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Transformers MCQ | Part - 1
1. A transformer transforms A. Voltage B. Frequency C. Current and voltage D. Current Answer: C 2. A transformer has negative voltage regulation, only if its load power factor is A. Leading B. Unity C. Lagging D. None of these Answer: A 3. In an autotransformer, the primary and secondary are ....... Coupled. A. Magnetically coupled B. Electrically coupled C. Both magnetically and electrically coupled. D. None of these Answer: C 4. Crushed rocks are provided in the substation to A. To avoid growing plants and weeds. B. To provide insulation C. To avoid fire accidents during leakage of transformer oil. D. All of the above Answer: D 5. The maximum load that a power transformer can carry is limited by its A. Voltage ratio B. Dielectric strength of the coil C. Copper loss D. Temperature rise Answer: A 6. When the supply frequency of a transformer increases, the secondary output voltage of the transformer A. Decreases B. Increases C. Constant D. None of these Answer: C 7. Open circuit ...
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