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Transformers
A transformer will work on
Ac only
Dc only
AC as well as DC
None of the listed here
Ac only
Dc only
AC as well as DC
None of the listed here
Answer
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Transformers
A no-load test is performed on a transformer to determine
efficiency
magnetising current
copper loss
magnetising current and loss
core loss
efficiency
magnetising current
copper loss
magnetising current and loss
core loss
Answer
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Transformers
The all day efficiency of a transformer is ______ the commercial efficiency.
The same as
None of the listed here
Less than
More than
The same as
None of the listed here
Less than
More than
Answer
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Transformers
The primary and secondary windings are wound on the top of each other in order to reduce ______
Leakage reactance
Iron losses
Copper losses
Winding resistance
Leakage reactance
Iron losses
Copper losses
Winding resistance
Answer
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Transformers
How are transformers generally cooled for installations rated at less than 5kVA ?
Water cooled
Oil cooled
None of the listed here
Air cooled
Water cooled
Oil cooled
None of the listed here
Air cooled
Answer
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Transformers
Noise level test in a transformer is a
routine test
None of these
special test
type test
routine test
None of these
special test
type test
Answer
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