# Froudes Number - applicable in open hydraulic structure - Fluid Mechanics

**Q. Which of the following number is applicable in open hydraulic structure such as spillways, where gravitational force is predominant?***- Published on 05 Aug 15***a.** Reynold's Number

**b.** Euler's Number

**c.** Weber's Number

**d.** Froude's Number

**ANSWER: Froude's Number**