MCQOPTIONS
Saved Bookmarks
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. |
_Which of the following is the unit of kinematic viscosity$? |
| A. | pascal |
| B. | poise |
| C. | stoke |
| D. | faraday |
| Answer» D. faraday | |
| 2. |
_In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than$? |
| A. | frictional force |
| B. | viscosity |
| C. | surface friction |
| D. | all of the above |
| Answer» E. | |
| 3. |
_The speed of sound in a ideal gas varies directly as its$? |
| A. | absolute temperature |
| B. | temperature |
| C. | density |
| D. | modulus of elasticity |
| Answer» B. temperature | |
| 4. |
_Hot wire anemometer is used to measure$? |
| A. | discharge |
| B. | velocity of gas |
| C. | pressure intensity of gas |
| D. | pressure intensity of liquid |
| Answer» C. pressure intensity of gas | |
| 5. |
_The increase of temperature results in$? |
| A. | increase in viscosity of gas |
| B. | increase in viscosity of liquid |
| C. | decrease in viscosity of gas |
| D. | decrease in viscosity of liquid |
| Answer» E. | |
| 6. |
_Units of surface tension are$? |
| A. | energy/unit area |
| B. | distance |
| C. | both of the above |
| D. | it has no units |
| Answer» D. it has no units | |
| 7. |
_The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is$? |
| A. | 2.4 m |
| B. | 3.0 m |
| C. | 4.0 m |
| D. | 2.5 m |
| Answer» C. 4.0 m | |
| 8. |
_The angle of contact in case of a liquid depends upon$? |
| 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 | |
| 9. |
_The losses are more in$? |
| A. | laminar flow |
| B. | transition flow |
| C. | turbulent flow |
| D. | critical flow |
| Answer» D. critical flow | |
| 10. |
_Differential monometer is used to measure$? |
| A. | pressure in pipes, channels etc |
| B. | atmospheric pressure |
| C. | very low pressure |
| D. | difference of pressure between two points |
| Answer» E. | |
| 11. |
_Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the$? |
| A. | force of adhesion |
| B. | force of cohesion |
| C. | force of friction |
| D. | force of diffusion |
| Answer» C. force of friction | |
| 12. |
_The flow which neglects changes in a transverse direction is known as$? |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow |
| Answer» B. uniform flow | |
| 13. |
_Rotameter is a device used to measure$? |
| A. | absolute pressure |
| B. | velocity of fluid |
| C. | flow |
| D. | rotation |
| Answer» D. rotation | |
| 14. |
_A fluid is said to be ideal, if it is$? |
| A. | incompressible |
| B. | inviscous |
| C. | inviscous and compressible |
| D. | inviscous and incompressible. |
| Answer» E. | |
| 15. |
_Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by$? |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» B. 10% | |
| 16. |
_The center of gravity of the volume of the liquid displaced by an immersed body is called$? |
| A. | center of gravity |
| B. | center of pressure |
| C. | metacentre |
| D. | center of buoyancy |
| Answer» E. | |
| 17. |
_For pipes, turbulent flow occurs when Reynolds number is$? |
| A. | less than 2000 |
| B. | between 2000 and 4000 |
| C. | more than 4000 |
| D. | less than 4000 |
| Answer» D. less than 4000 | |
| 18. |
_In an isothermal atmosphere, the pressure$? |
| 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 | |
| 19. |
Pitot tube is used for measurement of$? |
| A. | pressure |
| B. | flow |
| C. | velocity |
| D. | dsscharge |
| Answer» D. dsscharge | |
| 20. |
The increase in meta centric heighti) increases stabilityii) decreases stabilityiii) increases comfort for passengersiv) decreases comfort for passengersThe correct answer is$? |
| A. | (i) and (iii) |
| B. | (i) and (iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 21. |
The difference of pressure between the inside and outside of a liquid drop is$? |
| A. | (a)p = Txr |
| B. | (b)p = T/r |
| C. | p = T/2r |
| D. | (d)p = 2T/r |
| Answer» E. | |
| 22. |
Metacentric height is given as the distance between$? |
| 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 | |
| 23. |
Specific weight of sea water is more that of pure water because it contains$? |
| A. | dissolved air |
| B. | dissolved salt |
| C. | suspended matter |
| D. | all of the above |
| Answer» E. | |
| 24. |
For a floating body to be in equilibrium$? |
| 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 |
| Answer» E. | |
| 25. |
The region between the separation streamline and the boundary surface of the solid body is known as$? |
| A. | wake |
| B. | drag |
| C. | lift |
| D. | boundary layer |
| Answer» B. drag | |
| 26. |
An open vessel of water is accelerated up an inclined plane. The free water surface will$? |
| A. | be horizontal |
| B. | make an angle in direction of inclination of inclined plane |
| C. | make an angle in opposite direction to inclination of inclined plane |
| D. | any one of above is possible |
| Answer» D. any one of above is possible | |
| 27. |
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will$? |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | increase/decrease depending on depth of immersion |
| Answer» D. increase/decrease depending on depth of immersion | |
| 28. |
The resultant of all normal pressures acts$? |
| A. | at e.g. of body |
| B. | at center of pressure |
| C. | vertically upwards |
| D. | at metacentre |
| Answer» D. at metacentre | |
| 29. |
The units of viscosity are$? |
| A. | metres² per sec |
| B. | kg sec/metre |
| C. | newton-sec per metre2 |
| D. | newton-sec per metre |
| Answer» C. newton-sec per metre2 | |
| 30. |
Ay between two stream lines represents$? |
| A. | velocity |
| B. | discharge |
| C. | head |
| D. | pressure |
| Answer» C. head | |
| 31. |
The density of water is 1000 kg/m3 at$? |
| A. | 0°C |
| B. | 0°K |
| C. | 4°C |
| D. | 20°C |
| Answer» D. 20¬¨‚àûC | |
| 32. |
Uniform flow occurs when$? |
| A. | the flow is steady |
| B. | the flow is streamline |
| C. | size and shape of the cross section in a particular length remain constant |
| D. | size and cross section change uniformly along length |
| Answer» D. size and cross section change uniformly along length | |
| 33. |
In a Sutro weir, the discharge is proportional to (where H is head)$? |
| A. | H1/2 |
| B. | H3/2 |
| C. | H5/2 |
| D. | H |
| Answer» E. | |
| 34. |
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if$? |
| A. | the area is horizontal |
| B. | the area is vertical |
| C. | the area is inclined |
| D. | all of the above |
| Answer» E. | |
| 35. |
Bernoulli equation deals with the law of conservation of$? |
| A. | mass |
| B. | momentum |
| C. | energy |
| D. | work |
| Answer» D. work | |
| 36. |
The major loss of energy in long pipes is due to$? |
| A. | sudden enlargement |
| B. | sudden contraction |
| C. | gradual contraction or enlargement |
| D. | friction |
| Answer» E. | |
| 37. |
The conditions for the stable equilibrium of a floating body are$? |
| A. | the meta-center should lie above the center of gravity |
| B. | the center of buoyancy and the center of gravity must lie on the same vertical line |
| C. | a righting couple should be formed |
| D. | all the above are correct |
| Answer» E. | |
| 38. |
For a body floating in a liquid the normal pressure exerted by the liquid acts at$? |
| A. | bottom surface of the body |
| B. | e.g. of the body |
| C. | metacentre |
| D. | all points on the surface of the body |
| Answer» E. | |
| 39. |
A body floats in stable equilibrium$? |
| A. | when its meatcentric height is zero |
| B. | when the metancentre is above e.g. |
| C. | when its e.g. is below it’s center of buoyancy |
| D. | metacentre has nothing to do with position of e.g. for determining stability |
| Answer» C. when its e.g. is below it‚Äö√Ñ√¥s center of buoyancy | |
| 40. |
The center of pressure of a surface subjected to fluid pressure is the point$? |
| A. | on the surface at which resultant pres-sure acts |
| B. | on the surface at which gravitational force acis |
| C. | at which all hydraulic forces meet |
| D. | similar to metacentre |
| Answer» B. on the surface at which gravitational force acis | |
| 41. |
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as$? |
| A. | one dimensional flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow |
| Answer» E. | |
| 42. |
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be$? |
| A. | 1 m |
| B. | 10m |
| C. | 100m |
| D. | none of the above |
| Answer» D. none of the above | |
| 43. |
An ideal flow of any fluid must satisfy$? |
| A. | Pascal law |
| B. | Newton’s law of viscosity |
| C. | boundary layer theory |
| D. | continuity equation |
| Answer» E. | |
| 44. |
In series-pipe problems$? |
| A. | the head loss is same through each pipe |
| B. | the discharge is same through each pipe |
| C. | a trial solution is not necessary |
| D. | the discharge through each pipe is added to obtain total discharge |
| Answer» C. a trial solution is not necessary | |
| 45. |
Stream lines and path lines always coincide in case of$? |
| A. | steady flow |
| B. | laminar flow |
| C. | uniform flow |
| D. | turbulent flow |
| Answer» B. laminar flow | |
| 46. |
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately$? |
| A. | 5 mm |
| B. | 10 mm |
| C. | 20 mm |
| D. | 30 mm |
| Answer» E. | |
| 47. |
Mach number is significant in$? |
| A. | supersonics, as with projectiles and jet propulsion |
| B. | full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc |
| C. | simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls |
| D. | all of fhe above |
| Answer» B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc | |
| 48. |
A fluid in equilibrium can’t sustain$? |
| A. | tensile stress |
| B. | compressive stress |
| C. | shear stress |
| D. | bending stress |
| Answer» D. bending stress | |
| 49. |
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be$? |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 3.5 meters of water column |
| D. | 4 m of water column |
| Answer» C. 3.5 meters of water column | |
| 50. |
Dynamic viscosity of most of the gases with rise in temperature$? |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | unpredictable |
| Answer» B. decreases | |