Question

Which of the following is not a type of rigid module?

(a) Gibb’s module

(b) Khanna’s rigid module

(c) Foote module

(d) Crump’s proportional module

I had been asked this question during an interview.

I'm obligated to ask this question of Types of Rigid Modules and Cattle Crossings in section Regulation Modules and Canal Structure of Irrigation Engineering

Answer 1

The correct choice is (d) Crump’s proportional module

Easy explanation: Crump’s Adjustable Proportional Module is also called Adjustable Orifice Semi-Module. In this type, a cast-iron roof block is provided at the entrance end which is screwed to the masonry entrance by the bolts fixed in the masonry. This block is given the lemniscate curve at the lower end on the entrance side.