Single phase induction motors

61. Which motor is normally free from mechanical and magnetic vibrations ?

Split phase motor
Universal motor
Hysteresis motor
Shaded pole motor

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href="https://exam.pscnotes.com/mcq/which-motor-is-normally-free-from-mechanical-and-magnetic-vibrations/#more-49813">Detailed SolutionWhich motor is normally free from mechanical and magnetic vibrations ?

62. Which of the following motors is inherently self starting ?

Split motor
Shaded-pole motor
Reluctance motor
None of these

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63. In case of high speed universal motor which of the following needs more attention ?

End play
Air gap
Insulation in rotor
Balancing of rotor

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24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
button" href="https://exam.pscnotes.com/mcq/in-case-of-high-speed-universal-motor-which-of-the-following-needs-more-attention/#more-49576">Detailed SolutionIn case of high speed universal motor which of the following needs more attention ?

64. When a D.C. series motor is connected to

high inductance of field and armature circuits
induced current in rotor due to variations of flux
none of the above

Detailed SolutionWhen a D.C. series motor is connected to

65. A universal motor can run on

D.C. only
D.
only B.
none of the above

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81.2-142.7 81.2z"/> Subscribe on YouTube class="read-more button" href="https://exam.pscnotes.com/mcq/a-universal-motor-can-run-on/#more-49503">Detailed SolutionA universal motor can run on

66. In repulsion motor, maximum torque is developed when

brush axis is at 45° electrical to the field axis
brush axis coincides with the field axis
brush axis is at 90° electrical to the field axis
none of the above

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24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube torque is developed when" class="read-more button" href="https://exam.pscnotes.com/mcq/in-repulsion-motor-maximum-torque-is-developed-when/#more-49195">Detailed SolutionIn repulsion motor, maximum torque is developed when

67. The wattage rating for a ceiling fan motor will be in the range

200 to 250 W
250 to 500 W
50 to 150 W
10 to 20 W

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6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube motor will be in the range" class="read-more button" href="https://exam.pscnotes.com/mcq/the-wattage-rating-for-a-ceiling-fan-motor-will-be-in-the-range/#more-48907">Detailed SolutionThe wattage rating for a ceiling fan motor will be in the range

68. Which of the following motor will give the highest starting torque ?

D.C. shunt motor
Schrage motor
shunt motor B. Schrage motor C. Repulsion start and induction run motor
Universal motor

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64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube give the highest starting torque ?" class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-motor-will-give-the-highest-starting-torque/#more-48615">Detailed SolutionWhich of the following motor will give the highest starting torque ?

69. Which of the following statements regarding reluctance-start motor is incorrect ?

It is similar to reluctance motor
It is basically an induction motor and not a synchronous one
So far as its basic working principle is concerned, it is similar to shaded pole motor
the air-gap between rotor and salient poles is non- uniform

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class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-statements-regarding-reluctance-start-motor-is-incorrect/#more-48444">Detailed SolutionWhich of the following statements regarding reluctance-start motor is incorrect ?

70. Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because

it is comparatively cheaper
it has almost non-destructible capacitor
it has low starting as well as running currents at relatively high power factor
it is quiet in operation

Detailed

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SolutionTwo-value capacitor motor finds increased application as compressor motor in small home air-conditioners because

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