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Transformers

Transformers
Which of the following is not a part of transformer installation?

Conservator
Exciter
Breather
Buchholz relay

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Transformers
The open circuit test on a transformer gives _______

Total losses
Friction losses
Copper losses
Iron losses

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Transformers
In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

111.5 W
1,020 W
14.1 W
0 W

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Transformers
The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns?

210
900
450
350

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Transformers
The noise produced by a transformer is termed as

zoom
hum
ringing
buzz

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Transformers
The steel used for transformer core has

All of the listed here
High silicon content
High permeability
Low hysteresis loss

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