In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is____________________?

A. Stone ware pipes
B. Earthenware pipes
C. C.I. pipes
D. G.I. pipes

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. 5 cm
B. 10 cm
C. 15 cm
D. 20 cm

A. Main sewer
B. Outfall sewer
C. Branch sewer
D. House sewer