Single phase induction motors

a capacitor start single-phase motor, when capacitor is replaced by a resistance" class="read-more button" href="https://exam.pscnotes.com/mcq/in-a-capacitor-start-single-phase-motor-when-capacitor-is-replaced-by-a-resistance/#more-54426">Detailed SolutionIn a capacitor start single-phase motor, when capacitor is replaced by a resistance

32. In a shaded pole single-phase motor, the revolving field is produced by the use of

inductor
capacitor
resistor
shading coils

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button" href="https://exam.pscnotes.com/mcq/in-a-shaded-pole-single-phase-motor-the-revolving-field-is-produced-by-the-use-of/#more-54073">Detailed SolutionIn a shaded pole single-phase motor, the revolving field is produced by the use of

33. The electric motor used in portable drills is

capacitor run motor
hysteresis motor
universal motor
repulsion motor

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href="https://exam.pscnotes.com/mcq/the-electric-motor-used-in-portable-drills-is/#more-54056">Detailed SolutionThe electric motor used in portable drills is

34. Which of the following motors is used in tape-recorders ?

Hysteresis motor
Reluctance motor
Capacitor-run motor
Universal motor

Detailed

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SolutionWhich of the following motors is used in tape-recorders ?

35. For which of the applications a reluctance motor is preferred ?

Electric shavers
Refrigerators
Signalling and timing devices
Lifts and hoists

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is preferred ?" class="read-more button" href="https://exam.pscnotes.com/mcq/for-which-of-the-applications-a-reluctance-motor-is-preferred/#more-54004">Detailed SolutionFor which of the applications a reluctance motor is preferred ?

36. In a universal motor, the most common cause of brush sparking is

open armature winding
shorted armature winding
shorted field winding?
high commutator mica E. all of the above

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cause of brush sparking is" class="read-more button" href="https://exam.pscnotes.com/mcq/in-a-universal-motor-the-most-common-cause-of-brush-sparking-is/#more-53827">Detailed SolutionIn a universal motor, the most common cause of brush sparking is

37. If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then

motor will not come up to speed
motor will not carry the load
current drawn by the motor will be excessively high
electrolytic capacitor will, in all probability, suffer break down

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title="If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then" class="read-more button" href="https://exam.pscnotes.com/mcq/if-the-centrifugal-switch-of-a-two-value-capacitor-motor-using-two-capacitors-fails-to-open-then/#more-53616">Detailed SolutionIf the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then

38. To reverse the direction of rotation of acapacitor start motor while it is running we should

disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding
disconnect motor from supply and immediately reconnect it to supply with reversed con-nections of the main winding
reverse the direction of connection of the auxiliary winding and after motor comes to rest then connect auxiliary winding to the supply

Detailed SolutionTo reverse the direction of rotation of acapacitor start motor while it is running we should

39. The power factor of a single-phase induction motor is usually

lagging
always leading
unity
unity to 0.8 leading

Detailed

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SolutionThe power factor of a single-phase induction motor is usually

40. Which of the following single-phase induction motors is generally used in time phonographs?

Resistance start
Capacitor start capacitor run
Shaded pole
Universal

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phonographs?" class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-single-phase-induction-motors-is-generally-used-in-time-phonographs/#more-52991">Detailed SolutionWhich of the following single-phase induction motors is generally used in time phonographs?

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