Transformer MCQs Part 28

Electrical Engineering MCQs on Transformer MCQs Part 28

A transformer works on

A transformer works on:

1. AC only
2. DC only
3. Both of these
4. None of these

Correct answer: 1. AC only

Explanation: The transformer is an electrical device that changes AC electric power at one voltage level to ac electric power at another voltage level by the action of magnetic field. A transformer comprises of two or more wire coils that are wrapped around common ferromagnetic core.

The no-load power factor of transformer is small due to which of following reason

The no-load power factor of transformer is small due to which of following reason:

1. Magnetizing component of Io is large
2. Iron loss component of Io is large
3. Magnetizing component of Io is small
4. None of these

Correct answer: 1. Magnetizing component of Io is large

The ordinary efficiency of a transformer will be maximum when

The ordinary efficiency of a transformer will be maximum when

1. It runs at quarter-full load
2. It runs at half-full load
3. Eddy Current Losses = Copper Losses
4. Copper losses = Iron losses

Correct answer: 4. Copper losses = Iron losses

Buchholz’s relay can be fixed on

Buchholz’s relay can be fixed on:

1. Air-cooled transformers
2. Auto-transformers
3. Oil cooled transformers
4. Welding transformers

Correct answer: 3. Oil cooled transformers

The winding of transformer with greater number of turns will be

The winding of transformer with greater number of turns will be:

1. Low voltage winding
2. High voltage winding
3. Either of above
4. None of above

Correct answer: 2. High voltage winding

See More MCQs on Electrical Engineering:

1. Basic Electrical Laws and Theorems
2. Basic Voltage and Current MCQs
3. High Voltage Engineering MCQs
4. Induction Motor MCQs
5. Power Electronics
6. Power Distribution MCQs
7. Power Generation MCQs
8. Power System Protection MCQs
9. Power Transmission and Distribution MCQs
10. Synchronous Generator MCQs
11. Synchronous motor MCQs
12. Transformer MCQs