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Transformers

Transformers
A transformer oil must be free from

Odour
Sludge
Gases
Moisture

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Transformers
Losses which occur in rotating electric machines and do not occur in trans formers are

magnetic losses
friction and windage losses
hysteresis and eddy current losses
copper losses

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Transformers
An open-circuit test on a transformer is conducted primarily to measure

insulation resistance
total loss
core loss
copper loss

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Transformers
Negative voltage regulation is indicative that the load is

inductive only
None of these
capacitive only
inductive or resistive

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Transformers
By laminating the core of a transformer, we decrease _____

Copper loss
Eddy current loss
Hysteresis loss
Leakage reactance

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Transformers
The primary and secondary windings are wound on the top of each other in order to reduce ______

Leakage reactance
Winding resistance
Copper losses
Iron losses

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