Question

The proportionality of APM was sacrificed to enable the outlet to carry higher silt charge by increasing the setting to 8/10.

(a) True

(b) False

This question was addressed to me during a job interview.

The origin of the question is Regulation Modules in chapter Regulation Modules and Canal Structure of Irrigation Engineering

Answer 1

Right answer is (a) True

Easiest explanation: The APM (Adjustable Proportional Module) has a setting of 6/10 which is aimed at exact proportionality. But the channels using such module silted very badly and hence, the setting was increased to 8/10 to enable the outlet to carry higher silt charge. The outlet is then known as A.O.S.M.