Waste Water Engineering

A. 100 mm dia.
B. 150 mm dia.
C. 225 mm dia.
D. All of these

A. D’ = 0.64 D
B. D’ = 0.74 D
C. D’ = 0.84 D
D. D’ = 0.94 D

A. The shape is rectangular
B. Detention period is 2 hours
C. The velocity of flow is restricted to 0.30 m/minute
D. All the above

A. 3 m
B. 3.5 m
C. 4 m
D. 4.5 m

A. Weight of the pipe
B. Weight of the back fill
C. Superimposed traffic loads
D. All the above

A. Ammonia and nitrogen
B. Nitrogen and organic nitrogen
C. Organic nitrogen and ammonia
D. All the above

A. Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen
B. Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates
C. Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia
D. Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates

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

A. The materials separated by screens, is called screenings
B. The screenings are disposed off either by burning or by burial or by dumping
C. The process of burning the screenings, is known as compositing
D. All the above

A. One pipe
B. Two pipes
C. Three pipes
D. Four pipes