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

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

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

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

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