MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Newton’s law of viscosity is a relationship between________________? |
| A. | shear stress anctthejiate of angular distortion |
| B. | shear stress and viscosity |
| C. | shear stress, velocity and viscosity |
| D. | pressure, velocity and viscosity |
| E. | shear stress, pressure and rate of angular distortion |
| Answer» B. shear stress and viscosity | |
| 2. |
Metacentric height is given as the distance between_______________? |
| A. | the center of gravity of the body andthe meta center |
| B. | the center of gravity of the body and the center of buoyancy |
| C. | the center of gravity of the body and the center of pressure |
| D. | center of buoyancy and metacentre |
| E. | none of the above |
| Answer» B. the center of gravity of the body and the center of buoyancy | |
| 3. |
Metacentric height is the distance between the metacentre and___________________? |
| A. | water surface |
| B. | center of pressure |
| C. | center of gravity |
| D. | center of buoyancy |
| E. | none of the above |
| Answer» D. center of buoyancy | |
| 4. |
Metacentre is the point of intersection of _________________________? |
| A. | vertical upward force through e.g. of body and center line of body |
| B. | buoyant force and the center line of body |
| C. | mid point between e.g. and center of buoyancy |
| D. | all of the above |
| E. | none of the above |
| Answer» C. mid point between e.g. and center of buoyancy | |
| 5. |
Mercury is often used in barometer because _________________? |
| A. | it is the best liquid |
| B. | the height of barometer will be less |
| C. | its vapour pressure is so low that it may be neglected |
| D. | both B. and C. |
| E. | it moves easily |
| Answer» E. it moves easily | |
| 6. |
Mercury does not wet glass. This is due to property of liquid known as_________________? |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity |
| E. | compressibility |
| Answer» D. viscosity | |
| 7. |
Mach number is significant in___________________? |
| A. | supersonics, as with projectiles and jet propulsion |
| B. | full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc |
| C. | simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls |
| D. | all of fhe above |
| E. | none of the above |
| Answer» B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc | |
| 8. |
Liquids________________? |
| A. | cannot be compressed |
| B. | occupy definite volume |
| C. | are not affected by change in pressure and temperature |
| D. | GO are not viscous |
| E. | none of the above |
| Answer» F. | |
| 9. |
Liquids transmit pressure equally in all the directions. This is according to_________________? |
| A. | Boyle’s law |
| B. | Archimedes principle |
| C. | Pascal’s law |
| D. | Newton’s formula |
| E. | Chezy’s equation |
| Answer» D. Newton’s formula | |
| 10. |
Kinematic viscosity is dependent upon________________? |
| A. | pressure |
| B. | distance |
| C. | level |
| D. | flow |
| E. | density |
| Answer» F. | |
| 11. |
In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________? |
| A. | constant |
| B. | variable |
| C. | zero |
| D. | zero under limiting conditions |
| E. | never zero |
| Answer» D. zero under limiting conditions | |
| 12. |
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to_________________? |
| A. | sin 9 |
| B. | sin 9 |
| C. | casS |
| D. | cos 9 |
| E. | tan 9 |
| Answer» C. casS | |
| 13. |
In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________? |
| A. | frictional force |
| B. | viscosity |
| C. | surface friction |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 14. |
In an isothermal atmosphere, the pressure__________________? |
| A. | decreases linearly with elevation |
| B. | remains constant |
| C. | varies in the same way as the density |
| D. | increases exponentially with elevation |
| E. | unpredictable |
| Answer» D. increases exponentially with elevation | |
| 15. |
In an immersed body, center of pressure is ____________________? |
| A. | at the center of gravity |
| B. | above the center of gravity |
| C. | below be center of gravity |
| D. | could be above or below e.g. depending on density of body and liquid |
| E. | unpredictable |
| Answer» D. could be above or below e.g. depending on density of body and liquid | |
| 16. |
In a static fluid__________________? |
| A. | resistance to shear stress is small |
| B. | fluid pressure is zero |
| C. | linear deformation is small |
| D. | only normal stresses can exist |
| E. | viscosity is nil |
| Answer» E. viscosity is nil | |
| 17. |
In a free vortex motion, the radial component of velocity everywhere is ________________? |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | non-zero and finite |
| E. | unpredictable |
| Answer» D. non-zero and finite | |
| 18. |
In a forced vortex, the velocity of flow everywhere within the fluid is__________________? |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | non-zero finite |
| E. | unpredictable |
| Answer» E. unpredictable | |
| 19. |
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be____________________? |
| A. | h |
| B. | wh |
| C. | w/h |
| D. | h/w |
| E. | h/wh |
| Answer» C. w/h | |
| 20. |
If the surface of liquid is convex, men_________________? |
| A. | cohesion pressure is negligible |
| B. | cohesion pressure is decreased |
| C. | cohesion pressure is increased |
| D. | there is no cohesion pressure |
| E. | none of the above |
| Answer» D. there is no cohesion pressure | |
| 21. |
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be _____________________? |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 5 meters of water column |
| D. | 6 meters of water Column |
| E. | 7 meters of water column |
| Answer» E. 7 meters of water column | |
| 22. |
If no resistance is encountered by displacement, such a substance is known as___________________? |
| A. | fluid |
| B. | water |
| C. | gas |
| D. | perfect solid |
| E. | ideal fluid |
| Answer» F. | |
| 23. |
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water___________________? |
| A. | 51 cm |
| B. | 50 cm |
| C. | 52 cm |
| D. | 52.2 cm |
| E. | 51.7 cm |
| Answer» B. 50 cm | |
| 24. |
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be_________________? |
| A. | higher than the surface of liquid |
| B. | the same as the surface of liquid |
| C. | lower than the surface of liquid |
| D. | unpredictable |
| E. | none of the above |
| Answer» D. unpredictable | |
| 25. |
If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its_______________? |
| A. | specific weight |
| B. | specific mass |
| C. | specific gravity |
| D. | specific density |
| E. | none of the above |
| Answer» D. specific density | |
| 26. |
Hydrometer is used to determine________________? |
| A. | specific gravity of liquids |
| B. | specific gravity of solids |
| C. | specific gravity of gases |
| D. | relative humidity |
| E. | density |
| Answer» B. specific gravity of solids | |
| 27. |
Hot wire anemometer is used to measure_______________? |
| A. | discharge |
| B. | velocity of gas |
| C. | pressure intensity of gas |
| D. | pressure intensity of liquid |
| Answer» C. pressure intensity of gas | |
| 28. |
Gradually varied flow is____________________? |
| A. | steady uniform |
| B. | non-steady non-uniform |
| C. | non-steady uniform |
| D. | steady non-uniform |
| E. | true one-dimensional |
| Answer» E. true one-dimensional | |
| 29. |
General energy equation holds for_________________? |
| A. | steady flow |
| B. | turbulent flow |
| C. | laminar flow |
| D. | non-uniform flow |
| E. | all of the above |
| Answer» E. all of the above | |
| 30. |
Froude number is significant in____________________? |
| A. | supersonics, as with projectile and jet propulsion |
| B. | full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc |
| C. | simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls |
| D. | all of the above |
| E. | none of the above |
| Answer» D. all of the above | |
| 31. |
Free surface of a liquid tends to contract to the smallest possible area due to force of _________________? |
| A. | surface tension |
| B. | viscosity |
| C. | friction |
| D. | cohesion |
| E. | adhesion |
| Answer» B. viscosity | |
| 32. |
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the______________? |
| A. | force of adhesion |
| B. | force of cohesion |
| C. | force of friction |
| D. | force of diffusion |
| E. | none of die above |
| Answer» C. force of friction | |
| 33. |
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_______________? |
| A. | force of adhesion |
| B. | force of cohesion |
| C. | force of friction |
| D. | force of diffusion |
| E. | none of die above |
| Answer» C. force of friction | |
| 34. |
For very great pressures, viscosity of moss gases and liquids __________________? |
| A. | remains same |
| B. | increases |
| C. | decreases |
| D. | shows erratic behaviour |
| E. | none of the above |
| Answer» E. none of the above | |
| 35. |
For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal__________________? |
| A. | ratio of inertial force to force due to viscosity |
| B. | ratio of inertial force to force due to gravitation |
| C. | ratio of inertial force to force due to surface tension |
| D. | all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity |
| Answer» E. | |
| 36. |
For pipes, turbulent flow occurs when Reynolds number is_________________? |
| A. | less than 2000 |
| B. | between 2000 and 4000 |
| C. | more than 4000 |
| D. | less than 4000 |
| E. | none of the above |
| Answer» D. less than 4000 | |
| 37. |
For pipes, laminar flow occurs when Roynolds number is__________________? |
| A. | less than 2000 |
| B. | between 2000 and 4000 |
| C. | more than 4000 |
| D. | less than 4000 |
| E. | none of the above |
| Answer» B. between 2000 and 4000 | |
| 38. |
For measuring flow by a venturimeter, if should be installed in__________________? |
| A. | vertical line |
| B. | horizontal line |
| C. | inclined line with flow downward |
| D. | inclined line with upward flow |
| E. | in any direction and in any location |
| Answer» F. | |
| 39. |
For manometer, a better liquid combination is one having______________? |
| A. | higher surface tension |
| B. | lower surface tension |
| C. | surface tension is no criterion |
| D. | high density and viscosity |
| E. | low density and viscosity |
| Answer» B. lower surface tension | |
| 40. |
For hypersonic flow, the Mach number is___________________? |
| A. | unity |
| B. | greater than unity |
| C. | greater than 2 |
| D. | greater than 4 |
| E. | greater than 10 |
| Answer» E. greater than 10 | |
| 41. |
For a floating body to be in stable equilibrium, its metacentre should be_________________ ? |
| A. | below the center of gravity |
| B. | below the center of buoyancy |
| C. | above the center of buoyancy |
| D. | between e.g. and center of pressure |
| E. | above the center of gravity |
| Answer» F. | |
| 42. |
For a floating body to be in equilibrium __________________? |
| A. | meta center should be above e.g |
| B. | center of buoyancy and e.g. must lie on same vertical plane |
| C. | a righting couple should be formed |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 43. |
For a body floating in a liquid the normal pressure exerted by the liquid acts at _________________? |
| A. | bottom surface of the body |
| B. | e.g. of the body |
| C. | metacentre |
| D. | all points on the surface of the body |
| E. | all of the above |
| Answer» E. all of the above | |
| 44. |
Fluid is a substance which offers no resistance to change of_________________? |
| A. | pressure |
| B. | flow |
| C. | shape |
| D. | volume |
| E. | temperature |
| Answer» D. volume | |
| 45. |
Fluid is a substance that_______________? |
| A. | cannot be subjected to shear forces |
| B. | always expands until it fills any container |
| C. | has the same shear stress.at a point regardless of its motion |
| D. | cannot remain at rest under action of any shear force |
| E. | flows |
| Answer» E. flows | |
| 46. |
Flow of water in a pipe about 3 meters in diameter can be measured by_________________? |
| A. | orifice plate |
| B. | venturi |
| C. | rotameter |
| D. | pitot tube |
| E. | nozzle |
| Answer» E. nozzle | |
| 47. |
Flow occurring in a pipeline when a valve is being opened is ______________________? |
| A. | steady |
| B. | unsteady |
| C. | laminar |
| D. | vortex |
| E. | rotational |
| Answer» C. laminar | |
| 48. |
Falling drops of water become spheres due to the property of ________________? |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity |
| E. | compressibility |
| Answer» D. viscosity | |
| 49. |
Euler’s dimensionless number relates the following_______________? |
| A. | inertial force and gravity |
| B. | viscous force and inertial force |
| C. | viscous force and buoyancy force |
| D. | pressure force and inertial force |
| E. | pressure force and viscous force |
| Answer» E. pressure force and viscous force | |
| 50. |
Dynamic viscosity of most of the liquids with rise in temperature____________________? |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | unpredictable |
| E. | none of the above |
| Answer» C. remains unaffected | |