Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Both A & B Neither A nor B Natural aeration of water stream Photosynthetic action of algae Both A & B Neither A nor B Natural aeration of water stream Photosynthetic action of algae ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. 10000 to 100000 1000 to 2000 6000 to 9000 3000 to 6000 10000 to 100000 1000 to 2000 6000 to 9000 3000 to 6000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Corrosion in boilers can be prevented by Enhancing pH of feed water by adding alkali Deaeration of feed water Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion All of these Enhancing pH of feed water by adding alkali Deaeration of feed water Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The principal gas evolved from sludge digestion tank is N₂ CO CH₄ CO₂ N₂ CO CH₄ CO₂ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of potable water should be between 6.5 to 8 13 to 14 4 to 5 1 to 1.5 6.5 to 8 13 to 14 4 to 5 1 to 1.5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Soluble silica present in boiler feed water can be removed by Filtration Anion exchanger Preheating it Coagulation Filtration Anion exchanger Preheating it Coagulation ANSWER DOWNLOAD EXAMIANS APP
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