Electrical Engineering MCQ on Transformer
Contents
- 1 The hum in a transformer is primarily attributed to
- 2 Which of the following is not a routine test performed on transformers
- 3 Load shared by two transformers operating in parallel will depend on their
- 4 Gas is generally not liberated because of dissociation of transformer oil unless the oil temperature exceeds
- 5 The main advantage of an auto-transformer over a two winding transformer is
The hum in a transformer is primarily attributed to
The hum in a transformer is primarily attributed to
- Load changes
- Magnetostriction
- Mechanical vibrations
- Oil in the transformer
Correct answer: 2. Magnetostriction
Which of the following is not a routine test performed on transformers
Which of the following is not a routine test performed on transformers
- Core insulation voltage test
- Impedance test
- Polarity test
- Radio interference test
Correct answer: 4. Radio interference test
Load shared by two transformers operating in parallel will depend on their
- Efficiencies
- Leakage reactance
- Per unit impedance
- Ratings
Correct answer: 3. Per unit impedance
Gas is generally not liberated because of dissociation of transformer oil unless the oil temperature exceeds
Gas is generally not liberated because of dissociation of transformer oil unless the oil temperature exceeds
- 100°c
- 150°c
- 200°c
- 50°c
Correct answer: 2. 150°c
The main advantage of an auto-transformer over a two winding transformer is
The main advantage of an auto-transformer over a two winding transformer is
- Copper losses are negligible
- Eddy losses are totally eliminated
- Hysteresis losses are reduced
- Saving in winding material
Correct answer: 4. Saving in winding material