Environmental Engineering in CE Scale formation in boiler is controlled by Preheating of feed water Reduction in hardness, silica & alumina in feed water Keeping the pH value of feed water just below 7 Eliminating H₂S in feed water Preheating of feed water Reduction in hardness, silica & alumina in feed water Keeping the pH value of feed water just below 7 Eliminating H₂S in feed water 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). 4.8 1.2 0.002 0.2 4.8 1.2 0.002 0.2 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of iron and manganese in water causes Discoloration of bathroom fixtures None of these Reduction in its dissolved oxygen content Temporary hardness Discoloration of bathroom fixtures None of these Reduction in its dissolved oxygen content Temporary hardness ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? Bag filter Hollow wet scrubber Dust catcher (gravity type) Cyclone separator Bag filter Hollow wet scrubber Dust catcher (gravity type) Cyclone separator ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels. 120 150 180 90 120 150 180 90 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of excess flourine in water causes Fluorosis Dental cavity Tooth decay Respiratory disease Fluorosis Dental cavity Tooth decay Respiratory disease ANSWER DOWNLOAD EXAMIANS APP
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