MCQOPTIONS
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MCQOPTIONS
This section includes 365 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 2. |
The property by virtue of which a liquid opposes relative motion between its different layers is called |
| A. | Surface tension |
| B. | Coefficient of viscosity |
| C. | Viscosity |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 3. |
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. | |
| 4. |
manometers because Alcohol is used in |
| A. | It has low vapour pressure |
| B. | It is clearly visible |
| C. | It has low surface tension |
| D. | It can provide longer column due to low density |
| Answer» E. | |
| 5. |
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice. |
| A. | Less than twice |
| B. | More than twice |
| C. | Less than three times |
| D. | More than three times |
| Answer» D. More than three times | |
| 6. |
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 | |
| 7. |
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called |
| A. | Density of liquid |
| B. | Specific gravity of liquid |
| C. | Compressibility of liquid |
| D. | Surface tension of liquid |
| Answer» C. Compressibility of liquid | |
| 8. |
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. |
| A. | The bodies A and B have equal stability |
| B. | The body A is more stable than body B |
| C. | The body B is more stable than body A |
| D. | The bodies A and B are unstable |
| Answer» D. The bodies A and B are unstable | |
| 9. |
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as |
| A. | Path line |
| B. | Stream line |
| C. | Steak line |
| D. | Potential line |
| Answer» C. Steak line | |
| 10. |
When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure |
| A. | Varies as the square of the radial distance |
| B. | Increases linearly as its radial distance |
| C. | Increases as the square of the radial distance |
| D. | Decreases as the square of the radial distance |
| Answer» B. Increases linearly as its radial distance | |
| 11. |
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. | |
| 12. |
The shear stress between the two liquid layers is __________ proportional to the distance between two layers. |
| A. | Directly |
| B. | Inversely |
| C. | Both A and B |
| D. | None of these |
| Answer» C. Both A and B | |
| 13. |
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed) |
| A. | A m i) |
| B. | C m i) |
| C. | AC m i) |
| D. | mi A C) |
| Answer» D. mi A C) | |
| 14. |
The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream |
| A. | Keeps on increasing |
| B. | Keeps on decreasing |
| C. | Remain constant |
| D. | May increase/decrease |
| Answer» D. May increase/decrease | |
| 15. |
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is |
| A. | 3.53 kN |
| B. | 33.3 kN |
| C. | 35.3 kN |
| D. | None of these |
| Answer» D. None of these | |
| 16. |
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be |
| A. | 1000 kg |
| B. | 4000 kg |
| C. | 2000 kg |
| D. | 8000 kg |
| Answer» B. 4000 kg | |
| 17. |
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is |
| A. | 0.83 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» C. 0.4 | |
| 18. |
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be |
| A. | Running full |
| B. | Running free |
| C. | Partially running full |
| D. | Partially running free |
| Answer» C. Partially running full | |
| 19. |
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is |
| A. | 4.1 s |
| B. | 5.2 s |
| C. | 10.4 s |
| D. | 14.1 s |
| Answer» D. 14.1 s | |
| 20. |
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be |
| A. | Double |
| B. | Four times |
| C. | Eight times |
| D. | Sixteen times |
| Answer» E. | |
| 21. |
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to |
| A. | Half the depth |
| B. | Half the breadth |
| C. | Twice the depth |
| D. | Twice the breadth |
| Answer» B. Half the breadth | |
| 22. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 23. |
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe) |
| A. | flv /2gd |
| B. | flv /gd |
| C. | 3flv /2gd |
| D. | 4flv /2gd |
| Answer» E. | |
| 24. |
The hydraulic gradient line may be above or below the centre line of the pipe. |
| A. | True |
| B. | False |
| Answer» C. | |
| 25. |
The hydraulic gradient line is always parallel to the centre line of the pipe. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 26. |
The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 27. |
In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 28. |
The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + Ha H = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach) |
| A. | Cd x L2g [H1 - Ha] |
| B. | Cd x L2g [H13/2 - Ha3/2] |
| C. | Cd x L2g [H12 - Ha2] |
| D. | Cd x L2g [H15/2 - Ha5/2] |
| Answer» C. Cd x L2g [H12 - Ha2] | |
| 29. |
The Cippoletti weir is a __________ weir. |
| A. | rectangular |
| B. | triangular |
| C. | trapezoidal |
| D. | circular |
| Answer» D. circular | |
| 30. |
The Francis formula for the discharge over Cippoletti weir is |
| A. | 1.84 LH1/2 |
| B. | 1.84 LH |
| C. | 1.84 LH3/2 |
| D. | 1.84 LH5/2 |
| Answer» D. 1.84 LH5/2 | |
| 31. |
According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 32. |
When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 33. |
A weir is usually made of masonry or concrete. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 34. |
An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch, |
| A. | 1% |
| B. | 1.5% |
| C. | 2% |
| D. | 2.5% |
| Answer» E. | |
| 35. |
The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 36. |
An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch. |
| A. | 1% |
| B. | 1.5% |
| C. | 2% |
| D. | 2.5% |
| Answer» E. | |
| 37. |
A notch is, usually, made of a metallic plate. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 38. |
In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 39. |
In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 40. |
When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 41. |
In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free. |
| A. | True |
| B. | False |
| Answer» C. | |
| 42. |
The loss of head at exit of a pipe is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» B. [B]. | |
| 43. |
A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | none of the above |
| Answer» D. none of the above | |
| 44. |
If the value of coefficient of discharge increases, the discharge through the orifice decreases. |
| A. | True |
| B. | False |
| Answer» C. | |
| 45. |
The velocity of liquid flowing through an orifice varies with the available head of the liquid. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 46. |
If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case. |
| A. | True |
| B. | False |
| Answer» C. | |
| 47. |
The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice. |
| A. | True |
| B. | False |
| Answer» C. | |
| 48. |
In two dimensional flow, the flow does not take place in a curve. |
| A. | True |
| B. | False |
| Answer» C. | |
| 49. |
All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 50. |
A flow through an expanding tube at increasing rate is called unsteady non-uniform flow. |
| A. | Yes |
| B. | No |
| Answer» B. No | |