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. |
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called |
| A. | upthrust |
| B. | reaction |
| C. | buoyancy |
| D. | metacentre |
| Answer» D. metacentre | |
| 2. |
Metacentric height is the distance between the metacentre and |
| A. | water surface |
| B. | center of pressure |
| C. | center of gravity |
| D. | center of buoyancy |
| Answer» D. center of buoyancy | |
| 3. |
Centre of pressure compared to e.g. is |
| A. | above it |
| B. | below it |
| C. | at same point |
| D. | above or below depending on area of body |
| Answer» C. at same point | |
| 4. |
The resultant of all normal pressures acts |
| A. | at e.g. of body |
| B. | at center of pressure |
| C. | vertically upwards |
| D. | at metacentre |
| Answer» D. at metacentre | |
| 5. |
Working principle of dead weight pressure gauge tester is based on |
| A. | Pascal’s law |
| B. | Dalton’s law of partial pressure |
| C. | Newton’s law of viscosity |
| D. | Avogadro’s hypothesis |
| Answer» B. Dalton’s law of partial pressure | |
| 6. |
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 6 |
| B. | sin 9 |
| C. | casS |
| D. | cos 9 |
| Answer» C. casS | |
| 7. |
Which of the following manometer has highest sensitivity |
| A. | U-tube with water |
| B. | inclined U-tube |
| C. | U-tube with mercury |
| D. | micro-manometer with water |
| Answer» E. | |
| 8. |
Manometer is used to measure |
| A. | pressure in pipes, channels etc. |
| B. | atmospheric pressure |
| C. | very low pressure |
| D. | difference of pressure between two points |
| Answer» B. atmospheric pressure | |
| 9. |
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 |
| Answer» E. | |
| 10. |
A metal with specific gravity of o floating in a fluid of same specific gravity a will |
| A. | sink to bottom |
| B. | float over fluid |
| C. | partly immersed |
| D. | be fully immersed with top surface at fluid surface |
| Answer» E. | |
| 11. |
Dynamic viscosity of most of the gases with rise in temperature |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | unpredictable |
| Answer» B. decreases | |
| 12. |
Dynamic viscosity of most of the liquids with rise in temperature |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | unpredictable |
| Answer» C. remains unaffected | |
| 13. |
The speed of sound in a ideal gas varies directly as its |
| A. | pressure |
| B. | temperature |
| C. | density |
| D. | absolute temperature |
| Answer» E. | |
| 14. |
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | nozzle |
| D. | all of the above. |
| Answer» E. | |
| 15. |
Piezometer is used to measure |
| A. | pressure in pipe, channels etc. |
| B. | atmospheric pressure |
| C. | very low pressures |
| D. | difference of pressure between two points |
| Answer» D. difference of pressure between two points | |
| 16. |
Which of the following instrument can be used for measuring speed of an aeroplane |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | hot wire anemometer |
| D. | pitot tube |
| Answer» E. | |
| 17. |
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | hot wire anemometer |
| D. | pitot tube |
| Answer» E. | |
| 18. |
Barometer is used to measure |
| A. | pressure in pipes, channels etc. |
| B. | atmospheric pressure |
| C. | very low pressure |
| D. | difference of pressure between two points |
| Answer» C. very low pressure | |
| 19. |
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) |
| Answer» E. | |
| 20. |
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 |
| Answer» D. increases exponentially with elevation | |
| 21. |
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of |
| A. | 1 |
| B. | 1.2 |
| C. | 0.8 |
| D. | 0.75 |
| Answer» E. | |
| 22. |
Operation of McLeod gauge used for low pressure measurement is based on the principle of |
| A. | gas law |
| B. | Boyle’s law |
| C. | Charle’s law |
| D. | Pascal’s law |
| Answer» C. Charle’s law | |
| 23. |
Pressure of the order of 10″‘ torr can be measured by |
| A. | Bourdon tube |
| B. | Pirani Gauge |
| C. | micro-manometer |
| D. | ionisastion gauge |
| Answer» E. | |
| 24. |
The atmospheric pressure with rise in altitude decreases |
| A. | linearly |
| B. | first slowly and then steeply |
| C. | first steeply and then gradually |
| D. | unpredictable |
| Answer» C. first steeply and then gradually | |
| 25. |
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` |
| Answer» B. shear stress and viscosity | |
| 26. |
Capillary action is due to the |
| A. | surface tension |
| B. | cohesion of the liquid |
| C. | adhesion of the liquid molecules and the molecules on the surface of a solid |
| D. | all of the above |
| Answer» E. | |
| 27. |
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 |
| Answer» D. Newton’s formula | |
| 28. |
The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will |
| A. | increase |
| B. | remain unaffected |
| C. | may increase or decrease depending on the characteristics of liquid |
| D. | decrease |
| Answer» E. | |
| 29. |
The continuity equation is connected with |
| A. | viscous/unviscous fluids |
| B. | compressibility of fluids |
| C. | conservation of mass |
| D. | steady/unsteady flow |
| Answer» D. steady/unsteady flow | |
| 30. |
The units of dynamic or absolute viscosity are |
| A. | metres2 per sec |
| B. | kg sec/meter |
| C. | newton-sec per meter |
| D. | newton-sec2 per meter |
| Answer» D. newton-sec2 per meter | |
| 31. |
The process of diffusion of one liquid into the other through a semi-permeable membrane is called |
| A. | viscosity |
| B. | osmosis |
| C. | surface tension |
| D. | cohesion |
| Answer» C. surface tension | |
| 32. |
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called |
| A. | surface tension |
| B. | co-efficient of viscosity |
| C. | viscosity |
| D. | osmosis |
| Answer» D. osmosis | |
| 33. |
The vapour pressure over the concave surface is |
| A. | less man the vapour pressure over the plane surface |
| B. | equal to the vapour pressure over the plane surface |
| C. | greater than the vapour pressure over the plane surface |
| D. | zero |
| Answer» B. equal to the vapour pressure over the plane surface | |
| 34. |
To avoid an interruption in the flow of a syphon, an air vessel is provided |
| A. | at the inlet |
| B. | at the outlet |
| C. | at the summit |
| D. | ay nay point between inlet and outlet |
| Answer» D. ay nay point between inlet and outlet | |
| 35. |
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than |
| A. | 2.4 m above the hydraulic gradient |
| B. | 6.4 m above the hydraulic gradient |
| C. | 10.0 m above the hydraulic gradient |
| D. | 5.0 above the hydraulic gradient |
| Answer» C. 10.0 m above the hydraulic gradient | |
| 36. |
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 |
| Answer» D. there is no cohesion pressure | |
| 37. |
The difference of pressure between the inside and outside of a liquid drop is |
| A. | p = Txr |
| B. | p = T/r |
| C. | p = T/2r |
| D. | p = 2T/r |
| Answer» E. | |
| 38. |
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately |
| A. | 1 mm |
| B. | 5 mm |
| C. | 10 mm |
| D. | 30 mm |
| Answer» E. | |
| 39. |
Surface energy per unit area of a surface is numerically equal to |
| A. | atmospheric pressure |
| B. | surface tension |
| C. | force of adhesion |
| D. | force of cohesion |
| Answer» C. force of adhesion | |
| 40. |
Rain drops are spherical because of |
| A. | viscosity |
| B. | air resistance |
| C. | surface tension forces |
| D. | atmospheric pressure |
| Answer» D. atmospheric pressure | |
| 41. |
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 |
| Answer» C. force of friction | |
| 42. |
The angle of contact in case of a liquid depends upon |
| A. | the nature of the liquid and the solid |
| B. | the material which exists above the free surface of the liquid |
| C. | both of die above |
| D. | any one of the above |
| Answer» D. any one of the above | |
| 43. |
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury? |
| A. | the metal piece will simply float over the mercury |
| B. | the metal piece will be immersed in mercury by half |
| C. | whole of the metal piece will be immersed with its top surface just at mercury level |
| D. | metal piece will sink to the bottom |
| Answer» D. metal piece will sink to the bottom | |
| 44. |
The center of gravity of the volume of the liquid displaced by an immersed body is called |
| A. | meta-center |
| B. | center of pressure |
| C. | center of buoyancy |
| D. | center of gravity |
| Answer» D. center of gravity | |
| 45. |
The buoyancy depends on |
| A. | mass of liquid displaced |
| B. | viscosity of the liquid |
| C. | pressure of the liquid displaced |
| D. | depth of immersion |
| Answer» B. viscosity of the liquid | |
| 46. |
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 |
| Answer» B. the center of gravity of the body and the center of buoyancy | |
| 47. |
Poise is the unit of |
| A. | surface tension |
| B. | capillarity |
| C. | viscosity |
| D. | shear stress in fluids |
| Answer» D. shear stress in fluids | |
| 48. |
The conditions for the stable equilibrium of a floating body are |
| A. | the meta-center should lie above the center of gravity |
| B. | the center of buoyancy and the center of gravity must lie on the same vertical line |
| C. | a righting couple should be formed |
| D. | all the above are correct |
| Answer» E. | |
| 49. |
The resultant upward pressure of the fluid on an immersed body is called |
| A. | upthrust |
| B. | buoyancy |
| C. | center of pressure |
| D. | all the above are correct |
| Answer» C. center of pressure | |
| 50. |
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to |
| A. | Buoyancy |
| B. | Equilibrium of a floating body |
| C. | Archimedes’ principle |
| D. | Bernoulli’s theorem |
| Answer» D. Bernoulli’s theorem | |