Question

By providing a natural drop in one drop _______________________

(a) the quantity of unbalanced earthwork decreases

(b) the quantity of unbalanced earthwork increases

(c) the quantity of balanced earthwork increases

(d) number of fall increases

The question was posed to me in exam.

The question is from Canal Falls in division Canal Falls of Irrigation Engineering

Answer 1

Correct answer is (b) the quantity of unbalanced earthwork increases

For explanation: The number of fall decreases and the quantity of unbalanced earthwork increases by providing a larger drop in one step. All these factors have to be worked out before deciding the locations and extent of falls.