​CIVIL ENGINEERING- PAGE 16

CIVIL ENGINEERING- PAGE 16

Civil Engineering MCQ- Page 16

1. Method of pricing irrigation water is
(a) flat rate pricing (b) volumetric method of pricing (c) both (a) and (b) (d) None of the above
Ans: C

2. River training works may be classified as
(a) training for discharge (b) training for depth (c) training for sediment (d) All of the above
Ans: D

3. Ram Ganga project is situated in
(a) Uttar Pradesh (b) Uttarakhand (c) Haryana (d) Himachal Pradesh
Ans: B

4. An ideal fluid is defined as the fluid which is
(a) incompressible and non-viscous (b) compressible (c) incompressible (d) compressible and viscous
Ans: A

5. Pascal’s law states that pressure at a point is equal in all directions, in a
(a) static solid (b) static fluid   (c) static gas (d) moving fluid
Ans: B

6. Notch is used in any tank or channel for measurement of
(a) velocity (b) pressure (c) discharge (d) energy
Ans: C

7. Reynold’s number is defined as the ratio of
(a) inertia force to gravity force (b) viscous force to gravity force (c) viscous force to elastic force (d) inertia force to viscous force
Ans: D

8. The soil becomes practically infertile when its pH value is about
(a) 0 (b) 7 (c) 11 (d) None of the above
Ans: C

9. Evaporation is measured by using
(a) an open pan (b) lysimeter   (c) infiltrometer (d) a neutron tube
Ans: A

10. The plot between rainfall intensity and time is called
(a) mass curve (b) hyetograph (c) isohyetal line (d) hydrograph
Ans: B

11. The optimum depth of Kor watering for rice crop is
(a) 13 cm (b) 16 cm (c) 19 cm (d) 22 cm
Ans: C

12. An outlet is said to be proportional, if its flexibility is
(a) equal to unity (b) less than unity (c) slightly greater than unity (d) equal to two
Ans: A

13. The ratio of actual discharge of a jet of water to its theoretical discharge is known as
(a) coefficient of discharge (b) coefficient of velocity   (c) coefficient of contraction (d) coefficient of viscosity
Ans: A

14. If the density of a fluid changes from point to point in a flow region, it is called
(a) steady flow (b) unsteady flow (c) non-uniform flow (d) compressible flow
Ans: D

15. The inlet length of a venturimeter is
(a) equal to the outlet length (b) more than the outlet length (c) less than the outlet length (d) None of the above
Ans: C

16. Manometer is used for measuring
(a) velocity at a point in a fluid    (b) pressure at a point in a fluid (c) difference of pressure between two points (d) both (b) and (c)
Ans: D

17. When the pipes are connected in series, the total rate of flow is
(a) equal to the sum of the rate of flow in each pipe    (b) equal to the reciprocal of the sum of the rate of flow in each pipe
(c) the same as flowing through each pipe (d) None of the above
Ans: C

18. The range for coefficient of discharge (Cd) for a venturimeter is
(a) 0.6 to 0.7 (b) 0.7 to 0.8 (c) 0.8 to 0.9 (d) 0.95 to 0.99
Ans: D

19. Pitot tube is used for the measurement of
(a) pressure at a point (b) velocity at a point (c) discharge at a point (d) None of the above
Ans: B

20. Flow in a pipe is laminar, if
(a) Reynold’s number is equal to 2000 (b) Reynold’s number is equal to 4000
(c) Reynold’s number is more than 4000 (d) Reynold’s number is less than 2000
Ans: D

21. The necessary condition for the flow to be steady is that
(a) the velocity does not change from place to place (b) the velocity is constant at a point with respect to time
(c) the velocity changes at a point with respect to time (d) None of the above
Ans: B

22. Increase of temperature
(a) increases the viscosity of liquid (b) decreases the viscosity of liquid
(c) decreases the viscosity of gas (d) None of the above
Ans: B

23. The most important flood control measure which can be used in isolation for protecting a major city will be
(a) storage reservoir   (b) construction of terraces   (c) soil conservation measures in the upper catchment   (d) flood embankments
Ans: D

24. Which of the following is not a cash crop ?
(a) Jute (b) Tea (c) Rice (d) Sugarcane
Ans: C

25. The minimum freeboard recommended for lined canal carrying discharge greater than 10 m3/s, is
(a) 0.15 m (b) 0.60 m (c) 1.25 m (d) 0.75 m
Ans: D

26. For crops like potato and sugar-beats, the commonly adopted method of surface irrigation is
(a) check flooding (b) free flooding (c) basin flooding (d) furrow irrigation
Ans: D

27. Fish ladder is provided on the side of
(a) divide wall (b) diaphragm wall (c) core wall (d) wing wall
Ans: A

28. The interval of supply of irrigation water depends on
(a) crop only (b) soil and crop   (c) crop and climate (d) soil, crop and climate
Ans: D

29. A core wall is provided in a/an
(a) gravity dam (b) earthen dam (c) canal regulator (d) aqueduct
Ans: B

30. Water logging is eliminated by
(a) deep ploughing (b) shallow ploughing (c) providing drains (d) irrigation
Ans: C

31. The most economical central angle of an arch dam is
(a) 93° (b) 123° (c) 133° (d) 183°
Ans: C

32. Lacey’s regime theory was developed after extensive research in
(a) India (b) Israel (c) Indonesia (d) Iraq
Ans: A

33. Seepage losses in a canal are more when it is
(a) completely in cutting   (b) completely in filling (c) lined (d) partly in filling and partly in cutting
Ans: B

34. Bhakra dam is a/an
(a) non-rigid gravity dam (b) buttress dam (c) gravity dam (d) arch dam
Ans: C

35. Lysimeter is used for measuring
(a) infiltration (b) evaporation (c) vapour pressure (d) evapo-transpiration
Ans: D

36. Reynold’s number for groundwater flow varies from
(a) below 1 (b) 1 to 10 (c) 10 to 15 (d) 15 to 20
Ans: A

37. The removal of air by filling the pump with water is called
(a) priming (b) de-aerating (c) sterilizing (d) None of the above
Ans: A

38. When two centrifugal pumps are operated in series, the discharge
(a) increases (b) decreases (c) remains constant (d) initially increases, then decreases
Ans: C

39. The expression Q = KIA (with usual notations) represents
(a) Rational formula (b) Darcy’s law (c) Manning’s formula (d) Lacey’s equation
Ans: B

40. Lacey’s theory is applicable to flow
(a) through pipes (b) in concrete lined channels (c) over spillways (d) in alluvial rivers and canals
Ans: D

41. Which of the following has maximum water application efficiency ?
(a) Surface irrigation (b) Lift irrigation (c) Sprinkler irrigation (d) Furrow irrigation
Ans: C

42. Hydraulic radius R is defined (with usual notations) as
(a) A/P (b) P/A (c) A/n (d) None of these
Ans: A

43. The outlet discharge factor is the duty at the head of
(a) main canal (b) branch canal (c) distributary (d) water course
Ans: D

44. In North Indian plains, the optimum depth of Kor watering for wheat is
(a) 13.5 cm (b) 15.5 cm (c) 19.0 cm (d) 20.5 cm
Ans: A

45. The moisture content of the soil, after free drainage has removed most of the gravity water, is called
(a) available moisture (b) saturation capacity (c) field capacity (d) gravity water
Ans: C

46. Outlet discharge, for a particular crop, is given by
(a) outlet factor/area (b) area/outlet factor (c) area × outlet factor (d) None of the above
Ans: B

47. The water utilizable by plants is available in soils in the form of
(a) gravity water (b) chemical water (c) hygroscopic water (d) capillary water
Ans: D

48. Kennedy, in his silt theory, assumed that the silt is kept in suspension due to eddies generated from
(a) bed only (b) sides only (c) whole perimeter (d) All of the above
Ans: A

49. Which of the following is not the part of diversion headworks ?
(a) Barrage (b) Divide wall (c) Head regulator (d) Distributary
Ans: D

50. The irrigation structure which is constructed at the crossing of a canal and a drain, to avoid mixing of their respective discharge, is known as
(a) aqueduct (b) super passage (c) both (a) and (b) (d) None of the above
Ans: C

51. The maximum permissible eccentricity, for no tension at the base of the gravity dam, is
(a) B/3 (b) B/4 (c) B/5 (d) B/6 Where B = base width of the dam
Ans: D

52. The major resisting force for a gravity dam is
(a) water pressure (b) wave pressure (c) self weight of the dam (d) uplift pressure
Ans: C

53. If the R.L. of canal bed level and high flood level of drainage are 212.0 m and 210 m respectively, then the cross-drainage work will be   (a) aqueduct (b) syphon (c) syphon aqueduct (d) super passage
Ans: A

54. The discharge per unit drawdown of a well, is called
(a) specific storage (b) specific yield (c) specific capacity (d) None of the above
Ans: C

55. Lining of irrigation channels
(a) may stop leakage of water (b) creates water logging in near-by areas (c) both (a) and (b) (d) None of the above
Ans: A

56. Yield of a well depends upon
(a) area of aquifer opening into the well (b) actual flow velocity (c) permeability of soil (d) All of the above
Ans: D

57. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of the liquid displaced by the body. This statement is called
(a) Pascal’s law (b) Archimedes’s principle (c) Bernoulli’s theorem (d) None of the above
Ans: B

58. When the liquid is flowing through a pipe, the velocity of the flowing liquid is
(a) maximum at the centre and minimum near the walls (b) minimum at the centre and maximum near the walls
(c) zero at the centre and maximum near the walls (d) None of the above
Ans: A

59. A flow, in which each liquid particle has a definite path and the paths of individual particles do not cross each other, is called
(a) steady flow (b) turbulent flow (c) streamline flow (d) None of the above
Ans: C

60. A flow in which quantity of liquid flowing per second is not constant
(a) streamline flow (b) turbulent flow (c) steady flow (d) None of the above
Ans: D

61. A flow through a long pipe, at a constant rate, is called
(a) steady uniform flow (b) steady non-uniform flow (c) unsteady uniform flow (d) unsteady non-uniform flow
Ans: A

62. The pressure of a liquid measured with the help of a piezometer tube is
(a) atmospheric pressure (b) gauge pressure (c) absolute pressure (d) vacuum pressure
Ans: B

63. The best channel cross-section is the one which has
(a) minimum roughness coefficient (b) least count (c) maximum area for a given flow (d) minimum wetted perimeter
Ans: D

64. A channel aligned nearly parallel to the contours of a country, is called
(a) side slope channel (b) watershed channel (c) ridge channel (d) contour channel
Ans: D

65. A weir is said to be narrow-crested, if the width of the crest of the weir is
(a) equal to H (b) more than H (c) less than H (d) None of the above Where H = height of water above weir crest
Ans: C

66. In a centrifugal pump, the liquid enters the pump
(a) at the centre (b) at the bottom (c) at the top (d) from sides
Ans: A

67. The pump, suitable for small discharge and high head, is
(a) centrifugal pump (b) axial flow pump (c) mixed flow pump (d) reciprocating pump
Ans: D

68. Evapo-transpiration of water by a crop means water consumed by
(a) evaporation only (b) conveyance loss and evaporation   (c) transpiration and conveyance loss (d) transpiration and evaporation
Ans: D

69. The hydraulic efficiency of an impulse turbine is maximum, when the ratio of the velocity at wheel to jet velocity is
(a) 1 (b) 3/4 (c) 1/2 (d) 1/4
Ans: C

70. An impulse turbine is used for
(a) low head of water (b) high head of water (c) medium head of water (d) high discharge of water
Ans: B

71. In a reaction turbine, the draft tube is used
(a) to run the turbine full   (b) to prevent air to enter the turbine
(c) to increase the head of water by an amount equal to the height of the runner outlet above the tail race (d) None of the above
Ans: C

72. In a Francis turbine runner, the number of blades are generally between
(a) 2 to 4 (b) 4 to 8 (c) 8 to 16 (d) 16 to 24
Ans: D

73. In a Kaplan turbine runner, the number of blades are generally between
(a) 2 to 4 (b) 4 to 8 (c) 8 to 16 (d) 16 to 24
Ans: B

74. An irrigation project is classified as a major project, when the culturable command area involved in the project is more than
(a) 2000 hectares (b) 5000 hectares (c) 10,000 hectares (d) None of the above
Ans: C

75. A turbine is called reaction turbine, if at the inlet of the turbine the total energy is
(a) kinetic energy only (b) pressure energy only (c) kinetic energy and pressure energy (d) None of the above
Ans: C

76. Notch is a device used for measuring
(a) rate of flow through pipes (b) rate of flow through small channel (c) velocity of flow through a pipe (d) velocity of flow through a small channel
Ans: B

77. The capillary rise or fall of a liquid is given by (with usual notations) :
(a) h = σ cos θ / 4 ρ g d (b) h = 4 σ cos θ / ρ g d (c) h = 8 σ cos θ / ρ g d (d) None of the above
Ans: B

78. Hydraulic gradient line (HGL) represents the sum of
(a) pressure head and kinetic head   (b) kinetic head and datum head
(c) Pressure head, kinetic head and datum head (d) Pressure head and datum head
Ans: D

79. The bed slope of a canal off-taking from a barrage is kept
(a) steeper than the bed slope of the river (b) milder than the bed slope of the river (c) same as that of river (d) None of the above
Ans: D

80. The intensity of irrigation for Kharif is 45% and that for Rabi is 60%, then annual intensity of irrigation is
(a) 60 % (b) 100 % (c) 105 % (d) None of the above
Ans: C

81. In lift irrigation, the flow is
(a) by gravity (b) from lower level to higher level (c) by percolation (d) through sprinkler head
Ans: B

82. The maximum irrigation requirement of rice crop is exhibited by its
(a) maximum delta value (b) maximum duty value (c) minimum duty value (d) None of the above
Ans: C

83. The ratio between the area of a crop irrigated and the quantity of water required during its entire period of growth is known as
(a) delta (b) duty (c) base period (d) crop period
Ans: B

84. Available moisture may be defined as
(a) difference in water content of the soil between field capacity and permanent wilting point
(b) moisture content at permanent wilting point
(c) maximum water holding capacity
(d) None of the above
Ans: A

85. The whole period of cultivation, from the time when irrigation water is first supplied for the preparation of ground to its last-watering before harvesting, is called
(a) Kor period (b) Crop period (c) Base period (d) None of the above
Ans: C

86. When the reservoir is full, the maximum compressive force in a gravity dam is produced
(a) at the toe (b) at the heel (c) within the middle third of the base (d) at the centre of the base
Ans: A

87. The correct sequence of the parts of a canal system is
(a) headworks, major distributary, branch canal and minor distributary
(b) headworks, main canal, branch canal, minor distributary and major distributary
(c) headworks, main canal, branch canal, major distributary and minor ditributary
(d) None of the above
Ans: C

88. In a gravity dam, the shear friction factor against sliding should be
(a) 1 (b) 2 (c) 3 to 4 (d) more than 5
Ans: C

89. The instrument used for accurately measuring velocity of water is
(a) venturimeter (b) Pitot tube (c) Orifice meter (d) Anemometer
Ans: B

90. Provision of a filter and rock-toe, in an earthen dam, is done to
(a) prevent piping action in the dam section (b) collect and drain out the seepage water out of dam
(c) reduce the quantity of seepage water (d) both (a) and (b)
Ans: D

91. If coefficient of contraction for a sharp edged orifice is 0.65 and coefficient of velocity of flow is 0.92, then coefficient of discharge will be
(a) 0.598 (b) 0.706 (c) 1.415 (d) 1.57
Ans: A

92. A drop in canal bed is generally provided, if
(a) ground slope exceeds designed bed slope. (b) design bed slope exceeds ground slope.
(c) ground slope is same as the designed bed slope. (d) None of the above.
Ans: A

93. Khosla’s safe exit gradient for design of weir will be lowest for the soil type
(a) coarse sand (b) fine sand (c) shingle and gravel (d) None of the above
Ans: B

94. In a certain irrigation project and in a given year, 72% and 56% of the culturable command area remained unirrigated in Kharif and Rabi season, then the intensity of irrigation for that year and for that project, will be
(a) 36 % (b) 64 % (c) 72 % (d) 128 %
Ans: C

95. The measures adopted to reclaim water-logged area are
(a) installation of lift irrigation schemes (b) lining of canals (c) lowering of full supply level (d) All of the above
Ans: D

96. A divide wall is provided
(a) at right angles to the axis of the barrage (b) parallel to the axis of the barrage and upstream
(c) parallel to the axis of the barrage and downstream   (d) None of the above
Ans: A

97. If there are two canals taking off from a river (one from each bank), then there will be
(a) one divide wall and one under sluice bay (b) one divide wall and two under sluice bays
(c) two divide walls and one under sluice bay (d) two divide walls and two under sluice bays
Ans: D

98. The volume of rainfall which produces equal run-off is called
(a) point rainfall (b) effective rainfall (c) average rainfall (d) None of the above
Ans: B

99. Irrigation is basically required in
(a) Humid regions (b) Arid regions (c) Semi-arid regions (d) All of the above
Ans: D

100. The geological formation which contains and readily yields water is called
(a) aquifer (b) aquifuge (not containing water) (c) aquitard (d) aquiclude
Ans: A

Civil Engineering