Question

A narrow V-shaped valley indicates the choice of _________________

(a) concrete overflow dam

(b) spillway

(c) arch dam

(d) earth dam

This question was posed to me in a job interview.

Question is taken from Factors Governing the Selection of a Particular Type of Dam topic in division General and Particular Dams of Irrigation Engineering

Answer 1

Correct answer is (c) arch dam

The best I can explain: The choice of an arch dam is suggested for a narrow V-shaped valley. A separate site for the spillway must also be available and it is generally preferred to have the top width of the valley less than 1/4 of its height.