Electrical Engineering MCQs

Page No. 260

In case of a shaded pole motor the direction of rotation of the motor is__________?


a from main pole to shaded pole

✓


b from shaded pole to main pole

✖


ceither of the above depending on voltage

✖


d either of the above depending on power factor

✖



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


a Resistance start

✖


bCapacitor start capacitor run

✖


cShaded pole

✓


d Universal

✖


View Answer Shaded pole

Which of the following motors has highest starting torque ?


aRepulsion motor

✖


bShaped pole motor

✖


cCapacitor-start motor

✓


d Split-phase motor

✖


View Answer Capacitor-start motor

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


aUniversal motor

✓


bRepulsion motor

✖


cSynchronous motor

✖


dReluctance motor

✖


View Answer Universal motor

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


areduce the effects of armature reaction

✖


b increase the torque

✖


creduce sparking at the brushes

✓


dnone of the above

✖



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


aair capacitor

✖


bpaper spaced oil filled type

✓


cceramic type

✖


d a.c. electrolytic type

✖



In split-phase motor auxiliary winding is of___________?


athick wire placed at the bottom of the slots

✖


bthick wire placed at the top of the slots

✖


cthin wire placed at the top of the slots

✓


d thin wire placed at the bottom of the slots

✖



Single phase induction motor usually operates on__________?


a 0.6 power factor lagging

✓


b 0.8 power factor lagging

✖


c0.8 power factor leading

✖


dunity power factor

✖



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


aShaped pole motor

✖


bSplit phase motor

✖


cCapacitor start motor

✖


dCapacitor run motor

✓


View Answer Capacitor run motor

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


aReluctance motor

✓


b Series motor

✖


cRepulsion motor

✖


dUniversal motor

✖


View Answer Reluctance motor

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