Electrical Engineering MCQs on Transformer
The complete circle diagram of induction motor can be drawn with the help of data found from
The complete circle diagram of induction motor can be drawn with the help of data found from
- Blocked rotor test
- No-load test
- Stator resistance test
- All of above tests
Correct answer: 4. All of above tests
Insertion of resistance in the rotor of an induction motor to develop a given torque has which of following impacts
Insertion of resistance in the rotor of an induction motor to develop a given torque has which of following impacts
- It causes rotor current to become zero
- It causes rotor current to remain same
- It decreases the rotor current
- It increases the rotor current
Correct answer: 2. It causes rotor current to remain same
A transformer can have regulation closer to zero for which of following conditions
A transformer can have regulation closer to zero for which of following conditions
- On full-load
- On leading power factor
- On overload
- On zero power factor
Correct answer: 2. On leading power factor
The loss in a transformer that is zero even at full load
The loss in a transformer that is zero even at full load
- Core loss
- Eddy current loss
- Friction loss
- Hysteresis loss
Correct answer: 3. Friction loss
The ‘crawling’ in an induction motor happens due to
The ‘crawling’ in an induction motor happens due to
- Harmonics developed in the motor
- High loads
- Improper design of machine
- Low voltage supply
Correct answer: 1. Harmonics developed in the motor