Diploma Interview MCQ for DC Motor - Electronic Engineering


Application of DC Generator MCQ for Diploma in English, DC Machine for DC Motor. These questions cover charges in fields, DC Motor.


    Question 1: The simplest form of a motor controller?

  • magnetic switch
  • relay
  • toggle switch
  • drum switch
  • Answers: toggle switch

    Question 2: A DC series motor, as compared to shunt and compound motors, has the highest torque at the start because of its comparatively?

  • stronger series field
  • fewer series turns
  • lower armature resistance
  • large armature current
  • Answers: stronger series field

    Question 3: In Field's test for series motors one motor drives the other machine as?

  • cumulative compound generator
  • differential compound generator
  • series generator
  • separately excited generator
  • Answers: separately excited generator

    Question 4: A wide and very sensitive speed control is usually required in case of?

  • elevators
  • all of the above
  • steel rolling mills
  • colliery winders
  • Answers: all of the above

    Question 5: Speed control of a cumulatively compounded DC motor can be effected through change of?

  • field resistance
  • armature resistance
  • any of the above
  • armature voltage
  • Answers: any of the above

    Question 6: Which of the following, in a DC motor, can sustain the maximum temperature rise?

  • armature windings
  • Commutator
  • Slip rings
  • Field windings
  • Answers: Field windings

    Question 7: The rated speed of a given DC shunt motor is 900 RPM To run this machine at 1000 r.p.m., which of the following speed control scheme will be used?

  • Ward-Leonard control
  • Field resistance control
  • Armature current resistance control
  • None of the above
  • Answers: Field resistance control

    Question 8: The main disadvantage of Hopkinson's test for finding efficiency of the shunt DC motors is that it?

  • requires full-load power
  • needs one motor and one generator
  • requires two identical shunt machines
  • ignores any change in iron loss
  • Answers: requires two identical shunt machines

    Question 9: Which of the following methods gives the greatest braking torque?

  • Plugging
  • Regenerative braking
  • None of the above
  • Rheostatic braking
  • Answers: Plugging

    Question 10: Hopkinson's test on D.C. machines is conducted at?

  • no-load
  • part load
  • overload
  • full-load
  • Answers: full-load

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Total Questions Attempted: 0

Correct: 0 Wrong: 0



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