Question

1. Consider the following statements regarding a hydraulic jump:
1. There occurs a transformation of super critical flow to sub-critical
flow.
2. The flow is uniform and pressure distribution is due to hydrostatic
force before and after the jump.
3. There occurs a loss of energy due to eddy formation and turbulence.
Which of these statements are correct?
(a) 1, 2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3​

Answer 1

Hydraulic Jump

Answer:

Option C is the correct statement.

(c) 2 and 3

Explanation:

Hydraulic Jump

When the flow becomes unstable, a hydraulic jump is a phenomenon that happens in fast-moving open flows. The height of the liquid surface increases suddenly when a leap happens, resulting in an increased depth and reduced downstream average flow velocity.

• It occurs due to

As water discharges into a low-speed zone at high velocity, a hydraulic jump is made, resulting in an abrupt rise in the local water depth.

Examples

• Flow of rivers
• Dam spillways