UKPSC JE 2013: Uttarakhand Combined Junior Engineer Selection Examination, JE AGRICULTURAL ENGINEERING (PAPER-II)
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AGRICULTURAL ENGINEERING
PAPER-Il
1. Rate of increase in crop yield per unit increase in water application is known as,
(a) water use efficiency (b) irrigation response
(c) project efficiency (d) gross water requirement
2. Strip cropping systems has alternate rows of
(a) erosion creating and erosion permitting crops
(b) erosion permitting and erosion tolerating crops
(c) erosion permitting and erosion resisting crops
(d) none of the above
3. The removal of excess water from the ground surface is called
(a) ground water flow (b) surface drainage
(c) sub-surface drainage (d) water table control
4. According to U.S. Dept. of Agriculture, the size of particles of coarse sand varies between
(a) 2.Otol.0mm (b) l.0to0.5mm
(c) 0.5 to 0.25 mm (d) none of the above
5. The drip irrigation system is very effective in case of
(a) paddy fields (b) sugarcane fields
(c) orchards (d) all of the above
6. Which of the following is not a permanent structure?
(a) Drop spiliway (b) Chute spiliway
(c) Drop inlet spiliway (d) Contour bund
7. If the depth of flow in a river is 'd', then the average flow velocity occurs at a depth equal
to
(a) 0.4 d from free surface (b) 0.6 d from free surface
(c) 0.2 d from free surface (d) at the free surface
8. Graded bunds are useful in areas where
(a) rainfall is very low (b) rainfall is low
(c) rainfall is high (d) none of the above
9. Due to shrinkage of soil during land grading, the cut-fill ratio should be
(a) greater than one (b) less than one
(c) either of(a) and (b) (d) none of(a) and (b)
10. Advantages of minor irrigation projects are
(a) low cost (b) easily manageable
(c) higher irrigation efficiency (d) all of the above
11. The desired cut or fill at any point can be obtained by comparing
(a) original and proposed elevations
(b) original and surrounding elevations
(c) proposed and surrounding elevations
(d) allof the above
12. Control of soil erosion is vital for
(a) sustenance of agriculture (b) maintaining crop productivity
(c) control of sedimentation (d) all of the above
13. Mulching helps in
(a) controlling soil erosion (b) maintaining soil moisture
(c) controlling weeds (d) all of the above
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14. The drop in case of a straight drop spiliway should not exceed to
(a) 5m (b) 3m
(c) lOm (d) 8m
15. In drip irrigation system, the drippers are equipped on
(a) main line (b) sub-main line
(c) lateral line (d) all above
16. Drip irrigation is also known as
(a) sub-surface irrigation (b) complete irrigation
(c) trickle irrigation (d) surge irrigation
17. Void ratio of soil is also known as
(a) relative density (b) relative porosity
(c) specific gravity (d) none of the above
18. The part of rainfall which becomes part of the water requirement of crops is known as
(a) gross rainfall (b) efficient rainfall
(c) effective rainfall (d) true rainfall
19. The method which estimates evaporation from a free water surface by examining energy
balance at the water surface is
(a) Blaney-Criddle method (b) Dalton method
(c) Penman method (d) None of the above
20. The term extensively used to express the performance of a complete irrigation system or
components of the system is called
(a) irrigation effect (b) irrigation efficiency
(c) irrigation facility (d) irrigation availability
21. Uniformity of water application in sprinkler irrigation is affected by
(a) water temperature (b) wind velocity
(c) soil characteristics (d) time of irrigation
22. Which of the following is a measure for reclamation of alkali soil?
(a) Green manuring with dhaincha in summer
(b) Use of gypsum
(c) Provision of drainage system
(d) All of the above
23. The primary purpose of contour farming in low rainfall areas is
(a) to increase runoff (b) to increase soil loss
(c) to conserve flow energy (d) to conserve rain water
24. Which major nutrient is very soluble and can be expected in drainage effluent?
(a) Nitrogen (b) Phosphorous
(c) Potash (d) None of the above
25. In water-logged areas, when organic matter accumulates in the soil?
(a) Before water logging (b) After water logging
(c) During water logging (d) None of the above
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26. One atmospheric pressure is equal to how many cm of water column?
(a) 1000 cm (b) 1050 cm
(c) 1023 cm (d) 1036cm
27. In which type of soil, the drainage will be poor?
(a) Sandy soils (b) Clayey soils
(c) Silty soils (d) Loamy soils
28. Which of the following is not a salt tolerant crop?
(a) Barley (b) Dhaincha
(c) Gram (d) Spinach
29. Which of the following is not a water lift?
(a) Persian wheel (b) Swing basket
(c) Counterpoise (d) Turbine
30. One horse power is equal to
(a) 724 watts (b) 746 watts
(c) 714watts (d) 764 watts
31. Soil taxonomy deals with which of the following?
(a) Principles of soil productivity (b) Principles of soil erosivity
(c) Principles of soil classification (d) Principles of soil formation
32. Under irregular topographic field conditions which of the following strip cropping system
is preferred?
(a) Contour strip cropping system (b) Field strip cropping system
(c) Buffer strip cropping system (d) Either of the above
33. The value of runoff coefficient normally is
(a) always more than one (b) always equal to one
(c) always less than one (d) any of the above
34. In a field contour lines are obtained by joining the points of
(a) same rainfall (b) same elevation
(c) same erosion (d) same infiltration
35. Gully plugs help in
(a) reducing infiltration (b) reducing flow velocity
(c) reducing sediment deposition (d) reducing percolation
36. Hygrophilic soils are those which
(a) condense water (b) repulse water
(c) release water (d) attract water
37. Seepage force always acts in
(a) only in upward direction (b) opposite direction to flow
(c) in the direction of flow (d) only in the downward direction
38. In the design of a drop structure which of the following force is considered?
(a) Gravitational forces (b) Viscous forces
(c) Frictional forces (d) Drag forces
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39. Straight and parallel contour lines represent
(a) uniformly sloping undulating surface (b) uniformly sloping plane surface
(c) undulating surface (d) none of the above
40. In open channels, the flow is due to
(a) pressure difference (b) elevation difference
(c) velocity difference (d) all of the above
41. Estimation of design discharge is done in
(a) hydraulic design (b) structural design
(c) hydrologic design (d) final design
42. In contour cultivation tillage operations are performed
(a) normal to the contours of the field (b) along the contours of the field
(c) across the contours of the field (d) in any direction
43. Which of the following is not a system of recording levels in the field book?
(a) Height of instrument method (b) Collimation method
(c) Rise and fall method (d) Black and white method
44. Up and down the slope farming results in
(a) minimizing soil erosion (b) increasing soil erosion
(c) improving moisture conservation (d) none of the above
45. Chezy's formula is represented as,
(a) V=R'j5 (b) v=c-J
(c) V = 'JCRS (d) v=s-jI
Where: V = Flow velocity
C = Coefficient
R = Hydraulic radius
S Slope of land
46. The term "EROSIVITY" refers to
(a) erosive time of rain (b) erosive potential of rain
(c) erosive resistance of rain (d) none of the above
47. The critical state of flow occurs when the value of Froude number is
(a) more than one (b) less than one
(c) equal to one (d) all above
48. In an open channel when flow depth at a section changes with time, the flow is said to be
(a) uniform flow (b) unsteady flow
(c) irregular flow (d) critical flow
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49. Unit of Drainage coefficient is 0
(a) kg (b) ton
(c) cm (d) percent
50. Which of the following is not used for gully erosion control?
(a) Check dams (b) Brush dams
(c) Loose rock dams (d) High dams
51. Which of the following is not a mechanical method of erosion control?
(a) Contour fanning (b) Conservation tillage
(c) Free cropping (d) Small dams
52. Which of the following is not a stage of gully development?
(a) Zero stage (b) Formation stage
(c) Development stage (d) Healing stage
53. Which of the following is not a permanent gully control structure?
(a) Contour bund (b) Drop spillway
(c) Permanent check dams (d) Drop (inlet) spillway
54. Which of the following is not a type of soil erosion due to water?
(a) Raindrop erosion (b) Gully erosion
(c) Final erosion (d) Sheet erosion
55. Which of the following is not a process of soil erosion?
(a) Detachment of soil particles (b) Transportation of soil particles
(c) Both of the above (d) Shining of soil particles
56. Which of the following is not a type of soil erosion?
(a) Accelerated soil erosion (b) Geological soil erosion
(c) Water erosion (d) Single erosion
57. Spacing of tile drains is generally kept as
(a) 1-2m (b) 4-5m
(c) 9 — 60 m (d) 70 — 95 m
58. The depth of tile drains in uniformly permeable soil is kept as
(a) 0.25to0.5m (b) 0.75to1.5m
(c) 2.0to3.5m (d) 4.0to5.5m
59. Which method should be used for irrigation in undulating fields?
(a) Flooding method of irrigation (b) Furrow method of in-igation
(c) Check basin method of irrigation (d) Sprinkler irrigation method
60. Which of the following is not a method of surface irrigation?
(a) Free flooding irrigation (b) Border irrigation
(c) Critical irrigation (d) Check basin irrigation
61. Which of the following is not a method ofirrigation?
(a) Drip irrigation (b) Accelerated irrigation
(c) Sub-surface irrigation (d) Pitcher irrigation
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62. Due to evaporation, the liquid water is transferred to
(a) atmosphere (b) river
(c) pond (d) well
63. Over irrigation results in
(a) increasing crop yield (b) maintaining soil fertility
(c) economic utilization of water (d) none of the above
64. Efficient irrigation to the crops will provide
(a) increased crop yield (b) increased water logging
(c) increased salt accumulation (d) none of the above
65. Water conveyance efficiency is related to which of the following?
(a) Water stored in the root zone (b) Water needed in the root zone
(c) Uniformity of the water applied (d) None of the above
66. Water distribution efficiency indicates
(a) water supplied at source
(b) water delivered at field
(c) average depth of water stored during irrigation
(d) none of the above
67. To which of the following the 'duty' of water is related?
(a) Quantity of water used (b) Area to the irrigated
(c) Height of crop (d) None of the above
68. The Lysimeter is used to determine
(a) Sun shine hours (b) Wind velocity
(c) Flow velocity (d) Evapotranspiration
69. Discharge of water as vapour into atmosphere by leaves and stems of living plants is
called
(a) evaporation (b) consumptive use
(c) transpiration (d) none of the above
70. Evaporation pan is made of
(a) brass (b) cast iron
(c) mild steel (d) none of the above
71. Diameter of a commonly used evaporation pan is
(a) 65 cm (b) 75 cm
(c) 95cm (d) 120cm
72. Which of the following is not related to wind erosion?
(a) Speed of wind (b) Age of the soil
(c) Moisture content of soil (d) Texture of soil
73. Which of the following is not a drainage system?
(a) Drip system (b) Surface system
(c) Sub-surface system (d) All of the above
74. Which of the following is not a component of a drip irrigation system?
(a) Head unit
(b) Perforated pipe
(c) Water conveyance and distribution pipes
(d) Drippers
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75. In which country the drip irrigation system was originally developed?
(a) India (b) Pakistan
(c) Israel (d) China
76. Which of the following is not a component of a sprinkler irrigation system?
(a) Pump (b) Sprinkler nozzle
(c) Main and lateral pipe lines (d) Drip nozzles
77. The rate of evaporation of water does not depend on
(a) temperature of water
(b) temperature of air in contact with water
(c) humidity of air
(d) depth of water
78. Evaporation process is a process.
(a) chemical (b) biological
(c) physical (d) none of the above
79. Evaporation is the process of
(a) condensation (b) vaporization
(c) conduction (d) radiation
80. Unitof'delta'is
(a) cubic meter (b) square meter
(c) hectare (d) meter
81. The water requirement of a crop is mainly estimated for
(a) crop planning on the farm (b) determining transpiration
(c) determining water loss (d) none of the above
82. The depth of a commonly used evaporation pan is
(a) 20 cm (b) 50 cm
(c) 100 cm (d) 150 cm
83. The permissible mean flow velocity in an earthen channel in sandy loam soil is
(a) 40 cm/sec (b) 60 cm/sec
(c) 80 cm/sec (d) 100 cm/sec
84. A significant soil building crops group is
(a) cereal crops (b) leguminous crops
(c) fodder crops (d) fruit crops
85. Border slope for clay to clay loam soils is kept generally
(a) 0.05 to 0.20 % (b) 0.20 to 0.40 %
(c) 0.25 to 0.65 % (d) none of the above
86. The first step in planning a terrace system is the selection of
(a) Inlet location (b) Terrace slope
(c) Watershed area (d) Outlet location
87. One hectare is equal to
(a) 1000m2 (b) lOOm2
(c) 10000 m2 (d) 10 m2
88. Rational formula is used to estimate
(a) peak flow rate (b) average flow rate
(c) uniform flow rate (d) free flow rate
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89. Mannings formula is used to determine
(a) peak flow rate (b) flow velocity
(c) return period (d) time of peak
90. Chezy's formula is used to determine
(a) flow direction (b) flow velocity
(c) flow duration (d) none of the above
91. Temporary gully control structures are designed for a recurrence interval of
(a) upto 10 years (b) upto 8 years
(c) upto 15 years (d) upto 20 years
92. Primary cause of failure of permanent gully control structures is
(a) Insufficient hydraulic capacity (b) Insufficient flow velocity
(c) Both of the above (d) None of the above
93. Spacing of mole drains ranges between
(a) 0.5tol.0m (b) 20to25m
(c) 10 to 15 m (d) 1.5 to 9 m
94. In heavy rainfall areas which type of bench terraces should be preferred?
(a) Level benches (b) Slopping outward benches
(c) Sloping inward benches (d) None of the above
95. Drainage coefficient is defined as the depth of water in centimetre drained from any area
in
(a) 12 hours (b) 18 hours
(c) 06 hours (d) 24 hours
96. Most important factor influencing the value of drainage coefficient is
(a) crop (b) field size
(c) rainfall (d) none of the above
97. Collector drains must have their diameter
(a) Larger than lateral drains (b) Less than lateral drains
(c) Equal to lateral drains (d) None of the above
98. Sub-surface drainage system includes
(a) drainage outlet and collector drains only
(b) drainage outlet and laterals only
(c) drainage outlet, collectors and laterals
(d) none of the above
99. Universal Soil Loss Equation (USLE) is used to calculate
(a) average annual soil loss (b) average weekly soil loss
(c) average daily soil loss (d) average monthly soil loss
100. The satisfactory operating pressure for a sprinkler system ranges between
(a) 1.0-1.5kg/cm2 (b) 1.5-2.5kg/cm2
(c) 2.5 — 3.5 kg/cm2 (d) 3.5 — 4.0 kg/cm2
101. The common size of screen opening for a tube well is
(a) lessthanl.5mm (b) l.5mmto5.0mm
(c) 5.0mm to 7.5mm (d) 10.0 mm to 15.0mm
102. One cubic meter volume is equal to
(a) 10 litre (b) 1000 litre
(c) 100 litre (d) 10000 litre
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103. The vertical interval of a terrace system does not depend on
(a) land slope (b) crop height
(c) surface topography (d) soil type
104. The longitudinal slope in a terrace is kept as
(a) 0.75 % (b) 1.50 %
(c) 2.50% (d) 10.0%
105. Weirs are classified based on
(a) shape of the notch only (b) type of the crest only
(c) both (a) and (b) (d) none of the above
106. Minor irrigation schemes include
(a) land reclamation schemes (b) surface water irrigation scheme
(c) ground-water irrigation scheme (d) both (b) and (c)
107. The flow rate from a canal outlet depends on
(a) size of outlet opening only (b) head of water above outlet only
(c) both above (d) none of the above
108. Ponds are small water storage structures used for
(a) Water supply only (b) Ground-water recharge only
(c) Irrigation only (d) All of the above
109. The water table in an unconfined aquifer depends on
(a) permeability of soil only (b) pumpage from well only
(c) area of recharge only (d) all of the above
110. Water required by the border strip is 42.86 cubic meter, if the discharge available is
36 m3/hr, then the time required to irrigate the border will be
(a) 4.19 hour (b) 3.19 hour
(c) 2.19 hour (d) 1.19 hour
111. If the weight of moist soil is 1.18 kg and the weight of dry soil is 1 kg, then the moisture
content of soil on dry weight basis will be,
(a) 0.0018% (b) 1.8%
(c) 0.018 % (d) 18%
112. The amount of silt and clay in a sandy loam soil is
(a) morethan30% (b) more than 20%
(c) morethan50% (d) more than 40%
113. The average moisture extraction by plants from the first 25% of soil depth is
(a) 50% (b) 45%
(c) 40% (d) 35%
114. The drainage area above the top most terrace is generally kept
(a) 4.0 hectare (b) 10.0 hectare
(c) 2.0 hectare (d) 1.0 hectare
115. Emitter pipes are classified based on pressure rating into
(a) two classes (b) three classes
(c) four classes (d) five classes
116. The material of emitting pipes should be resistant to
(a) Fertilizers (b) Chemicals
(c) Both (a) and (b) (d) None of the above
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117. Water application rate from sprinkler system depends on I
(a) discharge of sprinider only (b) sprinkler spacing only
(c) lateral movement speed (d) all of the above
118. Earth work for bench terrace is calculated by
bows 100WS
(a)
8 15
100 +WS
(c) (d) None of the above
8
Where, W = width of terrace, m
S = land slope, %
119. In irrigated regions, water logging of low lands is due to
(a) seepage from canals
(b) seepage from unlined irrigation channels
(c) both of the above
(d) none of the above
120. Open drains have disadvantage because
(a) devide farm area into fragments.
(b) interfere with the movement of machinery.
(c) waste considerable area of the farm.
(d) all above
121. Depth of deep tube wells is kept as,
(a) 20m (b) 40m
(c) 60 m (d) 100 m or more
122. The gully development is accomplished under how many stages?
(a) Only two stages (b) Only three stages
(c) Only four stages (d) Only five stages
123. Which of the following is due to wind erosion?
(a) Delta (b) Sea coast
(c) Sedimentation (d) Sand dune
124. Gully erosion is an advanced stage of
(a) Sheet erosion (b) Channel erosion
(c) Splash erosion (d) Rill erosion
125. Sprinklers are lubricated by
(a) oil (b) grease
(c) oil and grease (d) water
126. The Planirneter measures
(a) area (b) volume
(c) density (d) land roughness
127. A well screen is used in
(a) open well (b) cavity well
(c) tube well (d) none of the above
128. The recorded description of materials encountered in sequence throughout drilling with
reference to the distance from the ground surface is known as,
(a) well log (b) well casing
(c) well depth (d) well description
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129. Culturable command area for a minor irrigation project is I
(a) more than 10000 hectare (b) more than 5000 hectare
(c) upto 5000 hectare (d) upto 2000 hectare
130. Small watershed are those in which
(a) runoff is predominant (b) overland flow dominates the runoff
(c) base flow predominant (d) all of the above
131. The difference in moisture content of the soil between field capacity and permanent
wilting point is known as,
(a) capillary water (b) hygroscopic water
(c) percolation water (d) available water
132. Sprinkler irrigation method can be preferably used
(a) in places with high wind velocity.
(b) for clay soil with very low infiltration rate.
(c) for soils with heavy texture and low infiltration rate.
(d) for soils with light texture and high infiltration rate.
133. Contour trenching should be done in
(a) winter season (b) summer season
(c) throughout the year (d) none of the above
134. If the net amount of irrigation is 10 cm and the field irrigation efficiency is 80%, the gross
amount of water applied is
(a) 10.66cm (b) 12.50cm
(c) 8.0 cm (d) 800 cm
135. Mole drains are underground unlined circular or oval earthen channels formed by a mole
plough in
(a) sandy-loam soils (b) non-cohesive soils
(c) sandy soils (d) cohesive soils
136. A drainage canal draining 250 hectare area has a discharge of 0.3 m3/s, the drainage
coefficient of the area will be
(a) 0.7 cm (b) 1.036 cm
(c) 1.412 cm (d) 2.178 cm
137. Wind erosion is more in
(a) cohesive soils (b) non-cohesive soils
(c) rocky soils (d) wet soil
138. In splash erosion, the raindrop energy acts in the form of
(a) kinetic energy (b) potential energy
(c) chemical energy (d) none of the above
139. The property of rainfall which mainly affects the soil erosion is
(a) direction of rainfall (b) time of rainfall
(c) form of rainfall (d) intensity of rainfall
140. Which of the following soil property is mainly affected by wind erosion?
(a) Soil texture (b) Soil structure
(c) Soil temperature (d) Soil moisture
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141. If 'B' is the soil loss due to water erosion and '1' is the slope length, then which of the
following statement is true?
(a) Ecl2 (b) Ecc[1
(c) Eocl3 (d) Eccl
142. Which of the following phase is more significant to cause soil erosion?
(a) Transportation of particles (b) Detachment of particles
(c) Deposition of particles (d) Abrasion of particles
143. The 'gabion' is constructed by using which material?
(a) Vegetative materials (b) R.C.C.
(c) Brick mortar (d) Wire-net and stones
144. To determine moisture content of a soil, the soil is kept in oven for 24 hours at the
temperature of
(a) 100°C (b) 105 °C
(c) 110°C (d) 120 °C
145. Check dams help in
(a) decrease in flow velocity (b) minimize channel erosion
(c) increase infiltration of water (d) all of the above
146. The depth of a most efficient rectangular channel is how many times of its width?
(a) 2.0 times (b) 0.75 times
(c) 0.5 times (d) 1.5 times
147. Evapotranspiration can be measured by using which of the following instrument I
equipment?
(a) Current meter (b) Lysimeter
(c) Coshocton wheel (d) Stage recorder
148. The relation between the area irrigated and the quantity of water used to irrigate it for the
purpose of maturing its crop is known as,
(a) irrigation frequency (b) irrigation period
(c) irrigation requirement (d) duty of water
149. Irrigation is necessary for which of the following?
(a) Prosperity (b) Poverty
(c) Famine (d) None of the above
150. The water which can be removed by drainage is
(a) hygroscopic water (b) gravitational water
(c) capillary water (d) perched water
151. Which of the following trees can be used for bio-drainage work?
(a) Mango (b) Eucalyptus
(c) Guava (d) Sisal
152. In tile drain installation, the envelope material is required for
(a) increasing the flow rate (b) increasing the life of tile drains
(c) increasing the strength of tile drains (d) decreasing the length of tile drains
153. Which of the following is the surface drain?
(a) Mole drain (b) Tile drain
(c) Vertical drain (d) Open ditch drain
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154. The prismoidal formula is used to determine I
(a) runoff rate (b) earthwork volume
(c) land slope (d) infiltration rate
155. Which of the following is not a land grading method?
(a) Profile method (b) Laser method
(c) Trapezoidal method (d) Plane inspection method
156. Four point method is used to determine
(a) earthwork volume (b) cross slope
(c) longitudinal slope (d) volume of water
157. Water meter is used to measure
(a) flow rate in streams (b) flow rate in pipes
(c) water volume storage (d) water energy
158. One ha-cm volume of water is equal to
(a) 10m3 (b) lOOm3
(c) 1000m3 (d) 10000 m3
159. The pressure head in a sprinider system is converted into velocity head at the
(a) sprinkler head (b) sprinkler jet
(c) nozzle (d) riser head
160. A soil solution with its pH value as 7.0 indicates that
(a) soil is saline (b) soil is acidic
(c) soil is alkaline (d) soil is neutral
161. The discharge of emitters in a drip irrigation system usually ranges between
(a) 2 to 10 litre/hour (b) 2 to 10 litre/second
(c) 120 to 200 litre/hour (d) 50 to 75 litre/hour
162. For drainage of land with concave surface or a valley at the centre, the most suitable
drainage system is
(a) Herringbone system (b) Bedding system
(c) Random system (d) Gridiron system
163. In water logged lands, the soil pores are saturated
(a) within a depth of 30 cm (b) within a depth of 40 cm
(c) within a depth of 60 cm (d) beyond root zone of a crop
164. Removal of thin and fairly uniform layer of the soil from the land surface by runoff water
is called as,
(a) torrent erosion (b) sheet erosion
(c) glacial erosion (d) uniform erosion
165. A high intensity rainfall causes severe erosion because of
(a) greater detachment of soil particles only
(b) more runoff generation only
(c) better transportation of eroded soil only
(d) all of the above
166. Which of the following aspects are kept in consideration while designing a drop structure?
(a) Hydrologic (b) Hydraulic
(c) Structural (d) All above
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167. Contour bunds are recommended in the areas where
(a) rainfall is low (b) rainfall is high
(c) soil is heavy (d) none of the above
168. The period for which water is supplied from canal to a crop is called
(a) base (b) duty
(c) delta (d) irrigation period
169. Arrangement of soil particles in a soil mass is called
(a) soil texture (b) soil structure
(c) infiltration (d) particle density
170. The factor which affects irrigation efficiency is
(a) design of irrigation system (b) degree of land preparation
(c) skill and ease of irrigation (d) all of above
171. To carry irrigation channels across the road, the appropriate structure is
(a) culvert (b) siphon
(c) spiliway (d) all above
172. In an open channel water flows under the influence of
(a) gravity force (b) inertia force
(c) suction force (d) none of the above
173. Pan evaporation data are recorded
(a) twice daily (b) thrice daily
(c) once daily (d) once a week
174. For a given cross sectional area of channel, the hydraulic radius decreases with
(a) increase in wetted perimeter (b) decrease in wetted perimeter
(c) decrease in flow velocity (d) increase in flow velocity
175. The most efficient section of open channel is
(a) semicircular (b) triangular
(c) trapezoidal (d) parabolic
176. Tensiometers are used to measure
(a) soil organic matter (b) flow depth
(c) flow velocity (d) soil moisture
177. The common water distribution pattern used in canal command areas of northern India is
(a) shejpali system (b) tail to tail system
(c) warabandi system (d) all above
178. Runoff coefficient depends on
(a) nature of soil surface (b) type of land use
(c) rainfall intensity (d) all the above
179. Free board is provided to prevent the embankment against
(a) overtopping (b) sliding
(c) overturning (d) all above
180. The agronomic measures increase infiltration rate and thereby there is
(a) reduction in runoff (b) increase in soil erosion
(c) formation of gullies (d) none of the above
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Source: Uttarakhand Public Service Commission. Question paper published by Uttarakhand Public Service Commission.