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
None of these
Short break time of 2 to 2.5 cycles

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DGVCL Exam Paper (12-06-2016)
The following formula is correct:

All of these
Load factor = Average load for a period + Peak load for the same period
Load factor = Average load for a period x Peak load for the same period
Load facto r= Average load for a period/Peak load for the same period

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

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

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