DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto

25 % of its full length
80 % of its full length
50 % of its full length
Its full length

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Portion of the conductor near the surface carries less current and the core of the conductor carries more current
Current flows through the half cross section of the conductor
Portion of the conductor near the surface carries more current and the core of the conductor carries less current
Uniform current flows through the conductor

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

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

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DGVCL Exam Paper (11-12-2011)
A Mho relay is a

Voltage restrained directional relay
Voltage controlled over current relay
Directional restrained over current relay
Directional restrained over voltage relay

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