DC Motors - Interview Questions | Exam2Win

Take a timed mock test specifically for DC Motors.

1. In a D.C. shunt motor, speed is

A. independent of armature current

B. directly proportional to the armature current

C. proportional to the square of the current

D. inversely proportional to the armature current

Explanation:

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

A. Ward Leonard control

B. rheostatic control

C. any of the above method

D. none of the above method

Explanation:

3. In variable speed motor

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

Explanation:

4. In the D.C. motor the iron losses occur in

A. the field

B. the armature

C. the brushes

D. the commutator

Explanation:

5. One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven

A. runs as a generator

B. does not run as a generator

C. also runs as a motor comes to stop after sometime

D. also runs as a motor comes to stop after sometime

Explanation: