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Transformers
How are transformers generally cooled for installations rated at less than 5kVA ?
None of the listed here
Water cooled
Oil cooled
Air cooled
None of the listed here
Water cooled
Oil cooled
Air cooled
Answer
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Related Question
Transformers
The effect of leakage flux in a transformer is to ______
Increase copper losses
None of the listed here
Cause voltage drop in the windings
Decreases copper losses
Increase copper losses
None of the listed here
Cause voltage drop in the windings
Decreases copper losses
Answer
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Transformers
Leakage flux in a transformer occurs because
Applied voltage is sinusoidal
Transformer is not an efficient device
Iron core has high permeability
Air is not a good magnetic insulator
Applied voltage is sinusoidal
Transformer is not an efficient device
Iron core has high permeability
Air is not a good magnetic insulator
Answer
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Transformers
The dielectric strength of transformer oil is expected to be
lkV
330 kV
100 kV
33 kV
lkV
330 kV
100 kV
33 kV
Answer
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Transformers
Natural oil cooling is used for transformers upto a rating of
250 kVA
500 kVA
3000 kVA
1000 kVA
250 kVA
500 kVA
3000 kVA
1000 kVA
Answer
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Transformers
The iron core is used to ______of the transformer.
Reduce core loss
Provide tight magnetic coupling
None of the listed here
Increase the wight
Reduce core loss
Provide tight magnetic coupling
None of the listed here
Increase the wight
Answer
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