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Transformers

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

Commutator
Breather
Conservator
Buchholz's relay

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Transformers
Burden of a current transformer is usually expressed in

Amperes
Kilowatt
Volts
Volt amperes

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Transformers
A common method of cooling a power transformer is

air blast cooling
natural air cooling
Any of these
oil cooling

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Transformers
Transformer breaths in when

load remains constant
load on it decreases
None of these
load on it increases

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Transformers
Natural oil cooling is used for transformers upto a rating of

250 kVA
1000 kVA
3000 kVA
500 kVA

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Transformers
The all day efficiency of a transformer is ______ the commercial efficiency.

Less than
The same as
None of the listed here
More than

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