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DC Motors

DC Motors
A dc series motor is most suitable for

Punch presses
Pump
Lathes
Cranes

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DC Motors
Armature reaction in dc motor is increased

By interpoles
When the field current increases
When the armature current decreases
When the armature current increases

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DC Motors
In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to

100% of the previous value
10% of the previous value
25% of the previous value
50% of the previous value

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DC Motors
When two dc series motor are commected in parallel, the resultant speed is

Normal speed
Zero
Loss than the normal speed
More than the normal speed

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DC Motors
Compensating winding in a dc machine is placed

On armature
On yoke in the interpolar gap
None of the listed here
On yoke in the pole faces

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DC Motors
The variable resistor shunting the field of a dc series motor is called a

Armature divertor
Field divertor
Potential divider
Voltage regulator

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MORE MCQ ON DC Motors

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