DGVCL Exam Paper (11-12-2011)
Rated making capacity of a ciruit breaker is equal to

√2 X rated symmetrical breaking capacity
Rated symmetrical breaking capacity
1.11 X rated symmetrical breaking capacity
2.55 X rated symmetrical breaking capacity

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DGVCL Exam Paper (11-12-2011)
The corona effect can be minimized by increasing

The length of the conductor
Spacing between the conductors
Both spacing between the conductors and diameter of the conductor
Diameter of the conductor

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DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

A definite time cuttent characteristic
A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current
An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current
An inverse time current characteristic

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