Compound - D.C Motor - MCQs with Answers

Compound - D.C Motor - MCQs with Answers

Q1. A long shunt compound motor and a short shunt compound motor can be

a. Cumulative type, differential type
b. Differential type, cumulative type
c. Both can be either cumulative or differential type
d. None of these

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Q2. Cumulative compound motor is capable of developing large amount of torque at low speeds just like series motor. Can cumulative compound motor be run on light load or no load?

a. Yes
b. No

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Q3. The speed current characteristics are shown in the given figure. Identify the different curves.



a. 1 – series, 2 – shunt, 3 – cumulative compound, 4 – differential compound
b. 1 – cumulative compound, 2 – differential compound, 3 – series, 4 – shunt
c. 1 – cumulative compound, 2 – differential compound, 3 – shunt, 4 – series
d. 1 – differential compound, 2 – shunt, 3 – cumulative compound 4 – series

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Q4. In a differential compound d.c. motor, with increase in load, speed

a. Increases
b. Decreases
c. Remains same
d. None of these

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Q5. In electric traction, which type of motor is generally used?

a. Shunt motor
b. Series motor
c. Cumulative compound motor
d. Differential compound motor

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Q6. Differential compound motors are mainly used in

a. Drilling machines
b. Elevators
c. Electric traction
d. Not suitable for any practical application

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Q7. Which motor is not suitable for the application of centrifugal pumps?

a. Shunt motor
b. Series motor
c. Cumulative compound motor
d. Differential compound motor

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Q8. Due to armature reaction magnetic neutral axis gets shifted by some angle. In case of motors the brushes are shifted

a. Forwards same as the direction of rotation
b. Backwards opposite to the direction of rotation
c. Either (a) or (b)
d. Do not get shifted

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