99.  A pitot tube is used to measure
A. pressure
B. difference in pressure
C. velocity of flow
D. none of these.

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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.

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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.

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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.

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103.  Mach number is the ratio of inertia force to
A. viscosity
B. surface tension
C. gravitational force
D. elasticity.

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104.  Weber number is the ratio of inertia force to
A. surface tension
B. gravitational force
C. elasticity
D. viscosity.

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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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