DC Motors - Interview Questions | Exam2Win

Take a timed mock test specifically for DC Motors.

11. Which of the following application requires high starting torque ?

A. Lathe machine

B. Centrifugal pump

C. Locomotive

D. Air blower

Explanation: ANSWER : : Locomotive Explanation :

12. The type of D.C. motor used for shears and punches is

A. shunt motor

B. series motor

C. differential compoutid D.C. motor

D. cumulative compound D.C. motor

Explanation: ANSWER : : cumulative compound D.C. motor Explanation :

13. For starting a D.C. motor a starter is required because

A. it limits the speed of the motor

B. it limits the starting current to a safe value

C. it starts the motor

D. none of the above

Explanation: ANSWER : : it limits the starting current to a safe value Explanation :

14. Which D.C. motor is preferred for elevators ?

A. Shunt motor

B. Series motor

C. Differential compound motor

D. Cumulative compound motor

Explanation: ANSWER : : Cumulative compound motor Explanation :

15. What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?

A. The motor will stop

B. The motor will continue to run

C. The armature may burn

D. The motor will run noisy

Explanation: ANSWER : : The armature may burn Explanation :