AC Machines

AC Machines

Professional Development

28 Qs

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Assessment

Quiz

Professional Development

Professional Development

Practice Problem

Hard

Created by

Matt G

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28 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which three of the following are types of three-phase rotor?

Axial cage

Dual cage

Extended rotor

Squirrel cage

Wound rotor

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A three-phase squirrel cage induction motor will produce maximum torque when:

The shape of the rotor is maximised for the greatest torque

Motor resistance is at a maximum

Rotor resistance equals rotor reactance

Rotor reactance is at a maximum

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Complete this sentence - As the load on an induction motor increases:

both the efficiency and the power factor increase.

efficiency increases but power factor decreases.

efficiency decreases but power factor increases.

both the efficiency and the power factor decrease.

4.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which two of the following characteristics of a split-phase motor can be used to identify it?

High starting torque

Two dissimilar windings

Low starting current

Three-phase power supply

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which motor has a starting winding with high resistance and low reactance?

Washing machine motor

Ceiling fan motor

Air compressor motor

Refrigerator motor

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which motor is known for the best starting and running torque?

Capacitor start/capacitor run

Permanently split capacitor motor

Shaded Pole

Universal motor

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which single phase motor is commonly used to drive an industrial floor polisher?

Capacitor start/capacitor run

Permanently split capacitor motor

Shaded Pole

Universal motor

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