GETCO Exam Paper (11-06-2017)
The stability of arc in vacuum depends on

the contact material and its vapour pressure
the circuit parameters only
the contact material only
the contact material with its vapour presssure and the circuit parameters

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GETCO Exam Paper (11-06-2017)
In a super heater

pressure rises and temperature remains the same
temperature rises and pressure drops
temprature rises and pressure remains unchanged
pressure rises and temperature drops

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