and D)

Exam 21: Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Single-phase motors that use a centrifugal switch to disconnect the start windings cannot be used with variable voltage control. This limits the type of induction motors to capacitor-start capacitor-run and ____ motors.

Correct Answer
verified
D

A direct-current machine can be used as either a motor or generator.

Correct Answer
verified

One type of alternating current motor that can use variable voltage for speed control is the ____________________ or AC series motor.

Correct Answer
verified

When plugging, as a general rule, the reversing contactor is of a larger size than the forward contactor because of the increased plugging current.

Correct Answer
verified

There are different methods of obtaining a variable AC voltage. One method is with the use of an autotransformer with a ____ tap.

Correct Answer
verified

When a generator produces electrical power, it produces ____ torque.

Correct Answer
verified
B

A three-phase two-pole motor contains ____ actual poles.

Correct Answer
verified
D

Many small single-phase motors change speed by varying the amount of voltage applied to the motor. This method changes the speed of the rotating magnetic field of the motor.

Correct Answer
verified

Name three methods that can be used to provide braking for a motor.

Correct Answer
verified
There are several methods that...
View Answer

What is one advantage of consequent pole motors over some others types of variable speed alternating current motors?

Correct Answer
verified
Consequent pole motors have an...
View Answer

Consequent pole motors intended to operate with four speeds use ____ windings.

Correct Answer
verified

A two-speed motor will contain six T leads in the terminal connection box.

Correct Answer
verified

Give an overview of universal motors.

Correct Answer
verified
Universal motors are commonly used in de...
View Answer

The most accurate method of plug stopping a motor is with a ____.

Correct Answer
verified

Exam 21: Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Single-phase motors that use a centrifugal switch to disconnect the start windings cannot be used with variable voltage control. This limits the type of induction motors to capacitor-start capacitor-run and ____ motors.

Correct AnswerverifiedD

A direct-current machine can be used as either a motor or generator.

Correct AnswerverifiedShow Answer

One type of alternating current motor that can use variable voltage for speed control is the ____________________ or AC series motor.

Correct AnswerverifiedShow Answer

When plugging, as a general rule, the reversing contactor is of a larger size than the forward contactor because of the increased plugging current.

Correct AnswerverifiedShow Answer

There are different methods of obtaining a variable AC voltage. One method is with the use of an autotransformer with a ____ tap.

Correct AnswerverifiedShow Answer

When a generator produces electrical power, it produces ____ torque.

Correct AnswerverifiedB

A three-phase two-pole motor contains ____ actual poles.

Correct AnswerverifiedD

Many small single-phase motors change speed by varying the amount of voltage applied to the motor. This method changes the speed of the rotating magnetic field of the motor.

Correct AnswerverifiedShow Answer

Name three methods that can be used to provide braking for a motor.

Correct AnswerverifiedThere are several methods that...View AnswerShow Answer

What is one advantage of consequent pole motors over some others types of variable speed alternating current motors?

Correct AnswerverifiedConsequent pole motors have an...View AnswerShow Answer

Consequent pole motors intended to operate with four speeds use ____ windings.

Correct AnswerverifiedShow Answer

A two-speed motor will contain six T leads in the terminal connection box.

Correct AnswerverifiedShow Answer

Give an overview of universal motors.

Correct AnswerverifiedUniversal motors are commonly used in de...View AnswerShow Answer

The most accurate method of plug stopping a motor is with a ____.

Correct AnswerverifiedShow Answer

Correct Answer
verified
D

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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B

Correct Answer
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D

Correct Answer
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Correct Answer
verified
There are several methods that...
View Answer

Correct Answer
verified
Consequent pole motors have an...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Universal motors are commonly used in de...
View Answer

Correct Answer
verified