Waste Water Engineering

A. Less than 0.01 mm
B. Less than 0.05 mm
C. Less than 0.1 mm
D. Greater than 0.1 mm

A. The bottom is silted
B. The bottom is scoured
C. Both silting and scouring occur at the bottom
D. Neither silting nor scouring occurs at the bottom

A. 2 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 8 to 10 mm

A. 10 litres
B. 15 litres
C. 20 litres
D. 25 litres

A. Is only provided
B. Is doubled
C. Is trebled
D. Is not enough

A. 0.05 m/sec
B. 0.09 m/sec
C. 1.25 m/sec
D. None of these

A. Domestic sewage
B. Industrial sewage
C. Storm sewage
D. All the above

A. Horizontally
B. Vertically
C. At an angle of 30°
D. At an angle of 60°

A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours

A. 50 mg/l
B. 100 mg/l
C. 150 mg/l
D. 250 mg/l