Question

At what angle does the jet deflect after striking a stationery vertical plate?

(a) 30

(b) 60

(c) 90

(d) 0

I have been asked this question in an interview.

This interesting question is from Force Exerted by a Jet on a Stationary Flat Inclined Plate in portion Impact of Jets and Jet Propulsion of Fluid Mechanics

Answer 1

Right option is (c) 90

Explanation: In a stationery vertical plate, the jet after striking the plate will move along the plate. It moves with respect to the angles that are developed with the plate. Hence, after striking the plate it will get deflected at an angle of 90 degrees.