Computer Programming MCQs

5739 MCQs  (Page 50 of 574)

Attempt Computer Programming MCQs Quiz
Which D.C. motor has got maximum self relieving property ?
A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motor
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In the D.C. motor the iron losses occur in____________?
A. The field
B. The armature
C. The brushes
D. The commutator
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The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by______________?
A. Reducing the field current
B. Decreasing the armature current
C. Increasing the armature current
D. Increasing the excitation current
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One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven_______________?
A. Runs as a generator
B. Does not run as a generator
C. Also runs as a motor comes to stop after sometime
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If the load on a DC shunt motor is increases, its speed is slightly reduced due to______________?
A. increase in armature current
B. increase in flux
C. decrease in reactance
D. decrease in back emf
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In which of the following device the generated emf and armature current are in the opposite directions?
A. dc generator
B. dc motor
C. transformer
D. all of the above
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With the increase in temperature, the speed of DC shunt motor____________?
A. Decreases.
B. Increases
C. Remain same
D. None of the above
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With the increase in temperature, the speed of DC series motor______________?
A. decreases
B. increases
C. remain same
D. none of the above
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Which of the following method is used for the speed control of DC shunt motor?
A. voltage control method
B. flux control method
C. rheostat control method
D. all of the above
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A dc series motor should not be started on no load because it would___________?
A. not develop starting torque
B. fail to start without load
C. run at dangerously high speed
D. draw more current without producing sufficient torque
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Word of the Day
14 Jul
Obscenity
the state or quality of being obscene.
بےہودگی، فحاشی، بے شرمی

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