Fluid Mechanics Multiple Choice Questions and Answers

11. The vapour pressure over the concave surface is

1. less man the vapour pressure over the plane surface
2. equal to the vapour pressure over the plane surface
3. greater than the vapour pressure over the plane surface
4. zero

12. The pressure at a point in a fluid will not be same in all the directions when the fluid is

1. moving
2. viscous and moving
3. viscous and static
4. inviscous and moving

13. An ideal flow of any fluid must fulfill the following

1. Newtons law of motion
2. Newtons law of viscosity
3. Pascal law
4. Continuity equation

14. Which of the following is the unit of kinematic viscosity

1. pascal
2. poise
3. stoke
4. faraday

15. Fluid is a substance which offers no resistance to change of

1. pressure
2. flow
3. shape
4. volume

16. Kinematic viscosity is dependent upon

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

17. For very great pressures, viscosity of moss gases and liquids

1. remains same
2. increases
3. decreases
4. shows erratic behavior

18. In a static fluid

1. resistance to shear stress is small
2. fluid pressure is zero
3. linear deformation is small
4. only normal stresses can exist

19. Free surface of a liquid tends to contract to the smallest possible area due to force of

1. surface tension
2. viscosity
3. friction
4. cohesion

20. The property by virtue of which a liquid opposes relative motion between its different layers is called

1. surface tension
2. co-efficient of viscosity
3. viscosity
4. osmosis