Computer Programming MCQs

5739 MCQs  (Page 60 of 574)

Attempt Computer Programming MCQs Quiz
In medium sized induction motors, the slip is generally around___________?
A. 0.04%
B. 0.4%
C. 4%
D. 14%
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In squirrel cage induction motors, the rotor slots are usually given slight skew in order to__________?
A. Reduce windage losses
B. Reduce eddy currents
C. Reduce accumulation of dirt and dust
D. Reduce magnetic hum
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In case the air gap in an induction motor is increased____________?
A. The magnetising current of the rotor will decrease
B. The power factor will decrease
C. Speed of motor will increase
D. The windage losses will increase
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Slip rings are usually made of___________?
A. Copper
B. Carbon
C. Phospor bronze
D. Aluminium
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In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be___________?
A. Ns
B. S.n,
C. (l-s)ns
D. (ns-l)s
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The starting torque of a squirrel-cage induction motor is___________?
A. Low
B. Negligible
C. Same as full-load torque
D. Slightly more than full-load torque
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Star-delta starting of motors is not possible in case of____________?
A. Single phase motors
B. Variable speed motors
C. Low horse power motors
D. High speed motors
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A double squirrel-cage induction motor has______________?
A. Two rotors moving in oppsite direction
B. Two parallel windings in stator
C. Two parallel windings in rotor
D. Two series windings in stator
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The good power factor of an induction motor can be achieved if the average flux density in the air gap is___________?
A. Absent
B. Small
C. Large
D. Infinity
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In case of the induction motors the torque is___________?
A. Inversely proportional to (vslip)
B. Directly proportional to (slip)2
C. Inversely proportional to slip
D. Directly proportional to slip
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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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