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Electrician Set-1
Single Phase Motors
49

Single Phase Motors MCQ - Electrician (Set-1) with Answers

49) Single phase induction motors are more noisy than 3-phase induction motors because of

inherently low power rating

squirrel cage rotor design

pulsating electrical power input

constant mechanical power output

Answer is:

pulsating electrical power input

Single Phase Motors MCQ - Electrician (Set-1) with Answers

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Related Single Phase Motors MCQ - Electrician (Set-1) with Answers

50) The direction of rotation of a capacitor start single phase induction motor can be reversed by interchanging terminals of

capacitor

supply

centrifugal switch

starting winding

Answer is:

starting winding

51) The type of single phase induction motor having the highest power factor at full load is

shaded pole type

split phase type

capacitor start type

capacitor run type

Answer is:

capacitor run type

52) An electric motor gets overheated. This may be due to

over loading

shorted stator winding

worn out bearings

low or high voltage

Answer is:

worn out bearings

53) If a single phase motor fails to start, but gives humming noise, this may be due to

low voltage

high voltage

shorted stator winding

blown fuses

Answer is:

shorted stator winding

Single Phase Motors MCQ - Electrician (Set-1) with Answers

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