Question

On which of the factors does the co-efficent of bend in a pipe depend?

(a) angle of bend and radius of curvature of the bend

(b) angle of bend and radius of the pipe

(c) radius of curvature of the bend and pipe

(d) radius of curvature of the bend and pipe and angle of bend

I have been asked this question during an interview.

My doubt is from Loss of Energy in Pipes in portion Flow Through Pipes of Fluid Mechanics

Answer 1

The correct choice is (d) radius of curvature of the bend and pipe and angle of bend

To explain I would say: The co-efficent of bend in a pipe depends on all the three parameters – radius of curvature of the bend, diameter (radius) of the pipe and angle of bend.