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. |
A hydro-electric site has a head of 100 m and an average discharge of 10m3/s. Assume 92% efficiency, for a greater speed of 6000 rpm, the specific speed of turbine would be |
| A. | 600 |
| B. | 1000 |
| C. | 1500 |
| D. | 1900 |
| E. | None of the above |
| Answer» B. 1000 | |
| 2. |
Manning's formula is used to determine |
| A. | Friction head loss in irregular sections |
| B. | Discharge through weirs and notches |
| C. | Friction head loss in open channels |
| D. | Friction hed loss in pipes running full |
| E. | Friction head loss in pipes running partially full |
| Answer» D. Friction hed loss in pipes running full | |
| 3. |
A 2 cm dia. Pipe transports water at 20 m/s. If it exits out 100 small 2 mm dia. Holes, the existing velocity, in m/s will be |
| A. | 80 |
| B. | 40 |
| C. | 120 |
| D. | 10 |
| E. | 20 |
| Answer» F. | |
| 4. |
Four cars, with a mass of 1500 kg each, are loaded on a 6 m wide, 12 m long small car ferry. How far, in cm, will it sink in the water? |
| A. | 8.3 |
| B. | 11.5 |
| C. | 10.2 |
| D. | 15.2 |
| E. | 9.6 |
| Answer» B. 11.5 | |
| 5. |
In which of the following case of modelling, Reynold number will be used for studying? |
| A. | Hydraulic jump |
| B. | Flow configuration of harbours |
| C. | Flow of castor oil through pipes |
| D. | All of the above |
| Answer» D. All of the above | |
| 6. |
The angle of contact (0) between water and glass tube in case of capillary rise is equal to |
| A. | 90? |
| B. | 128? |
| C. | 10? |
| D. | 157? |
| E. | 0? |
| Answer» F. | |
| 7. |
Capacity of a hydro-electric plant in service in excess of the peak load is known as |
| A. | Peak reserve |
| B. | Hot reserve |
| C. | Spinning reserve |
| D. | Cold reserve |
| E. | Operating reserve |
| Answer» F. | |
| 8. |
Priming is required in |
| A. | centrifugal pumps |
| B. | gear pumps |
| C. | reciprocating pumps |
| D. | all of the above |
| Answer» B. gear pumps | |
| 9. |
If a barometer carries wter instead of mercury, the height of column for a pressure equivalent to 75 cm of mercury will be |
| A. | 1034 cm |
| B. | 1040 cm |
| C. | 1000 cm |
| D. | 1050 cm |
| E. | 1020 cm |
| Answer» F. | |
| 10. |
A low pressure of the order of 10-10 torr is to be measured in a chamber. Which of the following device can be used for this? |
| A. | McLeod gauge |
| B. | Pirani gauge |
| C. | Manometer |
| D. | Bourdon vacuum gauge |
| E. | Ionisation chamber |
| Answer» F. | |
| 11. |
Stanton diagram is a plot of |
| A. | log of friction factor against log of Reynolds number |
| B. | friction factor against Reynolds number |
| C. | friction factor against log of Reynolds number |
| D. | log of friction factor against Reynolds number |
| Answer» B. friction factor against Reynolds number | |
| 12. |
Koyna dam is located in |
| A. | Gujrat |
| B. | Maharashtra |
| C. | Rajasthan |
| D. | Madhya Pradesh |
| E. | Karnataka |
| Answer» C. Rajasthan | |
| 13. |
Spouting velocity is |
| A. | Ideal velocity of jet |
| B. | 50% of ideal velocity of jet |
| C. | Actual velocity of jet |
| D. | Velocity of jet under some specified conditions |
| E. | None of the above |
| Answer» B. 50% of ideal velocity of jet | |
| 14. |
In which contact condition case the value of coefficient of friction is expected to be highest? |
| A. | Steel on steel |
| B. | Steel on steel with two layers of graphite service in between |
| C. | Steel on concrete |
| D. | Steel on steel, greased plates |
| E. | Packing and liner |
| Answer» D. Steel on steel, greased plates | |
| 15. |
Pressure drag results from |
| A. | 10 |
| B. | Deformation drag |
| C. | development |
| D. | Skin friction |
| E. | Occurrence of a wake |
| Answer» F. | |
| 16. |
Which two forces are most important in floating bodies |
| A. | Viscous, buoyancy |
| B. | Gravity, inertial |
| C. | Pressure, viscous |
| D. | Buoyancy, gravity |
| E. | Inertial, pressure |
| Answer» E. Inertial, pressure | |
| 17. |
The existence of velocity potential in fluid indicates that |
| A. | the flow is rotational |
| B. | the vorticity must be non-zero |
| C. | the circulation around any closed curve must have a definite value |
| D. | the vorticity must be zero |
| Answer» F. | |
| 18. |
In axial flow turbines |
| A. | Water enters radially but leaves axially |
| B. | Water enters axially but leaves radially |
| C. | Water enters at an angle but leaves axially |
| D. | Water enters axially and leaves axially |
| E. | None of the above |
| Answer» E. None of the above | |
| 19. |
A hot wire anemometer is used for the measurement of |
| A. | Viscosity of liquids |
| B. | Viscosity of gases |
| C. | Pressure of gases |
| D. | Density of liquids |
| E. | Velocity of gases |
| Answer» F. | |
| 20. |
Capillarity is due to |
| A. | Adhesion |
| B. | Adhesion and cohesion |
| C. | Gravity |
| D. | Cohesion |
| E. | Molecular structure |
| Answer» C. Gravity | |
| 21. |
A concrete masonry block on a hill side for supporting and fixing the penstock is known as |
| A. | Anchor block |
| B. | Support block |
| C. | Concrete block |
| D. | Base block |
| E. | Any of the above |
| Answer» B. Support block | |
| 22. |
Density in terms of viscosity is |
| A. | Kinematic viscosity/Dynamic viscosity |
| B. | Dynamic viscosity/Kinematic viscosity |
| C. | Kinematic viscosity x dynamic viscosity |
| D. | Any of the above |
| E. | None of the above |
| Answer» C. Kinematic viscosity x dynamic viscosity | |
| 23. |
In a centrifugal pump installation while starting, the position of delivery valve is |
| A. | Half open |
| B. | Fully closed |
| C. | Less than half open |
| D. | More than half open |
| E. | Fully open |
| Answer» C. Less than half open | |
| 24. |
If 1% error is encountered in the measurement of head over crest of a rectangular weir, the error in discharge will be nearly |
| A. | 5% |
| B. | 1% |
| C. | 2% |
| D. | 1.50% |
| Answer» F. | |
| 25. |
The centre of pressure of a fully submerged body is almost always located |
| A. | above the centroid |
| B. | at the centroid |
| C. | closer to the centroid |
| D. | bolow the centroid |
| Answer» D. bolow the centroid | |
| 26. |
Which type of pump is different from the others? |
| A. | Duplex pump |
| B. | Piston pump |
| C. | Plunger pump |
| D. | Simplex pump |
| E. | Centrifugal pump |
| Answer» F. | |
| 27. |
Which one of the following method is used to check the stability of gravity dams |
| A. | Pigeaud's method |
| B. | Finite element method |
| C. | Slab analogy method |
| D. | Lattice analogy method |
| E. | All of the above |
| Answer» F. | |
| 28. |
For pumping highly viscous fluid viscous, the type of pump enerally used is |
| A. | Centrifugal |
| B. | Gear vane type |
| C. | Sliding vane type |
| D. | Screw pump |
| E. | Multistage centrifugal |
| Answer» E. Multistage centrifugal | |
| 29. |
A Rankine body can be developed when a source of constant discharge is placed at the origin and in a |
| A. | non-uniform flow |
| B. | uniform flow |
| C. | vortex flow |
| D. | gradually varying flow |
| Answer» D. gradually varying flow | |
| 30. |
The losses in an open channel vary |
| A. | Inversely as the hydraulic radius |
| B. | As the velocity |
| C. | Inversely with a gradient |
| D. | As the square of velocity |
| E. | As the cube of velocity |
| Answer» E. As the cube of velocity | |
| 31. |
The most economical section of a triangular channel is |
| A. | An isosceles triangles with vertex angle of 60? |
| B. | A right angled triangle |
| C. | An equilateral triangle |
| D. | An isosceles triangle with vertex angle of 90? |
| E. | An isosceles triangle with vertex angle of 45? |
| Answer» E. An isosceles triangle with vertex angle of 45? | |
| 32. |
Concentrated solution of sugar is a |
| A. | Dilatant fluid |
| B. | Pseudo plastic fluid |
| C. | Newtonian fluid |
| D. | Ideal fluid |
| E. | None of the above |
| Answer» B. Pseudo plastic fluid | |
| 33. |
Layered or bedded rocks having planes of reltively easy separation are called |
| A. | Swelling rocks |
| B. | Stratified rocks |
| C. | Schistos rocks |
| D. | Squeezing rocks |
| E. | Seamy rocks |
| Answer» B. Stratified rocks | |
| 34. |
If the forces due to inertia, gravity and frictional resistance are insignificant, the design of a channel may be made by comparing |
| A. | Prandt number |
| B. | Reynolds number |
| C. | Weber number |
| D. | Froude's number |
| Answer» F. | |
| 35. |
The friction factor in turbulent flow in smooth pipes depends upon the following |
| A. | (L, D, ?, ?, |
| B. | V, D, ?, L, |
| C. | V, D, |
| D. | L, |
| E. | L, D, Q, V. |
| Answer» D. L, | |
| 36. |
If one of the walls moves in the direction of flow with uniform velocity while the other wall is stationary, then the resulting flow between parallel walls is called |
| A. | Plug flow |
| B. | Euler's flow |
| C. | Couette flow |
| D. | Stoke's flow |
| Answer» E. | |
| 37. |
In a channel the flow at critical depth occurs when |
| A. | Any changes in depth require more specific energy |
| B. | Hydraulic gradient and slope coincide |
| C. | Specific energy is a maximum for a given discharge |
| D. | Normal depth and critical depth coincide for a channel |
| E. | Vitrified clay. |
| Answer» E. Vitrified clay. | |
| 38. |
The velocity distribution for flow between two fixed parallel plates |
| A. | Is constant over the cross-section |
| B. | Varies parabolically across the section |
| C. | Is zero at the plates and linearly increases towards the plates |
| D. | Is zero in the middle and increases linearly towards the plates |
| E. | None of the above |
| Answer» B. Varies parabolically across the section | |
| 39. |
If a weir is constructed for full width of channel, it is known as |
| A. | sharp crested weir |
| B. | suppressed weir |
| C. | submerged weir |
| D. | sultro weir |
| Answer» D. sultro weir | |
| 40. |
The specific speed of a pump is defined as the speed of a pump |
| A. | Of unit size with unit discharge at unit head |
| B. | Of such size that it requires unit power for unit head |
| C. | Of such size that it delivers unit discharge at unit head |
| D. | Of such size that it delivers unit discharge at unit power |
| E. | None of these answers |
| Answer» D. Of such size that it delivers unit discharge at unit power | |
| 41. |
Rocks which contain neither joints nor hair cracks, are known as |
| A. | Popping rocks |
| B. | Squeezing rocks |
| C. | Hard rocks |
| D. | Schistos rocks |
| E. | Stratified rocks |
| Answer» D. Schistos rocks | |
| 42. |
The pressure in millimetres of mercury gauge, equivalent to 68 mm H2O plus 54.4 mm manometer fluid, sp. Gr. 2.5 is |
| A. | 20 |
| B. | 17.5 |
| C. | 12.5 |
| D. | 10 |
| E. | 15.5 |
| Answer» F. | |
| 43. |
A structure in a channel having narrow throat and a raised floor in the bottom which is used to measure the discharge is known as |
| A. | Venturi flume |
| B. | Partial flume |
| C. | Standing wave flume |
| D. | Tilting flume |
| Answer» B. Partial flume | |
| 44. |
The locus of elevations that water will rise in a series of pitot tubes is called |
| A. | the pressure head |
| B. | the hydraulic grade line |
| C. | the velocity head |
| D. | the energy grade line |
| E. | 2.45 |
| Answer» E. 2.45 | |
| 45. |
For a laminar flow through a pipe the shear stress over a cross-section |
| A. | Varies inversely as the distance from the centre of the pipe |
| B. | Varies directly as the distance from the surface of pipe |
| C. | Greater than ten |
| D. | Varies directly as the distance from the centre of the pipe |
| E. | Remains canstant over the cross-section |
| Answer» E. Remains canstant over the cross-section | |
| 46. |
The vertical component of pressure force on a submerged curved surface is equal to |
| A. | Its horizontal component |
| B. | The force on a vertical projection of the curved surface |
| C. | The product of pressure at centroid and surface area |
| D. | The weight of liquid vertically above the curved surface |
| E. | None of the above |
| Answer» E. None of the above | |
| 47. |
If 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, the flow is said to be |
| A. | Uniform flow |
| B. | Steady flow |
| C. | Turbulent flow |
| D. | Laminar flow |
| E. | None of the above |
| Answer» D. Laminar flow | |
| 48. |
1 N/m2 pressure is equivalent to |
| A. | 1 pascal |
| B. | 10-5 bar |
| C. | 10-2 kg/m sec2 |
| D. | 7.5 x 10-3 mm Hg |
| E. | Any of the above |
| Answer» F. | |
| 49. |
Runway speed of a Pelton wheel is |
| A. | No lead speed |
| B. | Actual operating speed |
| C. | 90% greater than normal speed |
| D. | No load speed when governor mechanism fails |
| E. | Full load speed |
| Answer» E. Full load speed | |
| 50. |
Which of the following is not a dimensionless quantity? |
| A. | Specific gravity |
| B. | Pressure coefficient |
| C. | Darcy weisbach friction factor |
| D. | Kinematic viscosity |
| E. | None of the above |
| Answer» E. None of the above | |