Environmental Engineering The rate of Alteration of pressure filters is Less than that of slow sand filters Greater than that of rapid sand filters In between the filtration rate of slow sand filters and rapid sand filters Equal to that of slow sand filters Less than that of slow sand filters Greater than that of rapid sand filters In between the filtration rate of slow sand filters and rapid sand filters Equal to that of slow sand filters ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Air binding phenomena in rapid sand filters occur due to Excessive negative head Mud ball formation Higher turbidity in the effluent Low temperature Excessive negative head Mud ball formation Higher turbidity in the effluent Low temperature ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Ground water is usually free from Suspended impurities None of these Both suspended and dissolved impurities Dissolved impurities Suspended impurities None of these Both suspended and dissolved impurities Dissolved impurities ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Septic tank is a (i) Settling tank (ii) Digestion tank (iii) Aeration tank Only (i) (i) and (iii) (i) and (ii) Only (iii) Only (i) (i) and (iii) (i) and (ii) Only (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Period of cleaning of slow sand filters is about 24 - 48 hours 1 - 2 year 10 - 12 days 2 - 3 months 24 - 48 hours 1 - 2 year 10 - 12 days 2 - 3 months ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Disinfection efficiency is Increased at higher pH value of water Reduced at higher pH value of water Unaffected by pH value of water Highest at pH value equal to 7 Increased at higher pH value of water Reduced at higher pH value of water Unaffected by pH value of water Highest at pH value equal to 7 ANSWER DOWNLOAD EXAMIANS APP
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