DC Motor Important MCQ - Electronic Engineering
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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.
- 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
Question 1: In DC shunt motors as load is Reduced?
Answers: the speed will remain almost constant
- Shunt motor
- Cumulative compound motor
- Differentially compound motor
- Series motor
Question 2: Which DC motor will be preferred for constant speed line shafting?
Answers: Shunt motor
- series motor
- none of the above
- compound motors
- shunt motors
Question 3: The ratio of starting torque to full load torque is least in case of?
Answers: shunt motors
- 100% of the previous value
- 25% of the previous value
- 50% of the previous value
- 10% of the previous value
Question 4: In a DC series motor if the armature current is reduced by 50%, the torque of the motor will be equal to?
Answers: 25% of the previous value
- as separately wound unit
- in parallel with armature winding
- in series with armature winding
- in parallel with field winding
Question 5: In case of conductively compensated DC series motors, the compensating winding is provided?
Answers: in series with armature winding
- less than 50%
- between 50% and 90%
- same
- more
Question 6: As compared to an induction motor, the air gap in a DC motor is?
Answers: more
- Shunt motor
- Series motor
- Differential compound motor
- Cumulative compound motor
Question 7: Which of the following motor has the poorest speed regulation?
Answers: Series motor
- 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
Question 8: For a DC shunt motor if the excitation is changed?
Answers: torque will change but power will remain constant
- Both (b) and (c)
- AC series motors
- DC shunt motors
- Low resistance squirrel cage motors
Question 9: Which of the following motors have almost constant speed over their full load range?
Answers: Both (b) and (c)
- Induction motor
- Synchronous motor
- AC series motor
- DC series motor
Question 10: Which of the following motor is used in the locomotives motor drives?
Answers: DC series motor
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Total Questions Attempted: 0
Correct: 0 Wrong: 0
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