Environmental Engineering In facultative stabilization pond, the sewage is treated by Algae only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Aerobic bacteria only Algae only Dual action of aerobic bacteria and anaerobic bacteria Sedimentation Aerobic bacteria only ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The main disadvantage of oxidation pond is that Large area is required for construction None of these Maintenance and operation cost are high BOD removal is very low Large area is required for construction None of these Maintenance and operation cost are high BOD removal is very low ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Cleaning is done by (i) Scraping and removal in filters slow sand (ii) Back washing in slow sand filters (iii) Scraping and removal in filters rapid sand (iv) Back washing in rapid sand filters The correct answer is (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (ii) (ii) and (iv) (ii) and (iii) (i) and (iv) (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The alum, when added as a coagulant in water Does not require alkalinity in water for flocculation Decreases pH value of water Increases pH value of water Does not affect pH value of water Does not require alkalinity in water for flocculation Decreases pH value of water Increases pH value of water Does not affect pH value of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Select the correct relationship between porosity (N), specific yield (y) and specific retention (R) N = y + R R = N + y R > (N + y) y = N + R N = y + R R = N + y R > (N + y) y = N + R ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be 10 mm/hr 20 mm/hr 4 mm/hr 40 mm/hr 10 mm/hr 20 mm/hr 4 mm/hr 40 mm/hr ANSWER DOWNLOAD EXAMIANS APP
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