99. A pitot tube is used to measure

A. pressure

B. difference in pressure

C. velocity of flow

D. none of these.

100. If a pitot tube is placed with its nose facing down stream, the liquid

A. does not rise in the tube

B. rises in the tube to a height F?

C. falls in the tube to a depth

D. none of these.

101. 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.

102. 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.

103. Mach number is the ratio of inertia force to

A. viscosity

B. surface tension

C. gravitational force

D. elasticity.

104. Weber number is the ratio of inertia force to

A. surface tension

B. gravitational force

C. elasticity

D. viscosity.

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

A. Reynold number

B. Weber number

C. Pressure coefficient

D. Kinematic viscosity

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