Mach number is significant in

  • ASupersonics, as with projectiles and jet propulsion
  • BFull immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
  • CSimultaneous motion through two fluids where there is a surface of discontinuity, gravity force, and wave making effects, as with ship's hulls
  • DAll of the above
Correct Answer : (A)

Supersonics, as with projectiles and jet propulsion

Hints :

According to Bernoulli's equation for steady ideal fluid flow


A Francis turbine is used when the available head of water is

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