Environmental Engineering The alum, when added as a coagulant in water Does not affect pH value of water Increases pH value of water Decreases pH value of water Does not require alkalinity in water for flocculation Does not affect pH value of water Increases pH value of water Decreases pH value of water Does not require alkalinity in water for flocculation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The specific gravity of sewage is Slightly less than 1 Slightly greater than 1 Much greater than 1 Equal to 1 Slightly less than 1 Slightly greater than 1 Much greater than 1 Equal to 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The minimum and maximum diameters of sewers shall preferably be 30 cm and 450 cm 15 cm and 300 cm 15 cm and 100 cm 60 cm and 300 cm 30 cm and 450 cm 15 cm and 300 cm 15 cm and 100 cm 60 cm and 300 cm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is 40 ppm 1 ppm 4 ppm 10 ppm 40 ppm 1 ppm 4 ppm 10 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering A sewer that receives the discharge of a number of house sewers is called House sewer Intercepting sewer Sub-main sewer Lateral sewer House sewer Intercepting sewer Sub-main sewer Lateral sewer ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to rapid sand filters, slow sand filters give (i) Slower filtration rate (ii) Higher filtration rate (iii) Lesser efficiency in removal of bacteria (iv) Higher efficiency in removal of bacteria The correct answer is (ii) and (iii) (ii) and (iv) (i) and (ii) (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (ii) (i) and (iv) ANSWER DOWNLOAD EXAMIANS APP
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