DGVCL Exam Paper (12-06-2016)
Increasing the number of turns of wire on the secondary of a transformer will

Decrease the secondary current
Have no effect on the secondary current
Increase the secondary current
Increase the primary current

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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 x Peak load for the same period
Load facto r= Average load for a period/Peak load for the same period
Load factor = 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 :

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

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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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