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MCQs 1: 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
Answer Explanation

MCQs 2: The wattage of motor for driving domestic sewing machine will be around__________?

100 to 150 W 40 to 75 W 10 to 30 W 5 to 10 W
Answer Explanation

MCQs 3: In case of high speed universal motor which of the following needs more attention?

End play Air gap Insulation in rotor Balancing of rotor
Answer Explanation

MCQs 4: The repulsion-start induction-run motor is used because of___________?

good power factor high efficiency minimum cost high starting torque
Answer Explanation

MCQs 5: 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
Answer Explanation

MCQs 6: Which of the following single-phase induction motors is generally used in time phonographs ?

Resistance start Capacitor start capacitor run Shaded pole Universal
Answer Explanation

MCQs 7: Which of the following motors has highest starting torque ?

Repulsion motor Shaped pole motor Capacitor-start motor Split-phase motor
Answer Explanation

MCQs 8: Which of the following motors can be run on AC. as well as D.C. supply ?

Universal motor Repulsion motor Synchronous motor Reluctance motor
Answer Explanation

MCQs 9: In A.C. series motor compensating winding is employed to_____________?

reduce the effects of armature reaction increase the torque reduce sparking at the brushes none of the above
Answer Explanation

MCQs 10: In a two value capacitor motor, the capacitor used for running purposes is_______________?

air capacitor paper spaced oil filled type ceramic type a.c. electrolytic type
Answer Explanation

MCQs 11: In split-phase motor auxiliary winding is of___________?

thick wire placed at the bottom of the slots thick wire placed at the top of the slots thin wire placed at the top of the slots thin wire placed at the bottom of the slots
Answer Explanation

MCQs 12: Single phase induction motor usually operates on__________?

0.6 power factor lagging 0.8 power factor lagging 0.8 power factor leading unity power factor
Answer Explanation

MCQs 13: Which of the following motors will operate at high power factor ?

Shaped pole motor Split phase motor Capacitor start motor Capacitor run motor
Answer Explanation

MCQs 14: Which of the following single-phase motors is suitable for timing and control purposes ?

Reluctance motor Series motor Repulsion motor Universal motor
Answer Explanation

MCQs 15: A schrage motor can run on___________?

zero slip negative slip positive slip all of the above
Answer Explanation

MCQs 16: A universal motor can run on___________?

A.C. only D.C. only either A.C. or D.C. none of the above
Answer Explanation

MCQs 17: Which of the following motors is preferred for tape-recorders ?

Shaded pole motor Hysteresis motor Two value capacitor motor Universal motor
Answer Explanation

MCQs 18: A single-phase induction motor is__________?

inherently self-starting with high torque inherently self-starting with low torque inherently non-self-starting with low torque inherently non-self-starting with high torque
Answer Explanation

MCQs 19: For which of the applications a reluctance motor is preferred ?

Electric shavers Refrigerators Signalling and timing devices Lifts and hoists
Answer Explanation

MCQs 20: The motor used on small lathes is usually_________?

universal motor D.C. shunt motor single-phase capacitor run motor 3-phase synchronous motor
Answer Explanation

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