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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