A. Domestic sewage
B. Industrial sewage
C. Storm sewage
D. All the above
A. 2 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 8 to 10 mm
A. ratio of inertial force to force due to viscosity
B. ratio of inertial force to force due to gravitation
C. ratio of inertial force to force due to surface tension
D. all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
A. has constant viscosity
B. has zero viscosity
C. is incompressible
D. is of theoretical interest
E. none of the above
A. Are used for carrying sewage and drainage from houses
B. Are manufactured from clays and shale
C. After casting are dried and burnt at temperature 150°C, 700°C and 1200°C
D. All the above
A. Alum
B. Ferric chloride
C. Ferric sulphate
D. Chlorinated copperas
A. Light in weight
B. Not structurally strong to bear large compressive stress
C. Susceptible to corrosion by sulphuric acid
D. All the above