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Exam 34: Single-Phase Motors

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Question 1

Multiple Choice

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A single-phase synchronous motor is sometimes referred to as a(n) _____ motor.

A) impedance
B) repulsion
C) hysteresis
D) inductive

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C

Question 2

Multiple Choice

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In single-phase motors such as the resistance start induction-run motor, the start winding is disconnected by the _____.

A) centrifugal switch
B) disconnect switch
C) operator
D) overload switch

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Question 3

Multiple Choice

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The _____ motor can operate on either AC or DC voltage.

Conductive compensation is accomplished by connecting the compensating winding in _____ with the armature.

The Holtz motor operates at _____ RPM.

In the shaded-pole induction motor, the shading coil acts like a transformer with a(n) _____ secondary winding.

The Warren motor operates at _____ RPM.

The _____ winding is made of many turns of small wire and is located at the top of the stator core of a split-phase motor.

A two-phase power system has two voltages that are _____ out of phase.

What is  a special type of motor designed to operate with the rotor stalled without damage to the motor?

In a universal motor, setting the brushes to the neutral plane can be done by connecting voltage to the armature, a voltmeter to the series field, and adjusting the brush position for a _____ reading on the voltmeter.

Split-phase motors operate on the principle of a _____ magnetic field.

In a universal motor, inductive compensation can be used when the motor is connected to _____.

The output shaft of a stepping motor _____.

In a motor that has a rotating magnetic field, the speed of that magnetic field is referred to as the _____.

The universal motor has a wound armature and brushes like an AC motor, as well as an added component, the _____.

In the shaded-pole induction motor, the direction of rotation of the magnetic field is determined by the _____.

A(n) _____ motor operates on the principle that like magnetic poles repel.

The consequent-pole motor is used where _____ running torque must be maintained at different speeds.

The _____ winding is made of a few turns of large wire and is located at the bottom of the stator core  of a split-phase motor.