Waste Water Engineering 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is 300 mg/l 200 mg/l 400 mg/l 100 mg/l 300 mg/l 200 mg/l 400 mg/l 100 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is 1.065 1.075 1.095 1.085 1.065 1.075 1.095 1.085 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a grit chamber of a sewage treatment plant, One minute of detention period is kept All of these Depth of 0.9 m to 1.20 m is kept Flow velocity 0.15 m to 0.3 m/sec is kept One minute of detention period is kept All of these Depth of 0.9 m to 1.20 m is kept Flow velocity 0.15 m to 0.3 m/sec is kept ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is 313.5 cm/sec 500 cm/sec 213.5 cm/sec 413.5 cm/sec 313.5 cm/sec 500 cm/sec 213.5 cm/sec 413.5 cm/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Aerobic bacterias Consume organic matter as their food Oxidise organic matter in sewage Flourish in the presence of free oxygen All of these Consume organic matter as their food Oxidise organic matter in sewage Flourish in the presence of free oxygen All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is 30 minutes 1 hour and 30 minutes 2 hours 1 hour 30 minutes 1 hour and 30 minutes 2 hours 1 hour ANSWER DOWNLOAD EXAMIANS APP
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