Question

Connecting pipe should be _______ mm minimum diameter.

(a) 60

(b) 300

(c) 700

(d) 100

This question was addressed to me in an online quiz.

My question comes from Design of Septic Tanks in section Road Estimating, Sanitary and Water Supply Work of Civil Engineering Drawing

Answer 1

The correct answer is (a) 60

To explain: It may be of R.C.C, Hume pipe, cast iron pipe, S.W. Inlet and outlet may be made through T-junction pipe or baffle wall of precast R.C.C. may be provided at a distance 1/5 of length of the septic tank so that the inlet sewage may not disturb the working of the tank.