The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known_____________________?

A. on the surface at which resultant pres-sure acts
B. on the surface at which gravitational force acis
C. at which all hydraulic forces meet
D. similar to metacentre
E. where pressure equivalent to hydraulic thrust will act

A. resistance to shear stress is small
B. fluid pressure is zero
C. linear deformation is small
D. only normal stresses can exist
E. viscosity is nil

A. law of gravitation
B. Archimedes principle
C. principle of buoyancy
D. all of the above
E. continuity equation

A. linearly
B. first slowly and then steeply
C. first steeply and then gradually
D. unpredictable
E. none of the above

A. has constant viscosity
B. has zero viscosity
C. is incompressible
D. is of theoretical interest
E. none of the above