Environmental Engineering The velocity of flow of water in a sedimentation tank is about 15 to 30 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute 5 to 10 cm/sec 15 to 30 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute 5 to 10 cm/sec ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The effective size of sand particles used in slow sand filters is 0.60 to 1.00 mm 1.00 to 1.80 mm 0.25 to 0.35 mm 0.35 to 0.60 mm 0.60 to 1.00 mm 1.00 to 1.80 mm 0.25 to 0.35 mm 0.35 to 0.60 mm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering On standard silica scale, the turbidity in drinking water should be limited to 20 ppm 50 ppm 10 ppm 30 ppm 20 ppm 50 ppm 10 ppm 30 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period in coagulation tanks is usually kept as 1 to 2 minutes 2 to 6 days 2 to 6 hours 30 to 45 minutes 1 to 2 minutes 2 to 6 days 2 to 6 hours 30 to 45 minutes ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Select the correct relationship between porosity (N), specific yield (y) and specific retention (R) R = N + y N = y + R y = N + R R > (N + y) R = N + y N = y + R y = N + R R > (N + y) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Air binding phenomena in rapid sand filters occur due to Higher turbidity in the effluent Low temperature Excessive negative head Mud ball formation Higher turbidity in the effluent Low temperature Excessive negative head Mud ball formation ANSWER DOWNLOAD EXAMIANS APP
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