Fluid Mechanics

91. 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.

View answer

92. 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.

View answer

93. 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.

View answer

94. 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.

View answer

95. 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.

View answer

96. Mercury is often used in barometer because

1. it is the best liquid
2. the height of barometer will be less
3. its vapour pressure is so low that it may be neglected
4. both (b) and (c)
5. it moves easily.

View answer

97. 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.

View answer

98. 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.

View answer

99. 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.

View answer

100. 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.

View answer