Question

Which of the following types of pressure conduits is preferably used for large heads?

(a) PCC pipes

(b) Cast iron pipes

(c) Pre-stressed concrete pipes

(d) Asbestos pipes

The question was posed to me in class test.

This intriguing question comes from Pressure Conduites in chapter Pressure Conduits, Outlet Works through Dams and Rivers of Irrigation Engineering

Answer 1

Right option is (c) Pre-stressed concrete pipes

To explain I would say: Pre-stressed concrete pipes have more strength than RCC pipes and are more economical. The strength can be achieved by circumferential pre-stressing so as to increase the tensile stress. The main advantage is that they offer a cost advantage over other pipes for large diameter and higher pressures.