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Transformers

Transformers
A transformer will have zero efficiency at

Half full load
Full load
No load
None of the listed here

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Transformers
Which type of winding is used in 3phase shell-type transformer?

Rectangular type
Cylindrical type
Circular type
Sandwich type

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

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

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Transformers
Which of the following transformer is smallest?

2kVA, 400 Hz
2kVA, 200 Hz
2kVA, 50 Hz
2kVA, 500 Hz

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Transformers
Harmonics in transformer result in

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

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Transformers
Which winding of the transformer has less cross-sectional area?

Primary winding
Low voltage winding
High voltage winding
Secondary winding

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MORE MCQ ON Transformers

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