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Transformers

Transformers
The no load primary current is about ______of full load primary current.

Above 40%
15-30%
3-5%
30-40%

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Transformers
The permissible flux density in case of cold rolled grain oriented steel is around

2.7 Wb/m²
1.7 Wb/m²
4.7 Wb/m²
3.7 Wb/m²

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Transformers
The primary and secondary windings are wound on the top of each other in order to reduce ______

Winding resistance
Iron losses
Copper losses
Leakage reactance

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Transformers
The core type transformer provides _______

Shorter magnetic path
None of the listed here
Lesser average length per turn
Much longer magnetic path

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Transformers
The winding of the transformer with greater number of turns will be _____

Low voltage winding
None of the listed here
High voltage winding
Either high or low voltage winding

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

Conservator
Buchholz's relay
Commutator
Breather

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