Diploma Interview MCQ for DC Motor - Electronic Engineering
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Application of DC Generator MCQ for Diploma in English, DC Machine for DC Motor. These questions cover charges in fields, DC Motor.
- magnetic switch
- relay
- toggle switch
- drum switch
Question 1: The simplest form of a motor controller?
Answers: toggle switch
- stronger series field
- fewer series turns
- lower armature resistance
- large armature current
Question 2: A DC series motor, as compared to shunt and compound motors, has the highest torque at the start because of its comparatively?
Answers: stronger series field
- cumulative compound generator
- differential compound generator
- series generator
- separately excited generator
Question 3: In Field's test for series motors one motor drives the other machine as?
Answers: separately excited generator
- elevators
- all of the above
- steel rolling mills
- colliery winders
Question 4: A wide and very sensitive speed control is usually required in case of?
Answers: all of the above
- field resistance
- armature resistance
- any of the above
- armature voltage
Question 5: Speed control of a cumulatively compounded DC motor can be effected through change of?
Answers: any of the above
- armature windings
- Commutator
- Slip rings
- Field windings
Question 6: Which of the following, in a DC motor, can sustain the maximum temperature rise?
Answers: Field windings
- Ward-Leonard control
- Field resistance control
- Armature current resistance control
- None of the above
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?
Answers: Field resistance control
- requires full-load power
- needs one motor and one generator
- requires two identical shunt machines
- ignores any change in iron loss
Question 8: The main disadvantage of Hopkinson's test for finding efficiency of the shunt DC motors is that it?
Answers: requires two identical shunt machines
- Plugging
- Regenerative braking
- None of the above
- Rheostatic braking
Question 9: Which of the following methods gives the greatest braking torque?
Answers: Plugging
- no-load
- part load
- overload
- full-load
Question 10: Hopkinson's test on D.C. machines is conducted at?
Answers: full-load
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Total Questions Attempted: 0
Correct: 0 Wrong: 0
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