Question

______ valves are used to remove sand and silt from the pipelines.

(a) Air relief valve

(b) Sluice valve

(c) Scour valve

(d) Altitude valve

This question was posed to me during an interview for a job.

Enquiry is from Types of Valves in chapter Conveyance and Distribution of Water of Environmental Engineering

Answer 1

The correct choice is (c) Scour valve

To explain I would say: Scour valves are provided to blow off the sand and silt deposited in the pipeline. This operation is done manually.