1000+ DC Motor MCQ Questions and Answers Pdf - 1

Question: 1

Starters are used with D.C. motors because

(A) to restrict armature current as there is no back e.m.f. while starting

(B) back e.m.f. of these motors is zero

(C) these motors are not self starting

(D) these motors have high starting torque

Question: 2

In a D.C. shunt motor, speed is

(A) inversely proportional to the armature current

(B) proportional to the square of the current

(C) directly proportional to the armature current

(D) independent of armature current

Question: 3

Which of the following motor is preferred for operation in highly explosive atmosphere?

(A) air motor

(B) battery operated motor

(C) shunt motor

(D) series motor

Question: 4

Fly wheel is used D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be

(A) differentially compounded

(B) cumulative compounded

(C) under compounded

(D) level compounded

Question: 5

Which of the following motor has the poorest speed regulation?

(A) cumulative compound motor

(B) differential compound motor

(C) series motor

(D) shunt motor