Question

Which of the following is true?

(a) EGL always drops in the direction of c

(b) EGL always rises in the direction of flow

(c) EGL always remains constant in the direction of flow

(d) EGL may or may not in the direction of flow

This question was posed to me in an online quiz.

The doubt is from Hydraulic Gradient and Total Energy Line in section Flow Through Pipes of Fluid Mechanics

Answer 1

The correct option is (a) EGL always drops in the direction of c

Easy explanation: EGL is obtained by plotting total head at various points along the axis of the pipe. Since the total head decreases in the direction of flow, EGL will always drop in that direction.