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Transformers
Natural air cooling is generally restricted for transformers up to
15 MVA
5 MVA
1.5 MVA
50 MVA
15 MVA
5 MVA
1.5 MVA
50 MVA
Answer
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Related Question
Transformers
The iron core is used to ______of the transformer.
None of the listed here
Provide tight magnetic coupling
Increase the wight
Reduce core loss
None of the listed here
Provide tight magnetic coupling
Increase the wight
Reduce core loss
Answer
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Transformers
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
240 V
12 V
120 V
2,400 V
240 V
12 V
120 V
2,400 V
Answer
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Transformers
In which of the following transformer part of primary winding also serves as the secondary winding?
Potential transformer
Auto transformer
Step-up transformer
Current transformer
Potential transformer
Auto transformer
Step-up transformer
Current transformer
Answer
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Transformers
Which of the following is not a part of transformer installation?
Breather
Conservator
Exciter
Buchholz relay
Breather
Conservator
Exciter
Buchholz relay
Answer
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Transformers
If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is
0 W
25 W
250 W
2.5 W
0 W
25 W
250 W
2.5 W
Answer
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