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DC Motors

DC Motors
A dc series motor is most suitable for

Cranes
Lathes
Pump
Punch presses

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DC Motors
Motor starter are essential for

Avoiding excessive starting current
Preventing fuse blowing
Accelerating the motor
Starting the motor

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DC Motors
If a dc motor is comnected across the AC supply it will

Burn due to heat produced in the field winding by eddy currents
Not run
Run at lower speed
Run at normal speed

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DC Motors
Small dc motors up to 5 HP usually have

2 poles
8 poles
6 poles
4 poles

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DC Motors
The most suitable motor for elevators is the ____ motor.

Shunt
Series
Cummulative compounded
Differentially compuonded

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DC Motors
What will happen if the back emf of a dc motor vanishes suddenly?

The motor will continue to run
The armature may burn
The motor will stop
The motor will run noisy

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MORE MCQ ON DC Motors

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