Single phase induction motors

51. The purpose of stator winding in the compensated repulsion motor is to

provide mechanical balance
improve power factor and provide better speed regulation
prevent hunting in the motor
eliminate armature reaction

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class="screen-reader-text">The purpose of stator winding in the compensated repulsion motor is to

52. Which of the following motors can be used for unity power factor ?

Capacitor run motor
Shaded pole motor
Hysteresis motor
Schrage motor

Detailed SolutionWhich of the

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following motors can be used for unity power factor ?

53. Which of the following motors can be run on AC. as well as D.C. supply ?

Universal motor
Repulsion motor
as well as
Reluctance motor

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D.C. supply ?" class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-motors-can-be-run-on-ac-as-well-as-d-c-supply/#more-50821">Detailed SolutionWhich of the following motors can be run on AC. as well as D.C. supply ?

54. Which of the following statements regarding a reluctance motor is incorrect ?

It cannot be reversed, ordinarily
It requires no D.
field excitation for its operation C. It is nothing else but a single-phase, salient pole synchronous-induction motor

Detailed SolutionWhich of the following statements regarding a reluctance motor is incorrect ?

55. The range of efficiency for shaded pole motors is

95% to 99%
80% to 90%
50% to 75%
5% to 35%

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shaded pole motors is" class="read-more button" href="https://exam.pscnotes.com/mcq/the-range-of-efficiency-for-shaded-pole-motors-is/#more-50594">Detailed SolutionThe range of efficiency for shaded pole motors is

56. In

reduce the effects of armature reaction
increase the torque
none of the above

Detailed SolutionIn

57. Short-circuiter is used in

Repulsion induction motor
Repulsion motor
Repulsion start induction run motor
None of the above

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used in" class="read-more button" href="https://exam.pscnotes.com/mcq/short-circuiter-is-used-in/#more-50525">Detailed SolutionShort-circuiter is used in

58. Which of the following statements regarding hysteresis motor is in incorrect ?

It is extremely sensitive to fluctuations in supply voltage
Its high starting torque is due to its high rotor hysteresis loss
It is extremely quiet in operation
It accelerates from rest to full-speed almost instantaneously

Detailed SolutionWhich of the following statements regarding hysteresis motor is in incorrect ?

59. The capacitors used in single-phase capacitor motors have no

voltage rating
dielectric medium
polarity marking
definite value

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href="https://exam.pscnotes.com/mcq/the-capacitors-used-in-single-phase-capacitor-motors-have-no/#more-50418">Detailed SolutionThe capacitors used in single-phase capacitor motors have no

60. In case of a shaded pole motor the direction of rotation of the motor is

from main pole to shaded pole
from shaded pole to main pole
either of the above depending on voltage
either of the above depending on power factor

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title="In case of a shaded pole motor the direction of rotation of the motor is" class="read-more button" href="https://exam.pscnotes.com/mcq/in-case-of-a-shaded-pole-motor-the-direction-of-rotation-of-the-motor-is/#more-49981">Detailed SolutionIn case of a shaded pole motor the direction of rotation of the motor is

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