Fluid Mechanics MCQs Quiz Multiple Choice Questions & Answers

1. Property of a fluid by which its own molecules are attracted is called

1. adhesion
2. cohesion
3. viscosity
4. compressibility

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

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

3. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

1. adhesion
2. cohesion
3. viscosity
4. compressibility

4. Practical fluids

1. are viscous
2. possess surface tension
3. are compressible
4. possess all the above properties

5. To avoid an interruption in the flow of a syphon, an air vessel is provided

1. at the inlet
2. at the outlet
3. at the summit
4. ay nay point between inlet and outlet

6. Liquids

1. cannot be compressed
2. occupy definite volume
3. are not viscous
4. none of the above

7. Fluid is a substance that

1. cannot be subjected to shear forces
2. always expands until it fills any container
3. has the same shear stress.at a point regardless of its motion
4. cannot remain at rest under action of any shear force

8. The property of a fluid which enables it to resist tensile stress is known as

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

9. Viscosity of water in comparison to mercury is

1. higher
2. lower
3. same
4. higher/lower depending on temperature

10. A fluid is said to be ideal, if it is

1. incompressible
2. inviscous
3. viscous and incompressible
4. inviscous and incompressible

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

21. A fluid in equilibrium cant sustain

1. tensile stress
2. compressive stress
3. shear stress
4. bending stress

22. The volumetric change of the fluid caused by a resistance is known as

1. volumetric strain
2. volumetric index
3. compressibility
4. adhesion