McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering , Mechanical Engineering .
Chapters
| 1. |
The branch of Engineering-science, which deals with water at rest or in motion is called |
| A. | hydraulics |
| B. | Fluid mechanics |
| C. | Applied mechanics |
| D. | Kinematics. |
| Answer» A. hydraulics | |
| 2. |
A solid can resist which of the following stresses? |
| A. | Tensile |
| B. | Compressive |
| C. | Shear |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 3. |
.......... possesses no definite volume and is compressible. |
| A. | Solid |
| B. | Liquid |
| C. | Gas |
| D. | Vapour. |
| Answer» C. Gas | |
| 4. |
The ratio of the specific weight of the liquid to the specific weight of a standard fluid is known as |
| A. | Specific volume |
| B. | Weight density |
| C. | Specific gravity |
| D. | Viscosity. |
| Answer» C. Specific gravity | |
| 5. |
The property of a fluid which determines its resistance to shearing stress is called |
| A. | Viscosity |
| B. | Surface tension |
| C. | Compressibility |
| D. | None of the above. |
| Answer» A. Viscosity | |
| 6. |
Fluids which do not follow the linear relationship between shear stress and rate of deformation are termed as.... fluids. |
| A. | Newtonian |
| B. | Non-Newtonian |
| C. | Dilatant |
| D. | ideal |
| Answer» B. Non-Newtonian | |
| 7. |
The printer’s ink is an example of |
| A. | Newtonian fluid |
| B. | Non-Newtonian |
| C. | Thixotropic substance |
| D. | Elastic solid. |
| Answer» C. Thixotropic substance | |
| 8. |
The viscosity of liquids ..... with increase in temperature. |
| A. | Decreases |
| B. | Increases |
| C. | First decreases and then increases |
| D. | First increases and then decreases. |
| Answer» A. Decreases | |
| 9. |
Surface tension is caused by the force of ..... at the free surface. |
| A. | Cohesion |
| B. | Adhesion |
| C. | Both (a) and (b) |
| D. | None of the above. |
| Answer» A. Cohesion | |
| 10. |
Which of the following is an example of phenomenon of surface tension? |
| A. | Rain drops |
| B. | Rise of sap in a tree |
| C. | Break up of liquid jets |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 11. |
Surface tension is expressed in |
| A. | N/m |
| B. | N/m2 |
| C. | N2/m |
| D. | N/m3 |
| Answer» A. N/m | |
| 12. |
Pressure inside a water droplet is given by the relation |
| A. | p = 4𝜎/d |
| B. | p = 3𝜎/d |
| C. | p = 8𝜎/d |
| D. | p = 16𝜎/d |
| Answer» A. p = 4𝜎/d | |
| 13. |
. ...... is a phenomenon by which a liquid rises into a thin glass tube above or below its general level. |
| A. | Surface tension |
| B. | Capillarity |
| C. | Cohesion |
| D. | Adhesion. |
| Answer» B. Capillarity | |
| 14. |
The capillary rise of water in the glass tube is given by |
| A. | h = 2σ/wd |
| B. | h = 3σ/wd |
| C. | h = 4σ/wd |
| D. | h = 6σ/wd |
| Answer» C. h = 4σ/wd | |
| 15. |
Elasticity of fluids is measured in terms of |
| A. | Young’s modulus of elasticity |
| B. | Shear modulus of elasticity |
| C. | Bulk modulus of elasticity |
| D. | None of the above. |
| Answer» C. Bulk modulus of elasticity | |
| 16. |
Compressibility is the reciprocal of |
| A. | Bulk modulus of elasticity |
| B. | Shear modulus of elasticity |
| C. | Young’s modulus of elasticity |
| D. | Any of the above. |
| Answer» A. Bulk modulus of elasticity | |
| 17. |
Bulk modulus of elasticity is the ratio of |
| A. | Tensile stress to tensile strain |
| B. | Compressive stress to compressive strain |
| C. | Compressive stress to volumetric strain |
| D. | None of the above. |
| Answer» C. Compressive stress to volumetric strain | |
| 18. |
The value of bulk modulus of elasticity .......... with increase of pressure. |
| A. | Increases |
| B. | Decreases |
| C. | Either of the above |
| D. | None of the above. |
| Answer» A. Increases | |
| 19. |
The pressure of a liquid on a surface will always act ...... to the surface. |
| A. | Parallel |
| B. | Normal |
| C. | 45° |
| D. | 60°. |
| Answer» B. Normal | |
| 20. |
The pressure ....... as the depth of the liquid increases. |
| A. | Increases |
| B. | Decreases |
| C. | Remain unchanged |
| D. | None of the above. |
| Answer» A. Increases | |
| 21. |
The intensity of pressure in a liquid due to its depth will vary .... with depth. |
| A. | Directly |
| B. | Indirectly |
| C. | Either of the above |
| D. | None of the above. |
| Answer» A. Directly | |
| 22. |
The height of the free surface above any point is known as |
| A. | Static head |
| B. | Intensity of pressure |
| C. | Either of the above |
| D. | None of the above. |
| Answer» A. Static head | |
| 23. |
“The intensity of pressure at any point in a liquid at rest is the same in all directions.” The above statement is known as |
| A. | Kirchhoff’s law |
| B. | Pascal’s law |
| C. | Either of the above |
| D. | None of the above. |
| Answer» B. Pascal’s law | |
| 24. |
Any pressure measured above the absolute zero of pressure is termed as |
| A. | Atmospheric pressure |
| B. | Gauge pressure |
| C. | Either of the above |
| D. | None of the above |
| Answer» C. Either of the above | |
| 25. |
The fundamental S.I. unit of pressure is N/m2; this is also known as ...... |
| A. | Pascal |
| B. | Stoke |
| C. | Poise |
| D. | None of the above |
| Answer» A. Pascal | |
| 26. |
The intensity of pressure p is related to specific weight w of the liquid and vertical depth h of the point by the equation |
| A. | p = wh |
| B. | h = pw |
| C. | p = wh2 |
| D. | p = wh3. |
| Answer» A. p = wh | |
| 27. |
The point of application of the total pressure on the surface is |
| A. | Centroid of the surface |
| B. | Centre of pressure |
| C. | Either of the above |
| D. | None of the above. |
| Answer» B. Centre of pressure | |
| 28. |
If A is the area of the immersed surface, w is the specific weight of the liquid and ͞x is the depth of horizontal surface from the liquid surface, then the total pressure P on the surface is given by |
| A. | p = wA2 ͞x |
| B. | p = w2A ͞x |
| C. | p = wA ͞x |
| D. | p = wA ͞x2 |
| Answer» C. p = wA ͞x | |
| 29. |
The side of the dam to which the water from the river or the stream approaches is known as |
| A. | Downstream |
| B. | Upstream |
| C. | Either of the above |
| D. | None of the above. |
| Answer» B. Upstream | |
| 30. |
Lock gates are provided to |
| A. | Change the water level in a canal or river for irrigation |
| B. | Store water for irrigation purpose |
| C. | Either of the above |
| D. | None of the above. |
| Answer» A. Change the water level in a canal or river for irrigation | |
| 31. |
The term........ means the study of pressure exerted by a fluid at rest. |
| A. | Hydrostatics |
| B. | Fluid mechanics |
| C. | Continuum |
| D. | Kinetics |
| Answer» A. Hydrostatics | |
| 32. |
The tendency for an immersed body to be lifted up in the fluid, due to an upward force opposite to the action of gravity is known as |
| A. | Buoyancy |
| B. | Centre of buoyancy |
| C. | Buoyant force |
| D. | None of the above. |
| Answer» A. Buoyancy | |
| 33. |
The magnitude of the buoyant force can be determined by |
| A. | Newton’s second law of motion |
| B. | Archimedes’ principle |
| C. | Principle of moments |
| D. | None of the above. |
| Answer» B. Archimedes’ principle | |
| 34. |
When a body is immersed in a fluid, partially or completely, the force of buoyancy is equal to |
| A. | The weight of the body |
| B. | The weight of the fluid displaced by the body |
| C. | The weight of the volume of the fluid equal to the volume of body |
| D. | None of the above. |
| Answer» B. The weight of the fluid displaced by the body | |
| 35. |
The point of application of the force of buoyancy on the body is known as |
| A. | Centre of gravity |
| B. | Centre of buoyancy |
| C. | Metacenter |
| D. | None of the above. |
| Answer» B. Centre of buoyancy | |
| 36. |
“When a body is immersed in a fluid either wholly or partially, it is buoyed or lifted up by a force which is equal to the weight of fluid displaced by the body”. This principle was enunciated by |
| A. | Archimedes |
| B. | Newton |
| C. | Pascal |
| D. | Kirchhoff. |
| Answer» A. Archimedes | |
| 37. |
A floating body is in stable equilibrium when |
| A. | The metacentre is below its centre of gravity |
| B. | The metacentre is above its centre of gravity |
| C. | The metacentric height is zero. |
| D. | Its centre of gravity is below the centre of buoyancy. |
| Answer» B. The metacentre is above its centre of gravity | |
| 38. |
An ice-cube is floating in glass of water. As the cube melts the water level |
| A. | Remain constant |
| B. | Falls |
| C. | Rises |
| D. | None of the above. |
| Answer» B. Falls | |
| 39. |
Metacentric height can be determined by |
| A. | Only analytical method |
| B. | Only experimental method |
| C. | Both (a) and (b) |
| D. | None of the above. |
| Answer» C. Both (a) and (b) | |
| 40. |
If a body does not return to its original position from the slightly displaced angular position and heels farther away, when given a small angular displacement; such an equilibrium is called |
| A. | Stable equilibrium |
| B. | Unstable equilibrium |
| C. | Neutral equilibrium |
| D. | Any of the above |
| Answer» B. Unstable equilibrium | |
| 41. |
The motion of fluid particles may be described by which of the following methods? |
| A. | Langrangian method |
| B. | Eulerain method |
| C. | Both (a) and (b) |
| D. | None of the above. |
| Answer» C. Both (a) and (b) | |
| 42. |
In which of the following methods, the observer concentrates on a point in the fluid system? |
| A. | Langrangian method |
| B. | Eulerian method |
| C. | Any of the above |
| D. | None of the above. |
| Answer» D. None of the above. | |
| 43. |
Normal acceleration in fluid-flow situation exists only when |
| A. | The flow is unsteady |
| B. | The flow is two-dimensional |
| C. | The streamlines are straight and parallel |
| D. | The streamlines are curved. |
| Answer» B. The flow is two-dimensional | |
| 44. |
In a steady flow the velocity |
| A. | Does not change from place to place |
| B. | At a given point does not change with time |
| C. | May change its direction but the magnitude remains unchanged |
| D. | None of the above. |
| Answer» B. At a given point does not change with time | |
| 45. |
The flow in a pipe whose valve is being opened or closed gradually is an example of |
| A. | Steady flow |
| B. | Unsteady flow |
| C. | Rotational flow |
| D. | Compressible flow. |
| Answer» B. Unsteady flow | |
| 46. |
The type of flow in which the velocity at any given time does not change with respect to space is called |
| A. | Steady flow |
| B. | Compressible flow |
| C. | Uniform flow |
| D. | Rotational flow. |
| Answer» C. Uniform flow | |
| 47. |
Flow in a pipe where average flow parameters are considered for analysis is an example of |
| A. | Incompressible flow |
| B. | One-dimensional flow |
| C. | Two-dimensional flow |
| D. | Three-dimensional flow. |
| Answer» B. One-dimensional flow | |
| 48. |
The flow in a river during the period of heavy rainfall is |
| A. | Steady, non-uniform and three-dimensional |
| B. | Steady, uniform, two-dimensional |
| C. | Unsteady, uniform, three-dimensional |
| D. | Unsteady, non-uniform and three-dimensional. |
| Answer» D. Unsteady, non-uniform and three-dimensional. | |
| 49. |
Flow between parallel plates of infinite extent is an example of |
| A. | One-dimensional flow |
| B. | Two-dimensional flow |
| C. | Three-dimensional flow |
| D. | Compressible flow. |
| Answer» B. Two-dimensional flow | |
| 50. |
If the flow is irrational as well as steady it is known as |
| A. | Non-uniform flow |
| B. | One-dimensional flow |
| C. | Potential flow |
| D. | None of the above. |
| Answer» C. Potential flow | |
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