Question

The Froude number of a hydraulic jump is 5.5. The jump can be classified as a/an

• A. oscillating jump
• B. steady jump
• C. undular jump
• D. weak jump

Answer 1

The correct option is B steady jump

The hydraulic jumps in horizontal rectangular channels are classified into five categories based on Froude number $F_1$ of the supercritical flow as:

Range Type

$1.0<F_1\le 1.7$ Undular jump

$1.7<F_1\le 2.5$ Weak jump

$2.5<F_1\le 4.5$ Oscillating jump

$4.5<F_1\le 9.0$ Steady jump

$F_1>9.0$ Strong or choppy jump