Environmental Engineering The specific gravity of sewage is Much greater than 1 Slightly less than 1 Equal to 1 Slightly greater than 1 Much greater than 1 Slightly less than 1 Equal to 1 Slightly greater than 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Disinfection efficiency is Increased at higher pH value of water Unaffected by pH value of water Highest at pH value equal to 7 Reduced at higher pH value of water Increased at higher pH value of water Unaffected by pH value of water Highest at pH value equal to 7 Reduced at higher pH value of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of filtered water, which is used for backwashing in rapid sand filters, is about 5 to 7 2 to 4 0.2 to 0.4 0.4 to 1.0 5 to 7 2 to 4 0.2 to 0.4 0.4 to 1.0 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 Larger Same None of these Smaller Larger Same None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be 400 ppm 200 ppm 300 ppm 100 ppm 400 ppm 200 ppm 300 ppm 100 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Alum as a coagulant is found to be most effective when pH range of water is 8 to 10 6 to 8 2 to 4 4 to 6 8 to 10 6 to 8 2 to 4 4 to 6 ANSWER DOWNLOAD EXAMIANS APP
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