91. |
The primary reason why the open-circuit test is performed on the low-voltage winding of the transformer is that it
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Answer:
Option (a) |
92. |
The short circuit test on a transformer is conducted to obtain
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Answer:
Option (b) |
93. |
During the short-circuit test, the iron loss of a transformer is negligible because
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Answer:
Option (b) |
94. |
For a 1.15 kVA 230/460V transformer connected to a standard 1–phase 230V supply, the no-load current likely to be
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Answer:
Option (a) |
95. |
A transformer having a voltage ratio of 3000/300 V takes a current of 0.7 A from the primary at a power factor of 0.6 under open circuit condition. Calculate the magnetizing current of the transformer.
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Answer:
Option (b) |
96. |
The voltage applied to the h.v. side of a transformer during the short-circuit test is 2% of its rated voltage. The core loss will be.......percent of the rated core loss.
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Answer:
Option (d) |
97. |
Which test on a transformer provides information about regulation, efficiency, and heating under load conditions?
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Answer:
Option (a) |
98. |
When does the Y-Y connection of a transformer work satisfactorily?
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Answer:
Option (b) |
99. |
When does the ∆ − ∆ connected transformer work satisfactorily?
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Answer:
Option (c) |
100. |
What is the ratio of transformation of Y-Y connection?
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Answer:
Option (a) |