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TRANSFORMERS

Transformers
The power transformer is a constant

Main flux device
Current device
Voltage device
Power device

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Transformers
The highest voltage for transmitting electrical power in india is

132 kV
33 kV
66 kV
400 kV

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Transformers
A Buchholz relay can be installed on

Welding transformer
Oil cooled transformer
Air-cooled transformer
Auto transformer

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Transformers
A transformer oil must be free from

Sludge
Moisture
Gases
Odour

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

Zero
1 ohm
Infinite
1000 ohms

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