Waste Water Engineering
Hydraulic mean radius is

Difference in heads between two points in circular pipes
Mean radius of sewer
Mean of radii in a pipe line of varying cross -sections
Cross-sectional area/wetted perimeter

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
The sewer pipes

Should resist the wear and tear caused due to abrasion
Are designed for generating self-cleansing velocities at different discharge
All listed here
Carry sewage as gravity conduits

ANSWER DOWNLOAD EXAMIANS APP