Environmental Engineering in CE Corrosion in boilers can be prevented by Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Enhancing pH of feed water by adding alkali Deaeration of feed water All of these Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion Enhancing pH of feed water by adding alkali Deaeration of feed water All of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Oil and grease present in an emulsified state in waste water discharged from industries can be removed by Skimming off Chlorination Biological oxidation Settling out using chemical reagents Skimming off Chlorination Biological oxidation Settling out using chemical reagents ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). 0.002 0.2 1.2 4.8 0.002 0.2 1.2 4.8 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of dissolved impurities of __________ is responsible for the red brownish color of water. Arsenic Carbonates Iron & manganese Bi-carbonates Arsenic Carbonates Iron & manganese Bi-carbonates ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of soluble organics in polluted water causes Explosion hazards Undesirable plants growth Depletion of oxygen Fire hazards Explosion hazards Undesirable plants growth Depletion of oxygen Fire hazards ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of oxidised sewage is about 13.4 1.8 7.3 6.2 13.4 1.8 7.3 6.2 ANSWER DOWNLOAD EXAMIANS APP
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