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Transformers

Transformers
Natural air cooling is generally restricted for transformers up to

50 MVA
1.5 MVA
5 MVA
15 MVA

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Transformers
We can find _______of the transformer with open circuit test.

Copper losses
Total equivalent leakage reactance
Turn ratio
Total equivalent resistance

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Transformers
An isolation transformer has primary to secondady turns ratio of

Can be any ratio
1:2
2:1
1:1

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Transformers
A transformer oil must be free from

Sludge
Odour
Moisture
Gases

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Transformers
When load on a transformer is increased, the eddy current _____

Is decreased
Is increased
Remains unchanged
None of the listed here

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Transformers
In a transformer the energy is conveyed from primary to secondary

through cooling coil
through air
None of these
by the flux

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