Question 1: A 6 pole 60 HZ induction motor normally runs at which of the following speed?
- 1140 rpm
- 1240 rpm
- 1220 rpm
- 1500 rpm
BASIC
NEC 2023
Induction Motor Practice Quiz Questions
Free online Electrician Practice Test Questions on Induction Motor Theory Quiz
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TimeInduction Motor Practice Quiz Questions — Question List
Question 2: When the supply voltage to induction motor is fall by 2% what is percentage increase in torque of an induction motor?
- 4 %
- 2 %
- 8 %
- no change
Question 3: The slip of the induction motor is always ..........................
- Greater than unity
- Less than Zero
- Between Zero and Unity
Question 4: Which of the following reason the starters are used in induction motor?
- Its starting torque is high
- Its starting current is five times rated current.
- It drives heavier load during starting
Question 5: When 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 .............................
- locking
- plugging
- cogging
- crawling
Question 6: Which of the following starting method is preferable for smooth starting of squirrel case induction motor?
- star delta
- pony motor
- auto transformer
Question 7: When the induction motor runs at rated load and speed the iron losses are negligible.
- True
- Flase
Question 8: Which of the following can be varied to change the speed of the induction motor?
- Supply voltage only
- Supply Frequency only
- Either supply frequency or supply voltage
Question 9: In servo applications the motor used is ...........................
- universal motor
- two phase induction motor
- three phase induction motor
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