D.C. Motors MCQ Questions & Answers | Electrical Engineering

A. 100% of the previous value

B. 50% of the previous value

C. 25% of the previous value

D. 10% of the previous value

A. Shunt motor

B. Series motor

C. Cumulative compound motor

D. Differentiate compound motor

A. The power drawn in kW

B. The power drawn in kVA

C. The gross power

D. The output power available at the shaft

A. Of lower H.P. should be selected

B. Of higher H.P. should be selected

C. Can be used for 50°C ambient temperature also

D. Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor

A. Full load

B. Rated r.p.m.

C. Rated voltage

D. All of the above

A. Slip rings

B. Commutator

C. Field winding

D. Armature winding

A. A stronger commutating field is needed at low speed than at high speed

B. A weaker commutating field is needed at low speed than at high speed

C. Same commutating field is needed at low speed than at high speed

D. None of the above is correct

A. Regenerative

B. Plugging

C. Dynamic braking

D. None of the above

A. Series motor

B. Shunt motor

C. Differentially compound motor

D. Cumulative compound motor

A. Torque will remain constant

B. Torque will change but power will remain constant

C. Torque and power both will change

D. Torque, power and speed, all will change