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Presence of Corrosive gases like H2S and SO2 affect the voltage drop.(a) True(b) FalseThis question was posed to me at a job interview.The query is from Site Selection for Hydro Electric Power Plants in section Hydro Electric Power Plant of Energy Engineering

Answer»

Right ANSWER is (a) True

The explanation is: Presence of Corrosive gases like H2S and SO2 does affect the VOLTAGE drop at brush contacts in generator leading to poor commutation. SILVER contacts of relays get blackened and lead to HIGH contact resistance and failure of RELAY occurs.


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