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TRANSFORMERS

Transformers
The power transformer is a constant

Current device
Power device
Voltage device
Main flux device

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Transformers
The highest voltage for transmitting electrical power in india is

400 kV
33 kV
132 kV
66 kV

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Transformers
A Buchholz relay can be installed on

Air-cooled transformer
Oil cooled transformer
Auto transformer
Welding transformer

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Transformers
A transformer oil must be free from

Sludge
Moisture
Odour
Gases

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Transformers
In a transformer the resistance between its primary and secondary is

Zero
1 ohm
1000 ohms
Infinite

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