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. |
In working out the reltion for the specific speed, the assumption is made that |
| A. | All pumps have similar ratios in all dimensions |
| B. | All pumps of a given type are similar |
| C. | All pumps of a given type are geometrically similar |
| D. | All pumps are similr |
| E. | All pumps are hydraulically similar |
| Answer» D. All pumps are similr | |
| 2. |
An electric overhead crane is specified by |
| A. | Capacity in tons |
| B. | Span |
| C. | Travel |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 3. |
The assumptions made in the most familiar form of Bernoulli's equation is that |
| A. | Fluid is non-viscous |
| B. | Fluid is homogeneous |
| C. | All the above |
| D. | Flow is steady |
| E. | Flow is along the streamlines |
| Answer» D. Flow is steady | |
| 4. |
The equation of continuity of flow is based on the principle of conservation of |
| A. | Momentum |
| B. | Mass |
| C. | Energy |
| D. | All above |
| E. | None of the above |
| Answer» C. Energy | |
| 5. |
Uniform flow in a channel is characterised by which of the following statements |
| A. | Total energy remains constant along the channel |
| B. | Total energy line either rises or falls depending on Froude number |
| C. | 3 |
| D. | Gradient of the total energy is parallel to the channel bed |
| E. | Specific energy varies along the length of the channel |
| Answer» E. Specific energy varies along the length of the channel | |
| 6. |
An ideal flow of any fluid must fulfil the following |
| A. | Boundary layer theory |
| B. | Newton's law of viscosity |
| C. | Newton's law of motion |
| D. | Pascals law |
| E. | Continuity equation |
| Answer» F. | |
| 7. |
A barometer is used to measure |
| A. | Very low pressures |
| B. | Very high pressures |
| C. | Pressure of fluid in a pipe line |
| D. | Atmospheric pressure |
| E. | Pressure differeuce between two points |
| Answer» E. Pressure differeuce between two points | |
| 8. |
Water at 20? C flows in a piping system at a low velocity. At what pressure, in kPa absolute, will cavitation result? |
| A. | 10.6 |
| B. | 2.45 |
| C. | 5.67 |
| D. | 20.1 |
| E. | 35.6 |
| Answer» C. 5.67 | |
| 9. |
The upper surface of the weir over which water flows is known as |
| A. | Contracta |
| B. | Crest |
| C. | Nappe |
| D. | Sill |
| E. | Vein |
| Answer» E. Vein | |
| 10. |
In case of shooting flow, the Froude number is |
| A. | more than one |
| B. | 1 |
| C. | infinitely high |
| D. | zero |
| Answer» C. infinitely high | |
| 11. |
The distance r from the centre of a tube of radius r0 where the average velocity occurs in laminar flow is |
| A. | 0.5 r0 |
| B. | 0.707 r0 |
| C. | 0.8 r0 |
| D. | r0 |
| E. | None of the above |
| Answer» C. 0.8 r0 | |
| 12. |
Which type of turbine is different from others? |
| A. | Banki turbine |
| B. | Kaplan turbine |
| C. | Girard turbine |
| D. | Pelton wheel |
| E. | Jonval turbine |
| Answer» C. Girard turbine | |
| 13. |
Select the pressures that are equivalent |
| A. | 4.3 psi, 10 ft H2O, 20.3 in. Hg |
| B. | 10 psi, 23.1 ft H2O, 4.91 in. Hg |
| C. | 4.33 psi, 10 ft H2O, 8.83 in. Hg |
| D. | 10 psi, 4.33 ft H2O, 20.3 in. Hg |
| E. | 10 psi, 20.3 ft H2O, 23.1 in. Hg |
| Answer» D. 10 psi, 4.33 ft H2O, 20.3 in. Hg | |
| 14. |
The best draulic channel cross-section is the one which has |
| A. | maximum area for a given flow |
| B. | maximum wetted perimeter |
| C. | minimum wetted perimeter |
| D. | least cost |
| Answer» D. least cost | |
| 15. |
The part of a reservoir water which can be utilized for pwer production or other purposes, is known as |
| A. | Main storage |
| B. | Power storage |
| C. | Live storage |
| D. | Useful storage |
| E. | Dead storage |
| Answer» D. Useful storage | |
| 16. |
1 mm Hg pressure is equivalent to |
| A. | 1.333 x 102 N/m2 |
| B. | 1.333 x 10-3 bar |
| C. | 1.3158 x 10-3 atm |
| D. | 1.332 x 102 kg/m-sec2 |
| E. | Any of the above |
| Answer» F. | |
| 17. |
A practical example of steady non-uniform flow is given as the |
| A. | Flow through venturimeter |
| B. | Motion of a river around the pillars of a bridge |
| C. | Constant discharge through straight tapering draft tube turbine |
| D. | Flow through delivery pipe of a reciprocating pump |
| E. | Steadily decreasing flow through a reducing section |
| Answer» D. Flow through delivery pipe of a reciprocating pump | |
| 18. |
A syphon is used to |
| A. | To fill water from a reservoir at lower level to another reservoir with the help of a pump |
| B. | To connect two reservoirs |
| C. | To disconnect water from one reservoir to another |
| D. | To connect two water reservoirs at different levels intervened by a mountain |
| E. | To distribute water from a reservoir at higher level to reservoirs at lower levels |
| Answer» E. To distribute water from a reservoir at higher level to reservoirs at lower levels | |
| 19. |
If the Mach number of a flow is 3 the flow is known as |
| A. | Super-supersonic |
| B. | Supersonic |
| C. | Sonic |
| D. | Sub-sonic |
| E. | None of the above |
| Answer» C. Sonic | |
| 20. |
To determine the reservoir storage capacity for a given uniform demand, one of the following data is most useful |
| A. | Daily flow-duration curve of the stream at the dam site |
| B. | 1.25 |
| C. | Stage discharge relation for the stream at the reservoir site |
| D. | Mass curve of the flow volume for several consecutive years |
| E. | Unit hydrograph of the basin |
| Answer» E. Unit hydrograph of the basin | |
| 21. |
If a centrifugal pump takes too much power, the cause may be |
| A. | Air in water |
| B. | Foot valve too small |
| C. | Air leakage |
| D. | Low speed |
| E. | Heavy liquid. |
| Answer» F. | |
| 22. |
It is desired to predict the performance of a large centrifugal pump from that of a scale model one fourth the diameter. The model absorbs 20 HP when pumping under test head of 20 m at its best speed of 400 r.p.m. The large pump is required to pump against 60 m head. The following will be the speed of the pump |
| A. | 173 RPM |
| B. | 153 RPM |
| C. | 208 RPM |
| D. | 100 RPM |
| E. | 167 RPM |
| Answer» B. 153 RPM | |
| 23. |
Atmospheric pressure held in terms of water column is |
| A. | 7.5 m |
| B. | 8.5 m |
| C. | 9.81 m |
| D. | 10.30 m |
| E. | None of the above |
| Answer» E. None of the above | |
| 24. |
The falling drops of rain acquire spherical shape on account of |
| A. | Surface tension |
| B. | Buoyancy |
| C. | Compressibility |
| D. | Viscosity |
| E. | Vapour pressure |
| Answer» B. Buoyancy | |
| 25. |
A surge wave is an example of |
| A. | 10 |
| B. | steady uniform flow |
| C. | unsteady non-uniform flow |
| D. | steady non-uniform flow |
| E. | unsteady uniform flow |
| Answer» D. steady non-uniform flow | |
| 26. |
Which two forces are most important in laminar flow between closely spaced parallel plates |
| A. | Inertial, viscous |
| B. | Pressure, inertial, inetial |
| C. | Gravity, pressure |
| D. | Viscous, pressure |
| E. | None of the above |
| Answer» B. Pressure, inertial, inetial | |
| 27. |
If the specific speed of a pump is calculated as 5000, the type of pump that should be selected is |
| A. | Axial flow or propeller pump |
| B. | Mixed flow or screw pump |
| C. | Slow speed radial flow |
| D. | Medium speed radial flow |
| E. | High speed radial flow |
| Answer» B. Mixed flow or screw pump | |
| 28. |
Select the correct statement regarding frictionless flow |
| A. | The velocity is always sonic at the throat of a converging diverging tube |
| B. | In diverging conduits the velocity always decreases |
| C. | On supersonic flow the area decreases for increasing velocity |
| D. | Sonic velocity cannot be exceeded at the throat of a converging diverging tube |
| E. | Less than 3 m of water |
| Answer» D. Sonic velocity cannot be exceeded at the throat of a converging diverging tube | |
| 29. |
Newton's law of viscosity relates |
| A. | Shear stress, temperature, viscosity and velocity |
| B. | Pressure, vicosity and rate of angular deformation |
| C. | Yield shear stress, rate of angular deformation and viscosity |
| D. | Pressure, velocity and viscosity |
| E. | Shear stress and rate of angular deformation in a fluid |
| Answer» F. | |
| 30. |
The angle of taper on a draft tube is |
| A. | More than 15? |
| B. | Around 10? |
| C. | Less than 7 |
| D. | More than 20? |
| E. | Around 15? |
| Answer» D. More than 20? | |
| 31. |
A foot valve is provided on |
| A. | Centrifugal pumps |
| B. | Kaplan turbines |
| C. | Pelton wheels |
| D. | High pressure devices |
| E. | All of the above |
| Answer» B. Kaplan turbines | |
| 32. |
A stream line |
| A. | Is the line along the geometrical centre of the flow |
| B. | Is the line of equal velocity in a flow |
| C. | Occurs in all types of flow |
| D. | Is the line along which the rate of pressure drop is uniform |
| E. | Is fixed in space in steady flow |
| Answer» F. | |
| 33. |
The arch dam is not suitable for |
| A. | Low heads |
| B. | Small discharge |
| C. | Wider sites |
| D. | Narrow sites |
| E. | Small discharge and low heads |
| Answer» D. Narrow sites | |
| 34. |
The velocity of flow through homogeneous porous media under constant head is |
| A. | directly proportional to the coefficient of permeability |
| B. | inversely proportional to the coefficient of permeability |
| C. | inversely proportional to the square of the coefficient of permeability |
| D. | directly proportional to the square of the coefficient of permeability |
| Answer» F. | |
| 35. |
Out ward radial flow turbines |
| A. | Are impulse type |
| B. | Are reaction type |
| C. | Are partly impulse partly reaction |
| D. | May be impulse or reaction type |
| E. | None of the above |
| Answer» E. None of the above | |
| 36. |
What pressure, in kPa, is equivalent to 600 mm of Hg? |
| A. | 51.3 |
| B. | 100 |
| C. | 80 |
| D. | 55.2 |
| E. | 95.2 |
| Answer» D. 55.2 | |
| 37. |
Which of the following forces does not act in case of fluids? |
| A. | Gravity force |
| B. | Elastic force |
| C. | Vibratory force |
| D. | Centrifugal force |
| E. | Tensile force |
| Answer» F. | |
| 38. |
A liquid compressed in a cylinder has a volume of 1 litre at 1 MN/m2 and a volume of 995 cu-cm at 2 MN / m2. The bulk modulus of elasticity would be |
| A. | 10 Mpa |
| B. | 200 Mpa |
| C. | Mpa |
| D. | 5 Mpa |
| E. | 20 Mpa |
| Answer» C. Mpa | |
| 39. |
Which of the following forces do not act on fluids |
| A. | Gravity |
| B. | Viscous force |
| C. | Torsion |
| D. | Inertia |
| E. | Pressure |
| Answer» D. Inertia | |
| 40. |
The value of mannings roughness coefficient n, in Manning's formula for flow of fluids through pipes, is expected to be highest in case of |
| A. | Brass pipe |
| B. | Glass pipe |
| C. | Asbestos cement pipe |
| D. | Vitrified sewer pipe |
| E. | Corrugated iron pipe |
| Answer» F. | |
| 41. |
When a fluid is at rest, the shear stress is |
| A. | unpredictable |
| B. | 8.3 |
| C. | zero |
| D. | maximum |
| E. | between zero and maximum |
| Answer» D. maximum | |
| 42. |
The resultant upward pressure of a fluid on a floating body is equal to the wirght of the fluid displaced by the body. This is known as |
| A. | Schmidt's hypothesis |
| B. | Archimedes principle |
| C. | Bernoulli's theorem |
| D. | Pascals law |
| E. | Reynolds principle |
| Answer» C. Bernoulli's theorem | |
| 43. |
Undershot water wheels are those on which water acts |
| A. | Purely by impulse |
| B. | Partly by impulse and partly by reaction |
| C. | Purely by reaction |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Partly by impulse and partly by reaction | |
| 44. |
The motion of a fluid in which the fluid mass rotates without the external force is known as |
| A. | Circulatory motion |
| B. | Forced vortex motion |
| C. | Irrotational motion |
| D. | Rotary motion |
| E. | Free vortex motion |
| Answer» F. | |
| 45. |
In case the adhesion between moleules of a fluid is greater than cohesion between fluid and the glass, then the free level of the fluid in glass tube dipped in the glass vessel will be |
| A. | Lower than the surface of the fluid |
| B. | Same as the surface of the fluid |
| C. | Dependent on atmospheric temperature |
| D. | Dependent on atmospheric pressure |
| E. | Higher than the surface of the fluid |
| Answer» B. Same as the surface of the fluid | |
| 46. |
The principle, "The buoyancy is equal to the weight of the fluid displaced and the line of action is through the centroid of the displaced mass" is known as |
| A. | Newton's law |
| B. | Bernoulli's law |
| C. | First law of fluid mechanics |
| D. | Law of buoyancy |
| E. | Archimedes principle |
| Answer» F. | |
| 47. |
When the dynamic viscosity of a fluid is 0.6 poise and specific gravity is 0.6, the kinematic viscosity of that fluid will be |
| A. | 0.36 poise |
| B. | 0.6 poise |
| C. | 1 poise |
| D. | None of the above |
| E. | More than 20? |
| Answer» D. None of the above | |
| 48. |
Which of the following principle is used in the operation of Mc Leod gauge? |
| A. | Charles law |
| B. | Boyles law |
| C. | Daltons law |
| D. | Pascals law |
| E. | None of the above |
| Answer» C. Daltons law | |
| 49. |
For a supersonic flow, velocity |
| A. | increases with decrease in area of flow |
| B. | increases with increase in area of flow |
| C. | does not change with variation in area of flow |
| D. | None of the above |
| E. | 0.25 times the diameter |
| Answer» C. does not change with variation in area of flow | |
| 50. |
Which fluid is the heaviest? |
| A. | Glycerine |
| B. | Castor oil |
| C. | Carbon tetrachloride |
| D. | Air |
| Answer» D. Air | |