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Transformers

Transformers
The noise produced by a transformer is termed as

buzz
zoom
ringing
hum

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Transformers
Distribution transformers are generally designed for maximum efficiency around

Zero load
90% load
50% load
25% load

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Transformers
The power transformer is a constant

Current device
Power device
Main flux device
Voltage device

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Transformers
When load on a transformer is increased, the eddy current _____

Is increased
Remains unchanged
Is decreased
None of the listed here

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Transformers
Which of the following 3 phase connections of transformer create disturbances in communication systems

Delta/Delta
Star/Delta
Star/Star
Delta/Star

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Transformers
The steel used for transformer core has

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

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