Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 8.5 to 10.0 6.5 to 8.0 10.5 to 12.0 4.5 to 6.0 8.5 to 10.0 6.5 to 8.0 10.5 to 12.0 4.5 to 6.0 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 (iii) (ii) and (iv) (i) and (iv) (i) and (ii) (ii) and (iii) (ii) and (iv) (i) and (iv) (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve, which is provided on the suction pipe in a tube-well, is Pressure relief valve Reflux valve Air relief valve Sluice valve Pressure relief valve Reflux valve Air relief valve Sluice valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In facultative stabilization pond, the sewage is treated by Dual action of aerobic bacteria and anaerobic bacteria Algae only Sedimentation Aerobic bacteria only Dual action of aerobic bacteria and anaerobic bacteria Algae only Sedimentation Aerobic bacteria only ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if The surface area of tank is increased Particle size is decreased The depth of tank is decreased None of these The surface area of tank is increased Particle size is decreased The depth of tank is decreased None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Turbidity is measured on Platinum cobalt scale Standard cobalt scale Standard platinum scale Standard silica scale Platinum cobalt scale Standard cobalt scale Standard platinum scale Standard silica scale ANSWER DOWNLOAD EXAMIANS APP
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