Fluid Mechanics

91. Increase in pressure at the outer edge of a drum of radius R due to rotation at corad/sec, full of liquid of density p will be

1. pco2/?2
2. pco2/?2/2
3. 2pa2R2
4. pa2R/2
5. none of the above.

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92. Kinematic viscosity is dependent upon

1. pressure
2. distance
3. level
4. flow
5. density.

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93. Kinematic viscosity is equal to

1. dynamic viscosity/density
2. dynamicviscosity x density
3. density/dynamic viscosity
4. 1/dynamicviscosity x density
5. same as dynamic viscosity.

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94. Liquids

1. cannot be compressed
2. occupy definite volume
3. are not affected by change in pressure and temperature
4. are not viscous
5. none of the above.

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95. Liquids transmit pressure equally in all the directions. This is according to

1. Boyle's law
2. Archimedes principle
3. Pascal's law
4. Newton's formula
5. Chezy's equation.

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96. Mach number is significant in

1. supersonics, as with projectiles and jet propulsion
2. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
3. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship's hulls
4. all of fhe above
5. none of the above.

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97. Manometer is used to measure

1. pressure in pipes, channels etc.
2. atmospheric pressure
3. very low pressure
4. difference of pressure between two points
5. velocity.

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98. Mercury does not wet glass. This is due to property of liquid known as

1. adhesion
2. cohesion
3. surface tension
4. viscosity
5. compressibility.

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99. Metacentre is the point of intersection of

1. vertical upward force through e.g. of body and center line of body
2. buoyant force and the center line of body
3. mid point between e.g. and center of buoyancy
4. all of the above
5. none of the above.

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100. Metacentric height is given as the distance between

1. the center of gravity of the body and the meta center
2. the center of gravity of the body and the center of buoyancy
3. the center of gravity of the body and the center of pressure
4. center of buoyancy and metacentre
5. none of the above.

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