In an oil circuit breaker, due to heat the oil decomposes and the gases are liberated. Which of the following gas is usually NOT liberated in this process?

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Question

This question was previously asked in

HPCL Engineer Electrical 11 Aug 2021 Official Paper

Answer 1

Oil circuit breaker:

Oil circuit breaker is such type of circuit breaker which used oil as a dielectric or insulating medium for arc extinction.
In oil circuit breaker the contacts of the breaker are made to separate within an insulating oil.
When the fault occurs in the system, the contacts of the circuit breaker are open under the insulating oil, and an arc is developed between them and the heat of the arc is evaporated in the surrounding oil.
Due to the heat of the arc gases such as acetylene, methane and hydrogen are liberated into the atmosphere.
Among the following options, ammonia gas is not liberated during decomposition of oil.