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Transformers

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

Buchholz relay
Conservator
Breather
Exciter

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Transformers
A transformer is an efficient device because

Uses inductive coupling
Uses capacitive coupling
Uses electric coupling
A static device

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Transformers
The efficiency of a transformer will be maximum when ______

None of the listed here
Copper loss is equal to constant loss
Leakage reactance of the two winding
Resistance of the two winding are equal

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Transformers
Short circuit test of a transformer helps us to find its

Full load cu loss
None of the listed here
Cu loss at no load
Iron loss

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Transformers
Sumpner's test is conducted on transformers to determine

stray losses
temperature
all-day efficiency
None of these

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Transformers
The noise produced by a transformer is termed as

ringing
hum
buzz
zoom

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