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Exam 19: Single-Phase Motors

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Question 21

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Motors that are not hermetically sealed use a(n) ______________________________ to disconnect the start winding from the circuit.

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Question 22

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A solid state starting relay is actually an electronic device known as a ____________________.

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Question 23

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The two basic types of multispeed single-phase motors are a specially wound capacitor-start capacitor-run motor and the ____________________ pole motor.

The capacitor-start induction-run motor produces a starting torque that is ____ that of the resistance-start induction-run motor.

Split-phase motors split the current through separate windings to simulate a ____________________-phase power system.

When connecting a dual voltage motor for high voltage, the leads are connected in ____________________.

A motor with 8 stator poles will have a rated speed of approximately ____ RPM.

A two-phase system is produced by having an alternator with two sets of coils wound ____________________ degrees apart.

Because motors that are hermetically sealed cannot use centrifugal switches to disconnect the start winding from the circuit, _________________________ are used to perform this function.

In a shaded-pole induction motor, the rotating magnetic field is created by a(n) ____________________ coil wound on one side of each pole piece.

Because it is intended for continuous use, the capacitor of a capacitor-start capacitor-run motor is generally a(n) ____ type.

When a universal motor has the leads of its compensating winding shorted together, it must be operated on ____.

To reverse the direction of a shaded-pole motor, you need to ____.

A capacitor-start induction-run motor has an electrolytic capacitor connected in series with the centrifugal switch and the _________________________.

Because the rotor of the Warren motor has two crossbars, its speed is rated at ____________________ RPM.

A thermistor is a device that exhibits a change of resistance with a change of ____.

When reversing the direction of rotation for an universal motor, the armature leads must be changed with respect to the ____________________ leads.

When the leads of the compensating winding of a universal motor are shorted together, the connection is known as ____ compensation.

When a single-phase motor has only one start winding, the leads are generally numbered ____________________ and ____________________.

When determining the direction of rotation of a motor, you should be looking at the ____ of the motor.