Fluid Mechanics

101. Metacentric height is the distance between the metacentre and

1. water surface
2. center of pressure
3. center of gravity
4. center of buoyancy
5. none of the above.

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102. Newton's law of viscosity is a relationship between

1. shear stress anctthejiate of angular distortion
2. shear stress and viscosity
3. shear stress, velocity and viscosity
4. pressure, velocity and viscosity
5. shear stress, pressure and rate of angular distortion.

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103. Non uniform flow occurs when

1. the direction and magnitude of the velocity at all points are identical
2. the velocity of successive fluid particles, at any point, is the same at successive periods of time
3. the magnitude aricf direction of the velocity do not change from point to point in the fluid
4. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
5. velocity, depth, pressure, etc. change from point to point in the fluid flow.

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104. Normal depth in open channel flow is the depth of flow corresponding to

1. steady flow
2. unsteady flow
3. laminar flow
4. uniform flow
5. critical flow.

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105. Operation of McLeod gauge used for low pressure measurement is based on the principle of

1. gas law
2. Boyle's law
3. Charle's law
4. Pascal's law
5. McLeod's law.

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106. ow of water in a pipe about 3 metres in diameter can be measured by

1. orifice plate
2. venturi
3. rotameter
4. pitot tube
5. nozzle

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107. Piezometer is used to measure

1. pressure in pipe, channels etc.
2. atmospheric pressure
3. very low pressures
4. difference of pressure between two points
5. flow.

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108. Pitot tube is used for measurement of

1. pressure
2. flow
3. velocity
4. dsscharge
5. viscosity.

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109. Poise is the unit of

1. surface tension
2. capillarity
3. viscosity
4. shear stress in fluids
5. buoyancy.

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110. Practical fluids

1. are viscous
2. possess surface tension
3. are compressible
4. possess all the above properties
5. possess none of the above properties.

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