Environmental Engineering in CE The permissible color for domestic water supply is __________ ppm. 100 20 1 1000 100 20 1 1000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of dissolved impurities of __________ is responsible for the red brownish color of water. Bi-carbonates Arsenic Carbonates Iron & manganese Bi-carbonates Arsenic Carbonates Iron & manganese ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Scale formation in boiler is controlled by Eliminating H₂S in feed water Keeping the pH value of feed water just below 7 Preheating of feed water Reduction in hardness, silica & alumina in feed water Eliminating H₂S in feed water Keeping the pH value of feed water just below 7 Preheating of feed water Reduction in hardness, silica & alumina in feed water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 50 5000 2000 1000 50 5000 2000 1000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell. 0.01 0.1 4 1 0.01 0.1 4 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In a sedimentation tank, the detention period for water ranges from __________ hours. 8 to 12 2 to 4 16 to 20 24 to 32 8 to 12 2 to 4 16 to 20 24 to 32 ANSWER DOWNLOAD EXAMIANS APP
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