Electrical Engineering MCQ on Transformer
Contents
- 1 An ideal transformer has infinite values of primary and secondary inductances. The statement is
- 2 Which of following is not a part of transformer installation
- 3 No-load current in a transformer
- 4 The role of breather in a transformer is
- 5 Energy is conveyed from primary to secondary in a transformer
- 6 Star/star transformers work suitably in case when
An ideal transformer has infinite values of primary and secondary inductances. The statement is
An ideal transformer has infinite values of primary and secondary inductances. The statement is
- Correct
- Incorrect
- Any of above
- None of above
Correct answer: 2. Incorrect
Which of following is not a part of transformer installation
Which of following is not a part of transformer installation
- Breather
- Buchholz relay
- Conservator
- Exciter
Correct answer: 4. Exciter
Also see: Exciters of synchronous machines are
No-load current in a transformer
No-load current in a transformer
- Lags behind the voltage by about 15°
- Lags behind the voltage by about 75°
- Leads the voltage by about 15°
- Leads the voltage by about 75°
Correct answer: 2. Lags behind the voltage by about 75°
The role of breather in a transformer is
The role of breather in a transformer is
- To arrest flow of moisture when outside air enters the transformer
- To cool the coils during reduced load
- To cool the transformer oil
- To provide oxygen inside the tank
Correct answer: 1. To arrest flow of moisture when outside air enters the transformer
Energy is conveyed from primary to secondary in a transformer
Energy is conveyed from primary to secondary in a transformer
- By the flux
- Through air
- Through cooling coil
- None of above
Correct answer: 1. By the flux
Star/star transformers work suitably in case when
Star/star transformers work suitably in case when
- Load is balanced only
- Load is unbalanced only
- On balanced as well as unbalanced loads
- None of above
Correct answer: 1. Load is balanced only