Question

Jet propulsion of ship in a very shallow water is needed to_________

(a) Avoid sinking of the ship

(b) Avoid damage of the propeller

(c) Avoid current directions

(d) Avoid surface damage

This question was posed to me in an interview.

This intriguing question comes from Force Exerted by a Jet on a Series of Vanes in section Impact of Jets and Jet Propulsion of Fluid Mechanics

Answer 1

Right choice is (b) Avoid damage of the propeller

Explanation: Jet propulsion of ship in a very shallow water is needed to avoid damage of the propeller. Jet propulsion of ship is less efficient than screw propeller due to large amount of frictional losses developed in the pump and the pipeline.