MCQOPTIONS
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MCQOPTIONS
This section includes 136 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. |
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________________? |
| A. | a circular disc of plate held normal to flow |
| B. | a sphere |
| C. | a cylinder |
| D. | a streamlined body |
| Answer» B. a sphere | |
| 2. |
Which of the following statements is correct___? |
| A. | Lower critical Reynolds number is of no practical significance in pipe flow problems. |
| B. | Upper critical Reynolds number is significant in pipe flow problems. |
| C. | Lower critical Reynolds number has the value 2000 in pipe flow |
| D. | Upper critical Reynolds number is the number at which turbulent flow changes to laminar flow |
| Answer» B. Upper critical Reynolds number is significant in pipe flow problems. | |
| 3. |
Which of the following is an incorrect statement_______? |
| A. | Coefficient of contraction of a venturimeter is unity |
| B. | Flow nozzle is cheaper than venturimeter but has higher energy loss |
| C. | Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined |
| D. | None of the above statement is correct. |
| Answer» E. | |
| 4. |
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________? |
| A. | L/4 |
| B. | L/3 |
| C. | L/2 |
| D. | L |
| Answer» B. L/3 | |
| 5. |
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________? |
| A. | 0 |
| B. | 1 |
| C. | 4/3 |
| D. | 2 |
| Answer» C. 4/3 | |
| 6. |
When an ideal fluid flows past a sphere________________? |
| A. | highest intensity of pressure occurs around the circumference at right angles to flow |
| B. | lowest pressure intensity occurs at front stagnation point |
| C. | lowest pressure intensity occurs at rear stagnation point |
| D. | total drag is zero |
| Answer» E. | |
| 7. |
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________? |
| A. | linearly with radial distance |
| B. | as the square of the radial distance |
| C. | inversely as the square of the radial distance |
| D. | inversely as the radial distance |
| Answer» C. inversely as the square of the radial distance | |
| 8. |
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________? |
| A. | less than d |
| B. | between d and 1.5 d |
| C. | between 1.5 d and 2d |
| D. | greater than 2d |
| Answer» B. between d and 1.5 d | |
| 9. |
Two pipe systems are said to be equivalent when_________________? |
| A. | head loss and discharge are same in two systems |
| B. | length of pipe and discharge are same in two systems |
| C. | friction factor and length are same in two systems |
| D. | length and diameter are same in two systems |
| Answer» B. length of pipe and discharge are same in two systems | |
| 10. |
The wake_______________? |
| A. | always occurs before a separation point |
| B. | always occurs after a separation point |
| C. | is a region of high pressure intensity |
| D. | none of the above |
| Answer» C. is a region of high pressure intensity | |
| 11. |
The viscosity of a gas_______________? |
| A. | decreases with increase in temperature |
| B. | increases with increase in temperature |
| C. | is independent of temperature |
| D. | is independent of pressure for very high pressure intensities |
| Answer» C. is independent of temperature | |
| 12. |
The velocity distribution for laminar flow through a circular tube__________________? |
| A. | is constant over the cross-section |
| B. | varies linearly from zero at walls to maximum at centre |
| C. | varies parabolically with maximum at the centre |
| D. | none of the above |
| Answer» D. none of the above | |
| 13. |
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to________________? |
| A. | 0.1 |
| B. | 0.01 |
| C. | 0.001 |
| D. | 0.0001 |
| Answer» C. 0.001 | |
| 14. |
The unit of kinematic viscosity is_______________? |
| A. | gm/cm-sec2 |
| B. | dyne-sec/cm2 |
| C. | gm/cm2-sec |
| D. | cm2/sec |
| Answer» E. | |
| 15. |
The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________? |
| A. | PA |
| B. | pA sin 9 |
| C. | pA cos 9 |
| D. | pA tan 9 |
| Answer» B. pA sin 9 | |
| 16. |
The theoretical value of coefficient of contraction of a sharp edged orifice is_______________? |
| A. | 0.611 |
| B. | 0.85 |
| C. | 0.98 |
| D. | 1.00 |
| Answer» B. 0.85 | |
| 17. |
The speed of a pressure wave through a pipe depends upon________________? |
| A. | the length of pipe |
| B. | the viscosity of fluid |
| C. | the bulk modulus for the fluid |
| D. | the original head |
| Answer» D. the original head | |
| 18. |
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________? |
| A. | constant over the cross section |
| B. | parabolic distribution across the section |
| C. | zero at the mid plane and varies linearly with distance from mid plane |
| D. | zero at plates and increases linearly to midpoint |
| Answer» D. zero at plates and increases linearly to midpoint | |
| 19. |
The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is_______________? |
| A. | 1/2 |
| B. | 2/3 |
| C. | 3/2 |
| D. | 2 |
| Answer» B. 2/3 | |
| 20. |
The pressure at the summit of a syphon is_______________? |
| A. | equal to atmospheric |
| B. | less than atmospheric |
| C. | more than atmospheric |
| D. | none of the above |
| Answer» C. more than atmospheric | |
| 21. |
The Prartdtl mixing length is_________________? |
| A. | zero at the pipe wall |
| B. | maximum at the pipe wall |
| C. | independent of shear stress |
| D. | none of the above |
| Answer» B. maximum at the pipe wall | |
| 22. |
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________? |
| A. | at the centroid of the submerged area |
| B. | always above the centroid of the area |
| C. | always below the centroid of the area |
| D. | none of the above |
| Answer» D. none of the above | |
| 23. |
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________? |
| A. | center of gravity |
| B. | center of buoyancy |
| C. | center of pressure |
| D. | metacentre |
| Answer» D. metacentre | |
| 24. |
The pitot tube is used to measure________________? |
| A. | velocity at stagnation point |
| B. | stagnation pressure |
| C. | static pressure |
| D. | dynamic pressure |
| Answer» C. static pressure | |
| 25. |
The motion of air mass in a tornado is a________________? |
| A. | free vortex motion |
| B. | forced vortex motion |
| C. | free vortex at center and forced vortex outside |
| D. | forced vortex at center and free vortex outside |
| Answer» E. | |
| 26. |
The maximum thickness of boundary layer in a pipe of radius r is____________________? |
| A. | 0 |
| B. | r/2 |
| C. | r |
| D. | 2r |
| Answer» D. 2r | |
| 27. |
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. | |
| 28. |
The losses are more in_________________? |
| A. | laminar flow |
| B. | transition flow |
| C. | turbulent flow |
| D. | critical flow |
| Answer» D. critical flow | |
| 29. |
The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________? |
| A. | 32 km |
| B. | 20 km |
| C. | 8 km |
| D. | 4 km |
| Answer» B. 20 km | |
| 30. |
The increase in meta centric height_________________?_x005F_x000D_1. increases stability_x005F_x000D_2. decreases stability_x005F_x000D_3. increases comfort for passengers_x005F_x000D_4. decreases comfort for passengers_x005F_x000D_The correct answer is? |
| A. | (1) and (3) |
| B. | (1)and(iv) |
| C. | (2) and (3) |
| D. | (2) and (4) |
| Answer» C. (2) and (3) | |
| 31. |
The hydraulic grade line is_________________? |
| A. | always above the centre line of pipe |
| B. | never above the energy grade line |
| C. | always sloping downward in the direction of flow |
| D. | all of the above |
| Answer» C. always sloping downward in the direction of flow | |
| 32. |
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________? |
| A. | 1/3 |
| B. | 1/4 |
| C. | 1/2 |
| D. | 2/3 |
| Answer» B. 1/4 | |
| 33. |
The horizontal component of force on a curved surface is equal to the_______________? |
| A. | product of pressure intensity at its centroid and area |
| B. | force on a vertical projection of the curved surface |
| C. | weight of liquid vertically above the curved surface |
| D. | force on the horizontal projection of the curved surface |
| Answer» C. weight of liquid vertically above the curved surface | |
| 34. |
The eddy viscosity for turbulent flow is______________? |
| A. | a function of temperature only |
| B. | a physical property of the fluid |
| C. | dependent on the flow |
| D. | independent of the flow |
| Answer» D. independent of the flow | |
| 35. |
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________? |
| A. | 0.223 R |
| B. | 0.423 R |
| C. | 0.577 R |
| D. | 0.707 R |
| Answer» B. 0.423 R | |
| 36. |
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is_______________? |
| A. | 1/3 R |
| B. | 1/2 R |
| C. | 2/3 R |
| D. | 3/4R |
| Answer» B. 1/2 R | |
| 37. |
The discharge through a V- notch varies as______________? |
| A. | H1/2 |
| B. | H3’2 |
| C. | H5/2 |
| D. | H5’4 where H is head |
| Answer» D. H5’4 where H is head | |
| 38. |
The discharge over a broad crested weir is maximum when the depth of flow is_______________? |
| A. | H/3 |
| B. | H/2 |
| C. | 2 H/5 |
| D. | 2 H/3 |
| Answer» E. | |
| 39. |
The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is__________________? |
| A. | laminar flow |
| B. | transition flow |
| C. | turbulent flow |
| D. | not predictable from the given data |
| Answer» B. transition flow | |
| 40. |
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________? |
| A. | 0.423 D |
| B. | 0.577 D |
| C. | 0.223 D |
| D. | 0.707 D |
| Answer» C. 0.223 D | |
| 41. |
The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________? |
| A. | d > m > e |
| B. | d > e > m |
| C. | e > m > d |
| D. | e > d > m |
| Answer» E. | |
| 42. |
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________? |
| A. | steady flow |
| B. | uniform flow |
| C. | incompressible flow |
| D. | frictionless flow |
| Answer» B. uniform flow | |
| 43. |
The boundary layer thickness in turbulent flow varies as______________? |
| A. | x”7 |
| B. | x,/2 |
| C. | x4/5 |
| D. | x3/5 |
| Answer» D. x3/5 | |
| 44. |
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________? |
| A. | 0.40 cm |
| B. | 0.20 cm |
| C. | 0.10 cm |
| D. | 0.05 cm |
| Answer» C. 0.10 cm | |
| 45. |
Pascal-second is the unit of______________? |
| A. | pressure |
| B. | kinematic viscosity |
| C. | dynamic viscosity |
| D. | surface tension |
| Answer» D. surface tension | |
| 46. |
Newton’s law of viscosity relates________________? |
| A. | intensity of pressure and rate of angular deformation |
| B. | shear stress and rate of angular deformation |
| C. | shear stress, viscosity and temperature |
| D. | viscosity and rate of angular deformation |
| Answer» C. shear stress, viscosity and temperature | |
| 47. |
Metacentric height for small values of angle of heel is the distance between the________________? |
| A. | centre of gravity and centre of buoy-ancy |
| B. | centre of gravity and metacentre |
| C. | centre of buoyancy and metacentre |
| D. | free surface and centre of buoyancy |
| Answer» C. centre of buoyancy and metacentre | |
| 48. |
Least possible value of correction factor for________________?_x005F_x000D_1. kinetic energy is zero_x005F_x000D_2. kinetic energy is 1_x005F_x000D_3. momentum is zero_x005F_x000D_4. momentum is 1_x005F_x000D_The correct statements are? |
| A. | (1) and (3) |
| B. | (2) and (3) |
| C. | (1) and (4) |
| D. | (2) and (4) |
| Answer» E. | |
| 49. |
In steady flow of a fluid, the total accele ration of any fluid particle______________? |
| A. | can be zero |
| B. | is never zero |
| C. | is always zero |
| D. | is independent of coordinates |
| Answer» B. is never zero | |
| 50. |
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 | |