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Water containing H2S, CO2 and CH2 are less corrosive to dam structure.

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Water containing H2S, CO2 and CH2 are less corrosive to dam structure.

(a) True

(b) False

This question was posed to me during an online interview.

The above asked question is from Site Selection for Hydro Electric Power Plants in portion Hydro Electric Power Plant of Energy Engineering

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The correct answer is (b) False

For explanation: Water containing H2S, CO2 and CH2 are highly corrosive to dam structure. H2SO4 formed by oxidation of H2S attack the cement and disintegrate the concrete. These gases increase the solubility of soil and rocks. Structures, metallic piping and penstock are also affected.

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