Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sodium permanganate Lime Copper sulphate Sulphuric acid Sodium permanganate Lime Copper sulphate Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The minimum and maximum diameters of sewers shall preferably be 15 cm and 100 cm 30 cm and 450 cm 60 cm and 300 cm 15 cm and 300 cm 15 cm and 100 cm 30 cm and 450 cm 60 cm and 300 cm 15 cm and 300 cm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of filtration in slow sand filters in million litres per day per hectare is about 100 to 150 1400 to 1500 500 to 600 50 to 60 100 to 150 1400 to 1500 500 to 600 50 to 60 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water Only (iii) Only (i) Both (i) and (ii) Both (i) and (iii) Only (iii) Only (i) Both (i) and (ii) Both (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following retards the self purification of stream? Higher temperature None of these Satisfying oxygen demand Sunlight Higher temperature None of these Satisfying oxygen demand Sunlight ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to geometrical increase method of forecasting population, arithmetical increase method gives Lesser value Higher value Accurate value Same value Lesser value Higher value Accurate value Same value ANSWER DOWNLOAD EXAMIANS APP
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