DGVCL Exam Paper (12-06-2016)
In a transformer the energy is conveyed from primary to secondary

Through air
Through cooling coil
By the flux
None of these

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DGVCL Exam Paper (12-06-2016)
What will happen if the primary of a transformer is connected to DC supply?

Transformer may start to smoke and burn
Transformer will operate with high efficiency
Transformer will operate with low efficiency
No effect

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DGVCL Exam Paper (12-06-2016)
An Auto-transformer (which has only one winding) may be used as a ______ .

Step-Down Transformer
Both Step-Up and Step-Down transformer
Step-Up Transformer
None of these

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