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Transformers

Transformers
Power transformers are generally designed to have maximum efficiency around

near full-load
half-load
no-load
10% overload

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Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

5
0.2
0.4
25

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Transformers
Sumpner's test is conducted on transformers to determine

None of these
temperature
stray losses
all-day efficiency

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Transformers
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?

0.9 V
900 V
90 V
9 V

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Transformers
The dielectric strength of transformer oil is expected to be

100 kV
lkV
33 kV
330 kV

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Transformers
The efficiencies of transformers compared with that of electric motors of the same power are

about the same
much smaller
somewhat smaller
much higher

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MORE MCQ ON Transformers

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