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Transformers

Transformers
A transformer has 200 W as iron loss at full load. The iron loss at full load. The iron loss at half full load will be

50 W
200 W
400 W
100 W

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Transformers
In an auto transformer, the primary and secondary are _____ coupled.

Only electrically
None of the listed here
Magnetically as well as electrically
Only magnetically

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Transformers
Two things which are same for primary and secondary of transformer are ______

Currents and induced voltages
None of the listed here
Resistance and leakage reactances
Ampere turns and voltage per turns

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Transformers
Which of the following is not a fitting on a transformer?

Commutator
Breather
Buchholz's relay
Conservator

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Transformers
A transformer transfers electrical energy from primary to secondary usually with a change in ______

Power
Voltage
Frequency
Time period

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Transformers
Which of the following is not a part of transformer installation?

Conservator
Exciter
Breather
Buchholz relay

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