Environmental Engineering If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is 1000 1,00,000 4000 4,00,000 1000 1,00,000 4000 4,00,000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sodium permanganate Copper sulphate Lime Sulphuric acid Sodium permanganate Copper sulphate Lime Sulphuric acid 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 (iv) (i) and (iv) (i) and (ii) (ii) and (iii) (ii) and (iv) (i) and (iv) (i) and (ii) (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Turbidity is measured on Standard platinum scale Standard cobalt scale Standard silica scale Platinum cobalt scale Standard platinum scale Standard cobalt scale Standard silica scale Platinum cobalt scale 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 100 ppm 300 ppm 400 ppm 200 ppm 100 ppm 300 ppm 400 ppm 200 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is Larger None of these Same Smaller Larger None of these Same Smaller ANSWER DOWNLOAD EXAMIANS APP
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