Electrical Engineering Questions And Answers :: Single Phase Induction Motors: part4



Electrical Engineering : Single Phase Induction Motors QUESTIONS AND ANSWERS :: part4 : 1 to 5

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

1.Most of the fractional horsepower motors have either

hard and annealed bearings
ball or roller bearings
soft and porous bearings
plain or sleeve bearings

2.After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on

running winding
rotor winding
field winding
compensating winding

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

open armature winding
shorted armature winding
shorted field winding"
high commutator mica

4.Speed control of a universal motor is achieved by

varying field flux with tapped field windings
connecting rheostat in series
applying variable voltage by means of silicon controlled rectifier
applying variable voltage by means of variable auto-transformer

5.A universal motor is one which

can be operated either on D.C. or A.C. supply at approximately the same speed and output
can be marketed internationally
runs at dangerously high speed on no-load
can be operated either on D.C. or A.C. supply at approximately the same speed and output

More Single Phase Induction Motors QUESTIONS AND ANSWERS available in next pages

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