DGVCL Exam Paper (12-06-2016)
The following is/are the characteristics of SF₆ circuit breakers:

All of these
It does not need an auxiliary breaking chamber
Short break time of 2 to 2.5 cycles
None of these

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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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DGVCL Exam Paper (12-06-2016)
A Step Up transformer :

Steps down the level of current
Step up the level of Frequency
Steps up the level of Voltage
(a) and (b) only

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