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 Weber number is the ratio of |
| A. | Inertial forces to surface tension force |
| B. | Elastic forces to pressure forces |
| C. | Viscous forces to gravity |
| D. | Elastic forces to gravity |
| E. | Intertial forces to viscous forces |
| Answer» B. Elastic forces to pressure forces | |
| 2. |
A turbine model test with 260 mm diameter showed an efficiency of 90 percent. The efficiency that can be expected from a 1.2 m diameter impeller is |
| A. | 90 percent |
| B. | 81 percent |
| C. | 91 percent |
| D. | 93.18 percent |
| E. | None of the above |
| Answer» E. None of the above | |
| 3. |
Stremlines, streak lines and path lines are all identical in case of |
| A. | Steady flow |
| B. | Rotation flow |
| C. | Non-uniform flow |
| D. | Uniform flow |
| E. | Unsteady flow |
| Answer» B. Rotation flow | |
| 4. |
While calculating the specific speed of double suction pump, the discharge to be considered is |
| A. | Square of the actual discharge |
| B. | Actual discharge |
| C. | Double of the actual discharge |
| D. | Square root of actual discharge |
| E. | Half of actual discharge |
| Answer» F. | |
| 5. |
Notch is a device used for measuring |
| A. | Velocity through a pipe |
| B. | Rate of flow through a small channel |
| C. | Velocity through a small channel |
| D. | Rate of flow through pipes |
| Answer» D. Rate of flow through pipes | |
| 6. |
Water flows through a 2 cm dia. Pipe at 20 m/s. It then flows radially outward between two discs, 2 mm apart. When it reaches a radius of 40 cm its velocity, in m/s will be |
| A. | 1.85 |
| B. | 2.5 |
| C. | 1.25 |
| D. | 5 |
| E. | 2.25 |
| Answer» D. 5 | |
| 7. |
A current meter is used for the measurement of |
| A. | Electrical charge on fluids |
| B. | Velocity |
| C. | Electrical conductivity |
| D. | Pressure |
| E. | Viscosity |
| Answer» C. Electrical conductivity | |
| 8. |
Multistage centrifugal pumps are used |
| A. | To produce high heads |
| B. | To give high discharge |
| C. | A and B above together |
| D. | To pump viscous liquids |
| E. | None of the above |
| Answer» B. To give high discharge | |
| 9. |
Which one of the following is laminar flow |
| A. | Rise of water in plants through roots |
| B. | Movement of blood in the arteries of a human body |
| C. | Flow of oil in measuring instruments |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 10. |
Water hammer in pipes takes place when |
| A. | 51.3 |
| B. | flowing fluid is gradually brought to rest |
| C. | fluid is flowing with high pressure |
| D. | fluid is flowing with high velocity |
| E. | flowing fluid is suddenly brought to rest by closing the valve |
| Answer» C. fluid is flowing with high pressure | |
| 11. |
The hydrostatic law states that rate of increase of pressure in a vertical direction is equal to |
| A. | Density of the fluid |
| B. | Specific weight of the fluid |
| C. | Weight of the fluid |
| D. | None of the above |
| E. | Is practically incompressible |
| Answer» C. Weight of the fluid | |
| 12. |
The head over a 90? V-notch weir increases from 0.15 m to 0.3 m. The ratio of the new discharge to the original discharge is |
| A. | 1.25 |
| B. | 4 |
| C. | 5.657 |
| D. | 2 |
| E. | 1.414 |
| Answer» D. 2 | |
| 13. |
Rocks that undergo notable expansion without flow due to preence of clay minerals, are known as |
| A. | Swelling rocks |
| B. | Moderately jointed rocks |
| C. | Seamy rocks |
| D. | Schistos rocks |
| E. | Squeezing rocks |
| Answer» B. Moderately jointed rocks | |
| 14. |
Under which two of the following regimes would the assumption of a continuum be reasonable (1) Free molecule flow (2) Gas dynamics (3) Slip flow (4) Complete vacuum (5) Liquid flow |
| A. | 3,5 |
| B. | 1,5. |
| C. | 1,2 |
| D. | 2,3 |
| E. | 1,4 |
| Answer» B. 1,5. | |
| 15. |
Which mouthpiece is having maximum coefficient of discharge? |
| A. | External mouthpiece |
| B. | Convergent-Divergent mothpiece |
| C. | Internal mouthpiece |
| D. | None of the above |
| E. | None of the above |
| Answer» C. Internal mouthpiece | |
| 16. |
Which is higher head |
| A. | 33 inch Hg |
| B. | 31.6 ft water |
| C. | 14.1 psi |
| D. | 1.013 kg/cm2 |
| E. | 75.6 cm of Hg |
| Answer» B. 31.6 ft water | |
| 17. |
Ogee is |
| A. | overfall of a spillway in the shape of double or S-curve which is convex at the top and concave at the bottom |
| B. | the channel between the silt extractor and the river through which the escapage water is discharged |
| C. | the channel conducting water away from a water wheel |
| D. | none of the above |
| Answer» B. the channel between the silt extractor and the river through which the escapage water is discharged | |
| 18. |
The portion of the power canal which extends from the power house to the recepient water course, is known as |
| A. | Tail race |
| B. | Discharge channel |
| C. | Exhaust |
| D. | Tail surge channel |
| E. | None of the above |
| Answer» B. Discharge channel | |
| 19. |
Nagarjuna Sugar dam has been constucted on river |
| A. | Mabanadi |
| B. | Cauvery |
| C. | Krishna |
| D. | Kali |
| E. | Periyar |
| Answer» D. Kali | |
| 20. |
Force on a flat stationary plate is |
| A. | Velocity of jet before impact - velocity after impact |
| B. | Difference in velocities of jet in the direction normal to plate |
| C. | Mass of water x (difference in velocities of jet) |
| D. | Mass of striking water x (velocity before impact in the direction normal to plate-velocity fter impact in the direction normal to plate). |
| E. | None of the above |
| Answer» E. None of the above | |
| 21. |
Which one of the following is not a disadvantage due to a Buttress dam? |
| A. | Problems arising out of large number of joints in the dam |
| B. | Significance of volume changes of thin members |
| C. | The structure being self-sealing, it is not sensitive to accidental rise in water level above the designed full supply level |
| D. | Bearing stress of the foundtions are higher |
| E. | Overflow arrangements |
| Answer» D. Bearing stress of the foundtions are higher | |
| 22. |
Viscosity will be the most important property in which of the following case |
| A. | Travel of a bullet through air |
| B. | Formation of soap bubbles |
| C. | Flow of castor oil through a pipe. |
| D. | Water jet issuing from a fire hose |
| E. | 1.25 |
| Answer» D. Water jet issuing from a fire hose | |
| 23. |
Which of the following is the result of the formation of a region of low pressure developed on the downstream side due to separation of flow? |
| A. | Vortex street |
| B. | Wakes |
| C. | Cavities |
| D. | Holes |
| Answer» C. Cavities | |
| 24. |
A hydrometer is used to determine |
| A. | Specific gravity of liquids |
| B. | Buoyancy force |
| C. | Viscosity of liquids |
| D. | Surface tension |
| E. | Relative humidity |
| Answer» B. Buoyancy force | |
| 25. |
Drag force is not a function of |
| A. | 1.25 |
| B. | projected area of the body |
| C. | velocity of the body |
| D. | mass density of the fluid |
| E. | mass density of the body |
| Answer» F. | |
| 26. |
A cylinder is kept on a horizontal boundary past which an ideal fluid flows perpendicular to cylinder axis. It will then experience |
| A. | Lift force in vertically downward direction |
| B. | No lift force |
| C. | Some lift force |
| D. | Lift force depends on velocity of flow and mass of cylinder and its contents |
| E. | Lift force in vertically upward direction |
| Answer» C. Some lift force | |
| 27. |
The specific speed for axial flow turbine varies from |
| A. | 0 - 45 |
| B. | 10 - 100 |
| C. | 80 - 200 |
| D. | 200 - 300 |
| E. | None of the above |
| Answer» D. 200 - 300 | |
| 28. |
Specific speed (fps) = k x specific speed (metric where value of k is (for turbines) |
| A. | 8.91 |
| B. | 1 |
| C. | 4.45 |
| D. | 2 |
| E. | 9.81 |
| Answer» D. 2 | |
| 29. |
A high speed vehicle, travelling at 50 m/s, dips an 80 cm wide scoop into water and deflects the water 180. If it dips 5 cm deep what force, in kN, is exerted on the scoop? |
| A. | 200 |
| B. | 25 |
| C. | 120 |
| D. | 100 |
| E. | 50 |
| Answer» B. 25 | |
| 30. |
1 Kilo-Pascal is the same as |
| A. | 1000 N/cm2 |
| B. | 1000 N/m2 |
| C. | 1000 n/mm2 |
| D. | 1000 N/cm |
| Answer» C. 1000 n/mm2 | |
| 31. |
Geometric similarity between model and prototype means |
| A. | The similarity of linear dimensions |
| B. | The similarity of motion |
| C. | The similarity of forces |
| D. | Vitrified clay. |
| E. | The similarity of discharge |
| Answer» B. The similarity of motion | |
| 32. |
The ratio of average velocity to mzximum velocity for steady laminar flow in circular pipes is |
| A. | ? |
| B. | 2 |
| C. | 1 |
| Answer» B. 2 | |
| 33. |
Navier-stokes equation is useful in the analysis of |
| A. | Viscous flow |
| B. | Non-viscous flow |
| C. | Rotational flow |
| D. | Turbulent flow |
| E. | Any of the above |
| Answer» B. Non-viscous flow | |
| 34. |
If the specific speed of a pump is in the range 170 to 400, the type of pump would be |
| A. | Axial flow |
| B. | Radial flow |
| C. | Mixed flow |
| D. | Turbine type |
| E. | None of the above |
| Answer» B. Radial flow | |
| 35. |
The maximum velocity through a circular channel takes place when the depth of flow is equal to |
| A. | 0.95 times the diameter |
| B. | 0.25 times the diameter |
| C. | 0.50 times the diameter |
| D. | 0.37 times the diameter |
| E. | 0.81 times the diameter |
| Answer» F. | |
| 36. |
The metacentric height of ocean going vessels is usually of the order of |
| A. | 1.8 m to 2.0 m |
| B. | 30 cm to 1.2 m |
| C. | 5 m to 7 m |
| D. | 3 m to 5 m |
| E. | 8 m to 10 m |
| Answer» C. 5 m to 7 m | |
| 37. |
In which of the following types of flow the losses are maximum? |
| A. | Turbulent flow |
| B. | Critical flow |
| C. | Transition flow |
| D. | Laminar flow |
| Answer» B. Critical flow | |
| 38. |
In a Buttress dam the inclination of the deck with horizontal is kept between |
| A. | 25? to 30? |
| B. | 35? to 40? |
| C. | 15? to 20? |
| D. | 60? to 75? |
| E. | 10? to 15? |
| Answer» C. 15? to 20? | |
| 39. |
Abnormal load on a earth dam is |
| A. | Weight of dam and structure above it |
| B. | Water pressure corresponding to full reservoir level |
| C. | Weight of the dam |
| D. | Uplift |
| E. | Wave pressure |
| Answer» F. | |
| 40. |
The upper critical Reynolds number is |
| A. | Important from a design view point |
| B. | Not more than 2000 |
| C. | The number at which turbulent flow changes to laminar flow |
| D. | About 2000 |
| E. | Of no practical importance in pipe flow problems |
| Answer» E. Of no practical importance in pipe flow problems | |
| 41. |
The Reyonlds number may be defined as the ratio of |
| A. | Viscous forces to inertial forces |
| B. | Elastic forces to pressure forces |
| C. | Viscous forces to gravity forces |
| D. | Gravity forces to inertial forces |
| E. | None of the above |
| Answer» F. | |
| 42. |
A most economical channel section is one which for a given cross-section area |
| A. | Has maximum depth of fluid flowing |
| B. | Has maximum discharge |
| C. | Has maximum hydraulic radius |
| D. | Has maximum wetted perimeter |
| E. | Has maximum velocity of fluid |
| Answer» C. Has maximum hydraulic radius | |
| 43. |
The turbine that cannot be installed in high head plant is |
| A. | Kaplan turbine |
| B. | Francis turbine, vertical |
| C. | Francis turbine, horizontal |
| D. | Pelton wheel, horizontal |
| E. | Pelton wheel, vertical |
| Answer» B. Francis turbine, vertical | |
| 44. |
A stepped notch is |
| A. | A notch of varying shapes along the line of flow |
| B. | A combination of triangular notches of different sizes |
| C. | A combination of rectangular notches of different sizes |
| D. | Semi-elliptical in section |
| E. | A combination of triangular and a circular section |
| Answer» D. Semi-elliptical in section | |
| 45. |
Which type of pump is different from others? |
| A. | Lobe pump |
| B. | Gear pump |
| C. | Fuel pump for diesel engine |
| D. | Sliding vane pump |
| E. | Centrifugal pump |
| Answer» D. Sliding vane pump | |
| 46. |
The head loss in turbulent flow in a pipe |
| A. | Varies approximately as square of velocity |
| B. | Varies conversely as square of velocity |
| C. | Varies directly as velocity |
| D. | Varies conversely with diameter |
| E. | Varies inversely with diameter |
| Answer» B. Varies conversely as square of velocity | |
| 47. |
If the specific speed of turbine is more than 300, the type of turbine is |
| A. | Kaplan |
| B. | Pelton with nose jets |
| C. | Greater than ten |
| D. | Pelton |
| E. | Francis |
| Answer» B. Pelton with nose jets | |
| 48. |
A trapezoidal weir of horizontal crest with side slopes of one horizontal to four vertical is called |
| A. | trapezoidal weir |
| B. | cippoletti weir |
| C. | sultro weir |
| D. | None of the above |
| Answer» C. sultro weir | |
| 49. |
The velocity of a fluid particle at the centre of the pipe section is |
| A. | Maximum |
| B. | Minimum |
| C. | Average |
| D. | r.m.s. |
| E. | Logarithmic average. |
| Answer» B. Minimum | |
| 50. |
The horizontal to vertical side slope in case of Cpppoletti weir is |
| A. | I : I |
| B. | 1 : ?2 |
| C. | I : 4 |
| D. | 4 : I |
| E. | I : 2 |
| Answer» D. 4 : I | |