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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. The emf equation of a single phase transformer in secondary side is _______
2. Which of the following relays is used on transformer?
3. Which of the following parts of a transformer is visible from outside?
4. Primary winding has 450 turns and secondary winding has 90 turns. What will be the secondary voltage if the primary voltage is 220 volt?
5. Layer of low voltage winding in a transformer is placed nearer the core so that _____
6. Which of the following is not a part of transformer installation?
7. What is the full load current if 1KVA, 240V / 120V rated single phase transformer at 0.8 PF?
8. In larger transformers a stepped core arrangement is used to minimize the use of copper and _____
9. Use of superior quantity laminated CRGO silicon iron sheet reduces _______
10. The primary impedance of a transformer is given by ______
11. In a power transformer the current flowing in the coil connected to the AC source is ______
12. The secondary impedance of a transformer is given by ______
13. The transformation ratio (K) is more than 1 then the transformer is a ______
14. The purpose of providing an iron core in a transformer is to _______
15. Primary current in a transformer is determined by ______
16. A 5KVA, 400 V/ 200 V transformer delivers of 25 Amps in secondary. What is the current in primary side?
17. The transformer cores are insulated from each other by _______
18. The path of a magnetic flux in a transformer should have _______
19. Transformer lamination thickness for 50Hz is _______
20. The magnetizing current (Im) is very small in magnitude and lags the applied voltage (Vp) by ______
21. Transformers are rated in terms of KVA instead of KW because ______
22. Small type transformer core for shell type generally used _______
23. The function of the magnetizing current (Im) is to ______
24. The transformers are rated in ______
25. No – Load current of a transformer has ______

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