Transformer MCQs
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Avg score: 23% • Most missed: “The secondary winding of which of the given transformer is always kept closed?”
Transformer MCQs
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25 Questions

1. The frictional loss in a transformer is
2. Which of the given test determine the iron loss of the transformer?
3. The maximum load that a power transformer can carry is limited by its
4. If a transformer is connected to a direct current supply, what happened?
5. A transformer
6. In a transformer, the resistance between its primary and secondary is
7. A transformer has a primary coil with 1600 loops and a secondary coil with 1200 loops. If the current in the primary coil is 6 Ampere, then what is the current in the secondary coil of a transformer.
8. The efficiency of a transformer is maximum when
9. Which of the following part is not associated with the transformer?
10. In a transformer, tappings are usually provided.
11. If the supply frequency (f) of a transformer decreases, the effect of frequency on the transformer's secondary output voltage?
12. Which winding in a transformer has a greater number of turns
13. The direction of magnetic flux in a transformer must have
14. Which test determines the efficiency of two identical transformers under load conditions?
15. Buck-boost transformers are used when
16. Oil is provided in an oil-filled transformer for
17. Open circuit test in a transformer is used to determine
18. The secondary voltage is 440 Volt, and primary voltage is 220 Volt, then a comparison of the secondary coil and primary coil is
19. Transformer core are laminated in order to
20. Power transformers are designed to have maximum efficiency at
21. The primary purpose of performing a short circuit test in a transformer is to measure its
22. Lamination of the transformer core is made up of
23. A Buchholz relay can be installed on
24. A transformer has negative voltage regulation, only if its load power factor is
25. The short circuit test in the transformer is performed on

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