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Transformers

Transformers
The noise produced by a transformer is termed as

zoom
buzz
hum
ringing

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

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

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Transformers
Natural oil cooling is used for transformers up to a rating of

250 kVA
1000 kVA
500 kVA
3000 kVA

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Transformers
The dielectric strength of transformer oil is expected to be

lkV
33 kV
100 kV
330 kV

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Transformers
Which winding in a transformer has more number of turns?

High voltage winding
Primary winding
Secondary winding
Low voltage winding

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Transformers
A transformer will work on

Ac only
Dc only
None of the listed here
AC as well as DC

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MORE MCQ ON Transformers

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