DGVCL Exam Paper (11-12-2011)
Buchholz relay causes

Tripping for minor faults and alarm for major faults
Tripping for both major and minor faults
Tripping for major faults and alarm for minor faults
Alarm for both major and minor faults

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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)
The motor used in celling fans is

Capacitor start motor
Universal motor
Split phase motor
Capacitor start capacitor run motor

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