Waste Water Engineering

A. 1 day
B. 2 days
C. 3 days
D. 5 days

A. One hour
B. Two to three hours
C. Three to four hours
D. Six hours

A. 100 cm
B. 110 cm
C. 120 cm
D. 150 cm

A. Invert level of a branch sewer is more than 60 cm that of the main sewer
B. Sewer line runs along a main road
C. Ordinary manhole cannot be built
D. Two sewer lines intersect

A. Carbon dioxide
B. Hydrogen
C. Ammonia
D. All the above

A. House sewers
B. Lateral sewers
C. Branch sewers
D. Main sewers

A. Anaerobic bacteria
B. Aerobic bacteria
C. Both types of bacterias
D. None of these

A. Minimum flow
B. Maximum flow
C. Both A. and B.
D. None of these

A. D8/3 = 4 b8/3
B. D3/8 = 4 b3/8
C. D2/3 = 4 b2/3
D. D3/2 = 4 b3/2

A. The change of gradient
B. The change of direction
C. The junctions of sewers
D. All of these