Question

During an oscillating jump, the value of Froude lies in between________

(a) 1 to 2.5

(b) 2.5 to 4.5

(c) Less than 1

(d) Zero

I have been asked this question in an interview.

The query is from Force Exerted by a Jet on a Stationary Flat Inclined Plate topic in section Impact of Jets and Jet Propulsion of Fluid Mechanics

Answer 1

Correct option is (a) 1 to 2.5

Explanation: An oscillating jump is a jump that takes place when the Froude’s number is in between 2.5 to 4.5. During this jump, the jet water at the entrance of the jump fluctuates. It fluctuates from the bottom of the channel to the top of the channel.