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Transformers
The noise resulting from vibrations of laminations set by magnetic forces, is termed as
Boo
Magnetostriction
Zoom
Hum
Boo
Magnetostriction
Zoom
Hum
Answer
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Related Question
Transformers
Cores of large transformers are built upto nearly circular cross section in order to reduce
Eddy current loss
Iron losses
Leakage reactance
Copper loss
Eddy current loss
Iron losses
Leakage reactance
Copper loss
Answer
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Transformers
When secondary of a current transformer is open-circuited its iron core will be
hot because primary will carry heavy current
none of above will happen
hot because of heavy iron losses taking place in it due to high flux density
cool as there is no secondary current
hot because primary will carry heavy current
none of above will happen
hot because of heavy iron losses taking place in it due to high flux density
cool as there is no secondary current
Answer
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Transformers
A tap changer is used on a transformer for
Adjustments in secondary voltage
Adjustment in primary voltage
Adjustment in both primary and secondary
None of the listed here
Adjustments in secondary voltage
Adjustment in primary voltage
Adjustment in both primary and secondary
None of the listed here
Answer
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Transformers
Which of the following acts as a protection against high voltage surges due to lightning and switching?
Breather
Horn gaps
Conservator
Thermal overload relays
Breather
Horn gaps
Conservator
Thermal overload relays
Answer
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Transformers
Which of the following protection is normally not provided on small distribution transformers?
Overfluxing protection
All of these
Overcurrent protection
Buchholz relay
Overfluxing protection
All of these
Overcurrent protection
Buchholz relay
Answer
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