Environmental Engineering Standard BOD is measured at 25°C - 3 day 20°C - 5 day 30°C - 5 day 20°C - 1 day 25°C - 3 day 20°C - 5 day 30°C - 5 day 20°C - 1 day ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum efficiency of BOD removal is achieved in Trickling filters Oxidation pond Oxidation ditch Aerated lagoons Trickling filters Oxidation pond Oxidation ditch Aerated lagoons ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is Smaller None of these Same Larger Smaller None of these Same Larger ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of chlorine in fresh bleaching powder is about 20 to 25 30 to 35 10 to 15 40 to 50 20 to 25 30 to 35 10 to 15 40 to 50 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In lime-soda process Only carbonate hardness is removed Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Only noncarbonated hardness is removed Only carbonate hardness is removed Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Only noncarbonated hardness is removed ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the Turbidity in water Hardness in water Dissolved oxygen in water Residual chlorine in water Turbidity in water Hardness in water Dissolved oxygen in water Residual chlorine in water ANSWER DOWNLOAD EXAMIANS APP
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