1000+ DC Motor Quiz Questions and Answers Pdf - 1

Question: 1

In a D.C. motor constant torque is produced due to

(A) rotor laminations

(B) commutator

(C) pole shoes

(D) end plates

Question: 2

Which loss in a D.C. generator does not vary with load as well as flux density?

(A) windage loss

(B) hysteresis loss

(C) eddy current loss

(D) copper loss

Question: 3

The speed of a D.C. shunt motor can be increased by

(A) reducing the resistance in the armature circuit

(B) reducing the resistance in the field circuit

(C) increasing the resistance in armature circuit

(D) increasing the resistance in field circuit

Question: 4

Which of the following motors one will choose to drive the rotary compressor?

(A) Synchronous motor

(B) Universal motor

(C) D.C. series motor

(D) D.C. shunt motor

Question: 5

The speed of a D.C. series motor is

(A) inversely proportional to the armature current

(B) proportional to field current

(C) proportional to the square of the armature current

(D) proportional to the armature current