DC Motor for Electronic MCQ - Electronic Engineering
Advertisements
Most asked objective questions or MCQ on DC Motor for Electronic Engineering. DC Motor Series MCQ. DC shunt motor operating characteristics MCQ.
- power input + losses
- power output x efficiency
- back EMF x armature current
- power output x losses
Question 1: The mechanical power developed by a DC motor is equal to?
Answers: back EMF x armature current
- suitable for rapidly changing loads
- less expensive
- less wasteful
- unsuitable for changing loads
Question 2: The use of armature divertor in rheostatic method of speed control for a DC shunt motor makes the method ?
Answers: suitable for rapidly changing loads
- Field's test
- Ward-Leonard test
- Block rotor test
- Swinburne's test
Question 3: Which of the following methods is most effective in finding out the no load losses in a large DC shunt motor?
Answers: Swinburne's test
- Shunt motor
- Cumulative compound motor
- Series motor
- Differential compound motor
Question 4: Which DC motor is preferred for elevators?
Answers: Cumulative compound motor
- to decrease the field current
- to increase the field current
- not to effect the current passing through 'Hold on' coil even if any change in the field current takes place
- all of the above
Question 5: Four point starter in the DC motor is used?
Answers: not to effect the current passing through 'Hold on' coil even if any change in the field current takes place
- shunt motor
- any of the above
- compound motor
- series motor
Question 6: DC motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the?
Answers: series motor
- back EMF
- field flux
- armature current
- none of the above
Question 7: The speed of a DC motor, under constant load conditions, is affected by?
Answers: field flux
- zero torque braking
- smallest torque braking
- highest torque braking
- none of the above
Question 8: The plugging gives the?
Answers: highest torque braking
- in none of the above situations
- where load is constant
- where load changes frequently
- where constant operating speed is needed
Question 9: DC series motors are used?
Answers: in none of the above situations
- the power drawn in kW
- the power drawn in kVA
- the gross power
- the output power available at the shaft
Question 10: The power mentioned on the name plate of an electric motor indicates ?
Answers: the output power available at the shaft
Report Card
Total Questions Attempted: 0
Correct: 0 Wrong: 0
--
Advertisements
Related Articles
DC Motor MCQ
DC Motors Most Important Interview Questions and Answers. Viva Questions DC motors important question and...
DC Motor MCQ
Electrical Motors Interview Question And Answers · What are the causes of hot bearings? · What causes the...
DC Motor MCQ
DC Motor Questions · 1. What will happen if the DC shunt motor is linked across the AC supply? What is the...