267. The ratio of the inertia and viscous forces acting in any flow, ignoring other forces, is called

A. Euler number

B. Frode number

C. Reynold number

D. Weber number

268. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

A. Euler number

B. Frode number

C. Reynold number

D. Weber number.

269. Mach number is the ratio of inertia force to

A. viscosity

B. surface tension

C. gravitational force

D. elasticity.

270. Weber number is the ratio of inertia force to

A. surface tension

B. gravitational force

C. elasticity

D. viscosity.

271. The dimensionless parameter not applicable to flowing liquids, is

A. Reynold number

B. Weber number

C. Pressure coefficient

D. Kinematic viscosity.

272. For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is

A. Froude number

B. Weber number

C. Reynold number

D. Mach number.

273. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing

A. Reynold number

B. Froude number.

C. Weber number

D. Mach number.

Page **39** of **61**