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Transformers

Transformers
Distribution transformers are generally designed for maximum efficiency around

50% load
90% load
25% load
Zero load

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Transformers
Short circuit test of a transformer helps us to find its

Full load cu loss
Cu loss at no load
Iron loss
None of the listed here

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Transformers
Which of the following is not a part of transformer installation?

Exciter
Buchholz relay
Breather
Conservator

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Transformers
The core type transformer provides _______

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

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

Rectangular type
Cylindrical type
Sandwich type
Circular type

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Transformers
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

one-fourth the primary current and equal to the primary current
one-fourth the primary current
four times the primary current
equal to the primary current

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