The most effective arrangement for diverting excess storm water into a natural drainage, is____________________?

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

A. Inverted syphon
B. Depressed sewer
C. Sag pipe
D. all of these

A. 1.39 m
B. 1.49 m
C. 1.59 m
D. 1.69 m

A. Q = [(4 + )/(18 + )] q
B. Q = [(18 + P)/(4 + )] q
C. Q = [(18 + )/(4 + )] q
D. Q = [(5 + )/((15 + )] q