Electrical Engineering Questions And Answers :: Dc Motors: part1

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Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part1 : 6 to 10

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

6.The speed of a D.C. shunt motor more than its full-load speed can be obtained by

decreasing the field current
increasing the field current
decreasing the armature current
increasing the armature current

7.A direct on line starter is used: for starting motors

iip to 5 H.P.
up to 10 H.P.
up to 15 H.P.
up to 20 H.P.

8.By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

Frame
Shaft
Commutator
Stator

9.These days D.C. motors are widely used in

pumping sets
air compressors
electric traction
machine shops

10.To get the speed of D.C, motor below the normal without wastage of electrical energy is used.

Ward Leonard control
rheostatic control
any of the above method
none of the above method

More Dc Motors QUESTIONS AND ANSWERS available in next pages

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