SINGLE PHASE MOTORS QUIZ

Which motor will make least noise?

Shaded pole motor

Hysteresis motor

Universal motor

Capacitor motor

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Which of the following statements regarding repulsion-start induction motor is incorrect ?

It is not easily reversed

It requires more maintenance of commutator and other mechanical devices

In fractional horse power motors, it has replaced the capacitor motors

It makes quite a bit of noise on starting

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

Less than

None of the listed here

More than

About the same

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The capacitor used in capacitor start motor is always a _______ capacitor.

Mica

Ceramic

Paper

Electrolyte

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A repulsion motor is equipped with

commutator

slip rings

both (A) and (B)

None of these

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The speed/load characteristics of a universal motor is same as that of

DC series motor

DC shunt motor

None of the listed here

AC motor

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The wattage rating for a ceiling fan motor will be in the range

50 to 150 W

250 to 500 W

10 to 20 W

200 to 250 W

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

Shaded pole motor

Scharge motor

Capacitor run motor

Hysteresis motor

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If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then

motor will not come up to speed

electrolytic capacitor will, in all probability, suffer break down

current drawn by the motor will be excessively high

motor will not carry the load

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In a capacitor start, capacitor-run motor, _______ winding is cut out after starting.

None of the listed here

Main

Neither starting nor main

Starting

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