Induction Motor Theory Quiz
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Question 1 of 9
1. Question
1 pointsA 6 pole 60 HZ induction motor normally runs at which of the following speed?
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Speed = 120 * F / P
= 120 * 60 / 6 = 1200 rpm
It is induction motor speed is less than synchronous speed.
So 1140 rpm 
Question 2 of 9
2. Question
1 pointsWhen the supply voltage to induction motor is fall by 2% what is percentage increase in torque of an induction motor?
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In induction Motor The torque is inversely proportional to square root of the supply voltage.
T ∝ 1 / √ V
So decrease in 2 % will rise the Torque by 4%

Question 3 of 9
3. Question
1 pointsThe slip of the induction motor is always ……………………..
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Question 4 of 9
4. Question
1 pointsWhich of the following reason the starters are used in induction motor?
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Question 5 of 9
5. Question
1 pointsWhen the induction is started on load does not accelerate to full load and runs at lower speed ( 1/7). Under this condition the motor is said to be ………………………..
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Question 6 of 9
6. Question
1 pointsWhich of the following starting method is preferable for smooth starting of squirrel case induction motor?
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Question 7 of 9
7. Question
1 pointsWhen the induction motor runs at rated load and speed the iron losses are negligible.
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Question 8 of 9
8. Question
1 pointsWhich of the following can be varied to change the speed of the induction motor?
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Question 9 of 9
9. Question
1 pointsIn servo applications the motor used is ………………………
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