Question

Corrosion of tubewell pipes may cause _______________

(a) reduced discharge from the tubewell

(b) excessive discharge of sand with water

(c) discharge of highly alkaline water

(d) increased pumping rate

I had been asked this question in an interview for internship.

My question is based upon Tube Well-2 topic in section Ground Water for Irrigation through Wells and Tubewells of Irrigation Engineering

Answer 1

The correct answer is (b) excessive discharge of sand with water

Best explanation: Due to the action of acidic water on the pipe, it is gradually destroyed by corrosion. The aquifer sand surrounding the well pipe comes out through the worn-out pipe walls bringing sand along with water. It results in the excessive withdrawal of sand along with the well water.