DC Motor Important MCQ - Electronic Engineering


The field coils of DC Motor with answers. all the important MCQ questions of DC motor in detail and also provide some important points to remember for interviews.


    Question 1: In DC shunt motors as load is Reduced?

  • the speed will increase abruptly
  • the speed will increase in proportion to reduction in load
  • the speed will remain almost constant
  • the speed will reduce
  • Answers: the speed will remain almost constant

    Question 2: Which DC motor will be preferred for constant speed line shafting?

  • Shunt motor
  • Cumulative compound motor
  • Differentially compound motor
  • Series motor
  • Answers: Shunt motor

    Question 3: The ratio of starting torque to full load torque is least in case of?

  • series motor
  • none of the above
  • compound motors
  • shunt motors
  • Answers: shunt motors

    Question 4: In a DC series motor if the armature current is reduced by 50%, the torque of the motor will be equal to?

  • 100% of the previous value
  • 25% of the previous value
  • 50% of the previous value
  • 10% of the previous value
  • Answers: 25% of the previous value

    Question 5: In case of conductively compensated DC series motors, the compensating winding is provided?

  • as separately wound unit
  • in parallel with armature winding
  • in series with armature winding
  • in parallel with field winding
  • Answers: in series with armature winding

    Question 6: As compared to an induction motor, the air gap in a DC motor is?

  • less than 50%
  • between 50% and 90%
  • same
  • more
  • Answers: more

    Question 7: Which of the following motor has the poorest speed regulation?

  • Shunt motor
  • Series motor
  • Differential compound motor
  • Cumulative compound motor
  • Answers: Series motor

    Question 8: For a DC shunt motor if the excitation is changed?

  • torque will remain constant
  • torque, power and speed, all will change
  • torque will change but power will remain constant
  • torque and power both will change
  • Answers: torque will change but power will remain constant

    Question 9: Which of the following motors have almost constant speed over their full load range?

  • Both (b) and (c)
  • AC series motors
  • DC shunt motors
  • Low resistance squirrel cage motors
  • Answers: Both (b) and (c)

    Question 10: Which of the following motor is used in the locomotives motor drives?

  • Induction motor
  • Synchronous motor
  • AC series motor
  • DC series motor
  • Answers: DC series motor

Report Card

Total Questions Attempted: 0

Correct: 0 Wrong: 0



Related Articles

DC Motor MCQ

DC Motors Most Important Interview Questions and Answers. Viva Questions DC motors important question and...

read more

DC Motor MCQ

Electrical Motors Interview Question And Answers · What are the causes of hot bearings? · What causes the...

read more

DC Motor MCQ

DC Motor Questions · 1. What will happen if the DC shunt motor is linked across the AC supply? What is the...

read more