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Wireman Practice Test: Transformer
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Avg score: 66% • Most missed: “In the two winding transformer, the load (output) side is known as ______”
Wireman Practice Test: Transformer
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25 Questions

1. Transformer efficiency is more because ______
2. What will happen to 415V / 240V, 1KVA transformer when it is connected to a DC supply?
3. Auto transformer are mainly used for _____
4. The emf equation of a single phase transformer in secondary side is _______
5. What will be the colour of the silica gel, after it absorbs moisture from air?
6. The transformation ratio of the transformer depends upon the ______
7. Small type transformer core for shell type generally used _______
8. Which type of transformer winding has no ohmic resistance and leakage resulting in no losses?
9. The application of auto transformer is _____
10. The transformer oil acidity value of 0.2 indicates the colour ____
11. Transformer action requires ______
12. The transformers are rated in ______
13. A 100KVA, 2400V/240V, 50HZ transformer has 300 turns on the secondary winding. Calculate the number of turn in the primary winding?
14. The chemical used in breather for transformer should have the quality of _____
15. What is the working principle of auto transformer?
16. In which material core of the transformer is constructed?
17. A sort of drum mounted on the top of the transformer with a level indicator is _____
18. The transformer cores are insulated from each other by _______
19. Primary winding has 450 turns and secondary winding has 90 turns. What will be the secondary voltage if the primary voltage is 220 volt?
20. What is the full load current if 1KVA, 240V / 120V rated single phase transformer at 0.8 PF?
21. Transformer lamination thickness for 50Hz is _______
22. The regulation of a transformer increase with increase of _____
23. Calculate the current in low voltage side of the 1KVA, 240V/120V single phase transformer?
24. Buchholz relay is generally used for the protection of _______
25. The secondary impedance of a transformer is given by ______

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