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Transformers

Transformers
The noise produced by a transformer is termed as

buzz
hum
zoom
ringing

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Transformers
The permissible flux density in case of cold rolled grain oriented steel is around

1.7 Wb/m²
4.7 Wb/m²
3.7 Wb/m²
2.7 Wb/m²

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Transformers
Which of the following acts as a protection against high voltage surges due to lightning and switching?

Conservator
Breather
Thermal overload relays
Horn gaps

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Transformers
Which of the following transformer is smallest?

2kVA, 500 Hz
2kVA, 400 Hz
2kVA, 50 Hz
2kVA, 200 Hz

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Transformers
Sumpner's test is conducted on transformers to determine

stray losses
temperature
None of these
all-day efficiency

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Transformers
The path of the magnetic flux in transformer should have

high resistance
low resistance
high reluctance
low reactance

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MORE MCQ ON Transformers

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