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Transformers

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

Buchholz's relay
Commutator
Breather
Conservator

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Transformers
Which of the following property is not necessarily desirable in the material for transformer core?

Low hysteresis loss
High thermal conductivity
Mechanical strength
High permeability

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Transformers
When secondary of a current transformer is open-circuited its iron core will be

hot because of heavy iron losses taking place in it due to high flux density
none of above will happen
cool as there is no secondary current
hot because primary will carry heavy current

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Transformers
The primary leakage flux links _____

Primary winding only
None of the listed here
Both primary and secondary windings
Secondary winding only

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Transformers
The iron core is used to ______of the transformer.

Increase the wight
Reduce core loss
None of the listed here
Provide tight magnetic coupling

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Transformers
The hum in a transformer is mainly attributed to

mechanical vibrations
magnetostriction
load changes
oil in the transformer

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MORE MCQ ON Transformers

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