Synchronous Motor MCQ Part 5.
Multiple choice questions on Synchronous motor.
What is value of full load slip of synchronous motor
What is value of full load slip of synchronous motor:
- 1%
- 3%
- 8%
- 0
Correct answer: 4. 0
The value of full load slip of synchronous motor is 0
Which factor determines the size of synchronous motor
Which factor determines the size of synchronous motor:
- kW rating
- kVA rating
- kVAR rating
Correct answer: 2. kVA rating
The kVA rating of synchronous motor determines its size.
When synchronous motor turns at synchronous speed what is the value of voltage induced in damper winding
When synchronous motor turns at synchronous speed what is the value of voltage induced in damper winding:
- Minimum
- Half of maximum
- Maximum
- Zero
Correct answer: 4. Zero
When synchronous motor turn at synchronous speed the value of voltage induced in damper winding is zero
What is the relationship between mechanical power developed by synchronous motor is and stator voltage
The mechanical power developed by synchronous motor is ________________ stator voltage:
- Inversely proportional
- Directly proportional
- Exponentially related
- Inversely proportional to square of
Correct answer: 2. Directly proportional
The mechanical power developed by synchronous motor is directly proportional to the stator voltage
Why damper winding is used in synchronous motor
The damper winding is used in synchronous motor for which of the following reason:
- For improving efficiency
- For improving power factor
- For eliminating hunting in motor
- None of above
Correct answer: 2. For eliminating hunting in motor
Damper winding or amortisseur winding is used in synchronous motor for eliminating hunting in motor.