Question

Which of the following is also known as a check valve?

(a) Scour valve

(b) Pressure relief valve

(c) Altitude valve

(d) Reflux valve

This question was addressed to me in unit test.

I need to ask this question from Types of Valves topic in section Conveyance and Distribution of Water of Environmental Engineering

Answer 1

Correct option is (d) Reflux valve

Easiest explanation: Reflux valve is known as non-return valve or check valve. They are placed in water pipes which obtain water directly from the pumps.