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DC Motors

DC Motors
A direct on line starter is used for starting motors

Upto 15 HP
Upto 10 HP
Upto 20 HP
Upto 5 HP

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DC Motors
In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be

Almost negligible
Rated full-load current
More than full-load current
Less than full-load current

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DC Motors
Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control

Three point starter is used
All above can be used
Drum type controller is used
Four point starter is used

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DC Motors
By putting controller resistance in series with the armature of a dc motor, we can obtain speeds

Above the normal speed only
Below the normal speed only
Above as well as below the normal speed
None of the listed here

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DC Motors
Three point starter can be used for

Series motor only
Compound motor only
Shunt motor only
Both shunt and compound motor

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DC Motors
No load speed of which of the following motor will be highest?

Series motor
Cummulative compounded motor
Differentially compounded motor
Shunt motor

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MORE MCQ ON DC Motors

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