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Transformers
Natural oil cooling is used for transformers upto a rating of
500 kVA
1000 kVA
250 kVA
3000 kVA
500 kVA
1000 kVA
250 kVA
3000 kVA
Answer
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Related Question
Transformers
The approximate efficiency of a large transformer is
95%
50%
65%
80%
95%
50%
65%
80%
Answer
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Transformers
Which of the following property is not necessarily desirable in the material for transformer core?
Low hysteresis loss
High permeability
High thermal conductivity
Mechanical strength
Low hysteresis loss
High permeability
High thermal conductivity
Mechanical strength
Answer
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Transformers
By laminating the core of a transformer, we decrease _____
Hysteresis loss
Eddy current loss
Leakage reactance
Copper loss
Hysteresis loss
Eddy current loss
Leakage reactance
Copper loss
Answer
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Transformers
For the parallel operation of single phase transformers it is necessary that they should have
same kVA rating
same efficiency
same polarity
same number of turns on the secondary side.
same kVA rating
same efficiency
same polarity
same number of turns on the secondary side.
Answer
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Transformers
Which of the following is the main advantage of an auto-transformer over a two winding transformer?
Hysteresis losses are reduced
Copper losses are negligible
Eddy losses are totally eliminated
Saving in winding material
Hysteresis losses are reduced
Copper losses are negligible
Eddy losses are totally eliminated
Saving in winding material
Answer
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