water management Mcqs
51. An engineer who is approached by a client for the purpose of design of hydraulic structures like dam. Barrage or Regulator is called ____________________?
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A. Irrigation Engineer

B. Chartered Engineer

C. Consulting Engineer

D. All are correct

52. The resultant pressure of water acting at ________________________?
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A. None of these

B. H/3

C. H/2

D. 2H/3

53. The minimum moisture content at which a water drop if placed on a smooth surface of soil will not be absorbed immediately by the soil is called __________________?
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A. Soil saturation

B. Soil moisture content

C. All are correct

D. Moisture content

54. Compressibility of a liquid is defined as vertical or contraction in volume with variation of pressure. Therefore water is considered as ___________________?
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A. In-Compressible

B. Expandable

C. All are correct

D. Compressible

55. The last length of the river before it falls into the sea is known as __________________?
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A. Sub-mountainous stage

B. Mountainous stage

C. trough stage

D. Delta stage
56. That part of the flow in a stream comes from sub-soil or valley, may be beneath the top surface of channel bed is called__________________?
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A. Ground flow

B. Sub-surface flow

C. All are correct

D. Base flow
57. The depth of root zone for rice crop is about___________________?
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A. 100 cm

B. 70 cm

C. 80 cm

D. 90 cm
58. The depth of flow at which the energy is maximum is called ____________________?
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A. Critical depth

B. All are correct

C. Sub-critical depth

D. Super critical depth

59. The season that starts from 1st October and ends on 31st March, runs for 182 days is called __________________?
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A. Rabi season

B. Monsoon season

C. Kharif season

D. Wheat season

60. The height from the top of the embankment to the normal water level in canal .Dam Reservoir etc, which allows for small waves to splash without over flow is called___________________?
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A. Free board

B. Free space

C. Free end

D. Free faced

61. Cultivation made on small plane steps because of more steepness of the area is called __________________?
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A. Cascade farming

B. Terrace farming

C. All are correct

D. Step farming

62. Sliding failure occurs in a solid gravity dam when____________________?
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A. Shear friction factor Is less than 1.5

B. Resultant of all forces cuts the base at the inner middle third point

C. Ratio of over turning moments exceeds than unity

D. Resultant of all forces cuts the base of the dam out side the toe

63. An escape constructed with masonry or pitched with stones to dispose off surplus of tank or reservoir is called________________?
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A. Bye-wash

B. Disposal channel

C. Water escape

D. paved-escape
64. Cavitation is caused by _____________________?
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A. High velocity

B. Low pressure

C. High pressure

D. Low discharge

65. Rabi crops pertains to ___________________?
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A. Monsoon season

B. Throughout the year

C. Summer season

D. Winter season
66. Mercury does not wet the glass because of its property of ______________________?
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A. Capillary

B. Viscosity

C. Compressibility

D. Surface tension
67. A watershed canal __________________?
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A. Is most suitable in hilly areas

B. Avoids the cross drainage works

C. Is generally aligned parallel to the contour of the area

D. Irrigates only on one side

68. A fluid is a substance that ____________________?
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A. Is partially incompressible

B. Can not remain at rest under the action of any shear force

C. Can not be subjected to shear force

D. Always expands until it fills any container

69. The piezometric level of water in the well at zero discharges is called___________________?
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A. Static water level

B. Full supply level

C. Water table

D. All are correct

70. velocity of gases is measured with a _____________________?
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A. Barometer

B. Hot wire manometer

C. Hot wire anemometer

D. All are correct

71. if the depth of water in an open channel is greater than the critical depth, the flow is called________________?
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A. Non-critical flow

B. Critical depth

C. Shooting flow

D. Sub-critical flow
72. The velocity in a large canal or channel measured at a depth of ___________________ gives the mean velocity using the current meter?
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A. 0.6m

B. 0.5 depth

C. 0.5m

D. 0.6 depth
73. The delta the total water requirement of crop from the time of sowing to harvesting the delta of sugarcane is __________________?
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A. 100cm

B. 70cm

C. 80cm

D. 120cm
74. Development of___________in river is due to meandering ?
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A. Turbulence

B. Critical velocity

C. Cutoff

D. Delta

75. A flow in which velocity of water particles is same at all sections is called ____________________?
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A. Steady flow

B. Compressible flow

C. Uniform flow

D. Laminar flow

76. An area is officially declared as drought effected if the mean Annual rain fall is less than of the annual Potential evaporation,______________?
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A. 70%

B. 85%

C. 75%

D. 80%

77. Out/ of a well water is more than canal water because____________________?
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A. Well water is used economically

B. Conveyance losses in well irrigation are less

C. Lifting of water increase cost of well water

D. Well water is clear than canal water

78. In case of silt deposition in the dam reservoir to dispose of the effectively ________________ be used?
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A. All are correct

B. Vortex pipes

C. Silt excluders

D. Silt ejectors

79. The law that states that the discharge of sub-soil water is directly proportional to the loss of head and the area of soil sample and inversely proportional to to the length of soil sample ___________________?
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A. Darcys law

B. Thiems law

C. Archimeds principle

D. Permeability law

80. Weep holes are provided in canal lining to _____________________?
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A. Have drainage facility

B. Give additional anchorage against sliding

C. improve strength of lining

D. Provide water into branch canals

81. The ratio of specific weight of any liquid to the specific weight of water is called as _________________?
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A. Density of water

B. Density of liquid

C. Specific gravity of water

D. Specific gravity of liquid
82. Water storage efficiency in the root zone depends upon__________________?
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A. Fine particles of soil

B. Climatic conditions

C. Coarse particles of soil

D. Porosity
83. The discharge over a rectangular notch is determined by _____________________?
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A. 2/3 cd. B (2g) 1/2 H3/2

B. 2/3 cd. b (2 gh) 1/2

C. 2/3 cd. b (2g) 1/2 H 5/2

D. 2/3 cd. B (2g) 1/2 H

84. The falling drop of rainwater become spherical due to _________________?
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A. Capillary

B. Compressibility

C. Surface Tension

D. None of these

85. From a water fall, if water is falling down at the rate of 100 N/sec: on the blades of a turbine when the height of fall is 100 m the power delivered to turbine will be______________?
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A. 100 kw

B. 10,000 kw

C. 1000 kw

D. 5000 kw

86. A channel is said lo be of most economical cross section, for a given cross-sectional area and bed slope when it __________________?
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A. All of these

B. Involves lesser excavation

C. Has minimum wetted perimeter

D. Gives max. Discharge

87. An instrument used for measuring pressure head, generally made up of a small pipe tapped into the side of conduit is called ___________________?
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A. Piezometer

B. Manometer

C. Pilot tube

D. All are correct

88. hail is precipitation in the form of balls or lumps of ice of size greater than _______________ formed by alternate freezing & melting?
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A. 15 mm diameter

B. 10 mm diameter

C. 20 mm diameter

D. 5 mm diameter
89. To dispose of the surplus water from dam, a water way is constructed called________________?
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A. Channel

B. All are correct

C. Spillway

D. Water escape

90. For a perfect incompressible liquid flowing in a continuous stream, the total energy of a particle remain the same, while the liquid particle move from one point to another this statement is called ___________________?
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A. Pascal s law

B. Bernoulli equation

C. Continuity Equation

D. Archimedes principle

91. The water in swimming pools can be ____________ by using any one from the following, chlorine-ultraviolet rays and bromine t ?
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A. Cleaned

B. Disinfected

C. Infected

D. Iodized

92. The structures, which are constructed on the river bed upstream of head regulator. With this clear water enters in canal such structures are called______________________?
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A. Silt ejectors

B. Silt excluders

C. Vortex pipes

D. Silt control structures

93. The centre of pressure of a plane submerged area which holds it in equilibrium is ____________________?
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A. Always below the centre of gravity of the area

B. Coincident with centroid of area if its plane is vertical

C. Independent of the inclination of area

D. Always above the centroid of the area
94. The force with which the particles of same body are held together is called_______________?
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A. Surface tension

B. Cohesion

C. All are correct

D. Adhesion

95. The percentage of the volume of water filled in voids to the total volume of solids of soil grains is called__________________?
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A. Degree of saturation

B. Degree of compaction

C. Volume of saturation

D. Void ratio

96. The line in a flow net which shows the direction of flow of water through a soil mass beneath dam are called _________________?
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A. Section lines

B. Equipotential lines

C. Streak lines

D. flow lines
97. When seepage water after passing the ground water aquifer joins the surface stream, such stream will be called_____________________?
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A. Storm stream

B. Effluent stream

C. Influent stream

D. Rain stream

98. The mass per unit volume of a liquid at standard temperature and pressure is called ____________________?
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A. None of these

B. Mass density

C. Specific weight

D. Specific gravity

99. Mostly the salt of calcium and Magnesium can not cause ________________?
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A. Poisoning

B. Salinity

C. Alkalinity

D. Turbidity

100. Aeration holes are provided to reduce the inside saturation pressure ____________________?
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A. In a cippoletti weir

B. In a suppressed weir

C. In all weir

D. In a weir with end contractions