Environmental Engineering in CE Corrosion in boilers can be prevented by Enhancing pH of feed water by adding alkali All of these Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Deaeration of feed water Enhancing pH of feed water by adding alkali All of these Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Deaeration of feed water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it. Coal ash Ortho-xylene Potassium cyanide None of these Coal ash Ortho-xylene Potassium cyanide None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones. 10⁹ 10¹⁵ 10² 10⁵ 10⁹ 10¹⁵ 10² 10⁵ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)? Biological oxidation pond Chemical coagulation Activated carbon adsorption Lagooning Biological oxidation pond Chemical coagulation Activated carbon adsorption Lagooning ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The function of skimming tank in sewage treatment is to remove __________ substances. Dissolved solid Suspended solid Gritty & inorganic Oil & fatty Dissolved solid Suspended solid Gritty & inorganic Oil & fatty ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of lead for public sewer/waste water is about __________ ppm. 150 1 650 25 150 1 650 25 ANSWER DOWNLOAD EXAMIANS APP
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