Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 1000 5000 50 2000 1000 5000 50 2000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE COD of raw municipal sewage may be in the range of about __________ mg/litre. 1500-2500 90-120 1-2 5-10 1500-2500 90-120 1-2 5-10 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 5-200 μm size particles are called Dust Powder Colloids or aerosols Smoke Dust Powder Colloids or aerosols Smoke ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent. 92 84 80 88 92 84 80 88 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Deaeration of high pressure boiler feed water is done to reduce Its silica content Caustic embrittlement Foaming from boilers Its dissolved oxygen content Its silica content Caustic embrittlement Foaming from boilers Its dissolved oxygen content ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The earth's atmosphere is an envelope of gases present upto a height of about __________ kms. 1000 200 10 2000 1000 200 10 2000 ANSWER DOWNLOAD EXAMIANS APP
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