Electrical Engineering MCQ on Transformer
Contents
- 1 Short circuit test on transformers is conducted to find
- 2 Efficiency of a power transformer is of the order of
- 3 The resistance between primary and secondary of transformers is
- 4 Natural oil cooling is used for transformers up to a rating of
- 5 A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 Ω. The load resistance as seen by the source is
Short circuit test on transformers is conducted to find
Short circuit test on transformers is conducted to find
- Copper losses
- Core losses
- Eddy current losses
- Hysteresis losses
Correct answer: 1. Copper losses
Efficiency of a power transformer is of the order of
Efficiency of a power transformer is of the order of
- 100 percent
- 25 percent
- 50 percent
- 98 percent
Correct answer: 4. 98 percent
The resistance between primary and secondary of transformers is
The resistance between primary and secondary of transformers is
- 1 ohm
- 1000 ohms
- Infinite
- Zero
Correct answer: 3. Infinite
Natural oil cooling is used for transformers up to a rating of
Natural oil cooling is used for transformers up to a rating of
- 1000 kVA
- 250 kVA
- 3000 kVA
- 500 kVA
Correct answer: 3. 3000 kVA
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 Ω. The load resistance as seen by the source is
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 Ω. The load resistance as seen by the source is
- 13 Ω
- 26 Ω
- 52 Ω
- 78 Ω
Correct answer: 1. 13 Ω