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Transformers

Transformers
The noise resulting from vibrations of laminations set by magnetic forces, is termed as

Boo
Hum
Magnetostriction
Zoom

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

Breather
Conservator
Exciter
Buchholz relay

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Transformers
A step up transformer increases

Power
Frequency
Voltage
Current

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Transformers
The all day efficiency of a transformer is also called its

None of the listed here
Energy efficiency
Current efficiency
Power efficiency

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Transformers
Harmonics in transformer result in

All of the listed here
increased core losses
magnetic interference with communication circuits
increased I2R losses

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Transformers
The steel used for transformer core has

Low hysteresis loss
High permeability
High silicon content
All of the listed here

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