SINGLE PHASE MOTORS QUIZ

The washing machine generally employs ______ motor.

Hysteresis

Single phase series motor

Resistance split phase

Shaded pole

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YOUR ANSWER : ?

Which of the following application make use of a universal motor?

Floor polishing machine

Portable tools

Oil expeller

Lathe machines

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Which motor will make least noise?

Shaded pole motor

Capacitor motor

Hysteresis motor

Universal motor

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For the same rating, a dc series motor costs ______single phase series motor.

Less than

More than

About the same

None of the listed here

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Electrical faults in a motor occur must commonly in its

Control equipment

Motor winding

Brushes

Commutator

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The resistance split phase induction motors are the most popular single phase motors because of ______

Their high starting torque

Their low cost

None of the listed here

The long starting period

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Which of the following applications would need the smallest size of motor?

Electric clock

Sewing machine

Table fan

Domestic mixi

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Which of the following motor can be used for unity power factor?

Shaded pole motor

Capacitor run motor

Scharge motor

Hysteresis motor

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In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will

Run as induction motor

Fall out of synchronism and come to stand still

Become unstable

Draw excessive armature current and may burn out

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The full load efficiency of a shaded pole motor is about _______

60 to 70%

70 to 80%

5 to 10%

30 to 35%

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YOUR ANSWER : ?

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