UKPSC JE 2013: Uttarakhand Combined Junior Engineer Selection Examination, JE CIVIL ENGINEERING (PAPER-Il)
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CIVIL ENGINEERING
Paper— II
1. 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
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. In a gravity dam, the shear friction factor against sliding should be
(a) I (b) 2 (c) 3 to 4 (d) more than 5
11. The instrument used for accurately measuring velocity of water is
(a) venturimeter (b) Pitot tube (c) Orifice meter (d) Anemometer
12. 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)
13. Under which of the following conditions will the equation + + z = consant be valid
in a flow field:
1. Flow is rotational. 2. Flow is irrotational.
3. Flow is incompressible. 4. Flow is steady 5. Flow is laminar.
Select the correct answer:
(a) 1, 3 and 5 (b) 2, 4 and 5 (c) 1,3and4 (d) 2,3and4
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14. Two small circular orifices of diameters d1 and d2 are placed on one side of a tank at
depths of 25
cm and I m respectively below a constant-sufface of water. If the discharges
through the orifice are the same, then the ratio of the diameters d 1 and d2 will be
(a) I 2 (b) 1: (c) :I (d) 2 : 1
15. 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
16. A drop in canal bed is gerierally 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.
17. 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
18. 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 %
19. 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
20. 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
21. 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
22. 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
23. Irrigation is basicallyrequired in
(a) Humid regions (b) Arid regions
(d) All of the above
(c) Semi-and rons
geological formation which contains and readily yiclds water is called
24. çie (b) aquifuge (not containing water)
(a) aquifer (d) aquiclude
(c) aquita1
to do any direct irrigation, is called
WhiCh t5 flOt sUpP0
25. The C3fl2tI (b) watercourse
(a) main canal
dis(ribUt& (d) minor distributary
major
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26. The relation between duty - —
period B in days is given by
1.98 B 8.64B
(a) A= D (b)
5.68 B
(c) (d)
D
27. A rain-gauge should preferably be fixed
(a) in an open space (b) in a closed space
(c) near the building (d) under the tree
28. Which of the following is not a recording rain-gauge?
(a) Tipping bucket type (b) Simon's rain-gauge
(c) Floating type (d) Weighing bucket type
•29. Sprinkler irrigation is preferred when
(a) the ground is undulating (b) the crop has shallow roots
(c) the irrigation water is scarce (d) All of the above
30. If specific yield of a particular sand is 30% and its porosity is 50%, then the specific
retention of the sand will be
(a) 80 % (b) 55 % (c) 40 % (d) 20 %
31. For a well, founded in a confined aquifer, if the draw-down is doubled, the discharge 'Q'
will become
(a) 0,5Q (b) 1.5Q (c) 2.OQ (d) 3.OQ
32. The water available in unit volume of an aquifer is called
(a) specific storage (b) specific retention
(c) specific yield (d) None of the above
33. In which stage of river flow, its bed is having maximum slope?
(a) Mountainous stage (b) Boulder stage
(c) Trough stage (d) Delta stage
34. A repelling groyne is aligned
(a) pointing upstream (b) pointing downstream
(c) perpendicular to bank (d) parallel to bank
35. The elementary profile of a dam is
(a) a rectangle (b) a trapezoidal
(c) an equilateral triangle (d) a right angled triangle
36. Seepage through foundation in an earthen dam is controlled by providing
(a) rock-toe (b) horizontal blanket
(c) impervious cut-off (d) chimney drain
37. For the upstream face of an earthen dam, the most adverse condition for stability of slope is
(a) sudden drawdown (b) steady seepage
during construction (d) sloughing of slope
(c)
36. The major resisting force in a gravity dam is
water pressTe (b) self weight of dam
(a wave (d) uplift pressure
çcj pressure
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39. The ratio of pressures between the points A and B located at depths 0.5 m and 2.0 m
respectively below a constant level of water in a tank is
(a) l:sJ (b) 1:2 (c) 1:4 (d) 1:16
40. The total pressure on a plane surface submerged in a liquid and inclined at an angle 0 with
the horizontal will be
(a) p.A (b) p.A. sin 9 (c) p.A. cos 9 (d) p.A.tan 9
Where p is pressure intensity at centroid of area and A is area of plane surface.
41. The relation between Manning's 'n' and Chezy's 'C' is given by
R R23
(a) C= — (b) C= —
R''3
(c) C--- (d) C—
Where R= hydraulic mean depth
42. Study the following statements:
(i) Levees are constructed parallel to the river flow.
(ii) Spurs are constructed parallel to the river flow.
(iii) Levees are constructed transverse to the river flow.
(iv) Spurs are constructed transverse to the river flow.
The correct answer is
(a) (iii) and (iv) (b) (iv) and (i) (c) (i) and (ii) (d) (ii) and (iii)
43. Equation of continuity is based on the principle of conservation of
(a) mass (b) energy
(c) momentum (d) none of the above
44. The losses are more in
(a) laminar flow (b) transition flow
(c) turbulent flow (d) critical flow
45. Due to each end contraction, the discharge of rectangular sharp-crested weir is reduced by
(a) 5% (b) 10% (c) 15% (d) 20%
46. For the same mean velocity, the ratio of head loss per unit length for a pipe flowing full to
that for the same pipe flowing half full would be
(a) 2.0 (b) 1.63 (c) 0.5 (d) 0.61
47. The head loss in a pipe of diameter d, carrying oil at a flow rate Q over a distance 1 is h.
This pipe is replaced by another with half the diameter, all other things remaining same,
the head loss in this case would be
(a) 0.5 h (b) 2.0 h (c) 8.0 h (d) 32.0 h
48. A Kaplan turbine is a
(a) low head turbine (b) medium head turbine
(c) high head turbine (d) None of the above
49. The net speed under which the turbine reaches its peak efficiency is called
(a) design speed (b) rated speed
(d) operating speed
(c) gross speed
50. DickCfl'S formula for determining maximum flood (with usual notation), is
b) Q = C 1 A213 (c) Q = C\Ji (d) Q1 = l77p
(a) 0,, = CA 3' 4
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•51. With the increase in supplied irrigation water, the yield of crops
(a) increases continuously
(b) increases upto a level and then decreases
(c) increases upto a level and then becomes constant
(d) decreases continuously
52. Classification of canals on thebasis of alignment is
(a) contour canal (b) watershed canal
(c) side slope canal (d) All of the above
53. A ridge canal is also called a
(a) watershed canal (b) contour canal
(c) side slope canal (d) None of the above
54. The Garret diagrams are based on
(a) Lacey's theory (b) Khosla's theory
(c) Bligh's theory (d) Kennedy's theory
55. Main functions of headworks are
(a) to regulate the intake of water into the canal
(b) control silt entry
(c) both (a) and (b)
(d) None of the above
56. Which of the following is not the part of diversion headworks?
(a) Barrage (b) Divide wall
(c) Head regulator (d) Distributary
57. 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
58. Main parts of regulation works are
(a) canal falls (b) head regulator
(c) cross regulator (d) All of the above
59. Canal outlets are also called
(a) Canal escapes (b) Canal modules
(c) Canal offlakes (d) Canal openings
60. Cross-drainage work, when bed level of river and canal are same, is known as
(a) level crossing (b) aqueduct
(c) super passage (d) None of the above
61. The base width of a concrete dam, in comparison to an earthen dam, is
(a) almost equal (b) much larger
(c) much smaller (d) None of the above
62. Which of the following does not contribute to water-logging?
(b) Excessive tapping of water
(a) Inadequate drainage (d) Frequent flooding
(c) Seepage from unlined canals
The most important flood control measure which can be used in isolation for protecting a
63.
ma301 city will be
(a) storage reservoir
fz5craQC1Ofl of terraces
(c) conservation measures in the upper catchment
(ci) flood enibankments
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•64. Method of pricing irrigation water is
(a) flat rate pricing (b)
(c) both (a) and (b) volumetric method of pricing
(d) None of the above
65. River training works may be classified as
(a) training for discharge (b) training for depth
(c) training for sediment (d) All of the above
66. Ram Ganga project is situated in
(a) Uttar Pradesh (b) Uttarakhand
(c) Haryana (d) Himachal Pradesh
67. An ideal fluid is defined as the fluid which is
(a) incompressible and non-viscous (b) compressible
(c) incompressible (d) compressible and viscous
68. 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
69. Notch is used in any tank or channel for measurement of
(a) velocity (b) pressure
(c) discharge (d) energy
70. 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
71. The soil becomes practically infertile when its pH value is about
(a) 0 (b) 7
(c) 11 (d) None of the above
72. Evaporation is measured by using
(a) an open pan (b) lysimeter
(c) infiltrometer (d) a neutron tube
73. The plot between rainfall intensity and time is called
(a) mass curve (b) hyetograph
(c) isohyetal line (d) hydrograph
74. The optimum depth of Kor watering for rice crop is
(a) 13cm (b) 16cm (c) 19cm (d) 22cm
75. 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
76. The ratio of actual discharge ofajet 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
if
the density of a fluid changes from point to point in a flow region, it is called
77.
/))) '2 (b) unsteady flow
çj flOfl-Uhiform flow (d) compressible flow
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78. 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
79. 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)
80. 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 ofthe above
81. The range for coefficient of discharge (C(j) for a venturimeter is
(a) 0.6to0.7 (b) 0.7to0.8 (c) 0.8to0.9 (d) 0.95 to 0.99
82. 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
83. 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
84. 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
85. 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
86. The head loss due to sudden expansion is given by (with usual notations)
7 7 7 / 7
(v1 -v7) v1 —v, (v1 - v7 )- (v1 - v2)2
(a) (b) (d)
2g 2g (c) . 2g ) g
87. Which of the following is not a cash crop?
(a) Jute (b) Tea (c) Rice (d) Sugarcane
88. The minimum freeboard recommended for lined canal carrying discharge greater than
to m31s, is
(a) 0.15 in (b) 0.60 m (c) 1.25 m (d) 0.75 m
89. 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
90. Fish ladder is provided on the side of
(a) divide wall (b) diaphragm wall
(c) core wall (d) wing wall
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91. 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
92. A core wall is provided in a/an
(a) gravity dam (b) earthen dam
(c) canal regulator (d) aqueduct
93. Water logging is eliminated by
(a) deep ploughing (b) shallow ploughing
(c) providing drains (d) irrigation
94. The most economical central angle of an arch dam is
(a) 930 (b) 123° (c) 133° (d) 183°
95. Lacey's regime theory was developed after extensive research in
(a) India (b) Israel
(c) Indonesia (d) Iraq
96. 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
97. Bhakra dam is a/an
(a) non-rigid gravity dam (b) buttress dam
(c) gravity darn (d) arch dam
98. Lysimeter is used for measuring
(a) infiltration (b) evaporation
(c) vapour pressure (d) evapo-transpiration
99. Reynold's number for groundwater flow varies from
(a) below 1 (b) I to 10
(c) lOto 15 (d) 15to20
100. The removal of air by filling the pump with water is called
(a) priming (b) de-aerating
(c) sterilizing (d) None of the above
101. When two centrifugal pumps are operated in series, the discharge
(a) increases (b) decreases
(c) remains constant (d) initially increases, then decreases
102. The expression Q = KIA (with usual notations) represents
(a) Rational formula (b) Darcy's law
(c) Manning's formula (d) Lacey's equation
103. Lacey's theory is applicable to flow
(a) through pipes (b) in concrete lined channels
(c) over spiliways (d) in alluvial rivers and canals
104. Which of the following has maximum water application efficiency?
(a) Surface irrigation (b) Lift irrigation
(c) Sprinkler irrigation (d) Furrow irrigation
105. Hydraulic radius R is defined (with usual notations) as
(a) A/P (b) P/A (c) A/n (d) None of these
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106. The outlet discharge factor is the duty at the head of
(a) main canal (b) branch canal (c) distributary (d) water course
107. 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
108. 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
109. Outlet discharge, for a particular crop, is given by
(a) outlet factor/area (b) arealoutlet factor
(c) area x outlet factor (d) None of the above
110. 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
111. 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
112. The relation given by Kennedy for critical velocity V0 (in m/s) is
(a) V0 = 0.84 m D°84 (b) V0 = 0.84 m
(c) V0 = 0.55 m DOM (d) V0 = 0.64 m D°55
Where m = critical velocity ratio
D = depth of water in m
113. Lacey's perimeter (P) — discharge (Q) relation is given as
(a) P=2.25Q"2 (b) P=4.75Q 2
(c) P = 2.25 Q312 (d) P = 4.75 Q3"2
114. 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
115. The major resisting force for a gravity dam is
(a) water pressure (b) wave pressure
(c) self weight of the dam (d) uplift pressure
116. 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
117. The discharge per unit drawdown of a well, is called
(a) specific storage (b). specific yield
(c) specific capacity (d) None of the above
118. The wetted perimeter of a regime channel for a discharge of 64 m3/s, as per Lacey's
theory, will be
(a) 19m (b) 38m (c) 57m (d) 76 m
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119. The water pressure per metre length on a vertical masonry wall of a dam will be
(a) w H/2 (b) wH (c) wH2/4 (d) wH2/2
Where w = specific weight of water
H = height of the wall
120. 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
121. 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
122. 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
123. 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
124. 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
125. 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
126. 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
127. The discharge over a rectangular notch is
(a) inversely proportional to H2t3 (b) directly proportional to H312
(c) inversely proportional to H2t5 (d) directly proportional to H5t2
Where H = height of liquid above the sill of the notch.
128. A weiris 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
129. In a centnfiigal pump, the liquid enters the pump
(a) at the centre (b) at the bottom
(c) at the top (d) from sides
130. The pump, suitable for small discharge and high head, is
(a) centrifugal pump (b) axial flow pump
(c) mixed flow pump (d) reciprocating pump
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131. The theoretical power (in h.p.) required to drive a reciprocating pump is
wQ (H + Hd) wQH wQHd wQH
(a) (b) (c) (d) 60
Where w = specific weight of liquid to be pumped
Q = discharge of the pump in rn3/s
H = suction head in m
Hd = delivery head in m
132. 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
133. 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
134. 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
135. In a Francis turbine runner, the number of blades are generally between
(a) 2to4 (b) 4to8 (c) 8to 16 (d) 16to24
136. In a Kaplan turbine runner, the number of blades are generally between
(a) 2to4 (b) 4to8 (c) 8to 16 (d) 16to24
137. 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
138. Flood waters of nvers are sometimes diverted through canals, called
(a) feeder canals (b) inundation canals
(c) perennial canals (d) carrier canals
139. According to Reyve's formula for estimating floods, the peak discharge is proportional to
(a) A (b) A2'3 (c) A3'4 (d) A112
Where A = Area of the catchment basin.
140. When the crest length of the weir equals the width of the channel, on which water flows,
the number of end contractions 'n' in Francis formula will be
(a) 1 (b) 2 (c) 4 (d) zero
141. The velocity of drainage water in the barrels of syphon aqueduct is normally limited to
(a) I to 2 rn/sec (b) 2 to 3 m/sec
(c) 3 to 4 mlsec (d) 4 to 5 rn/sec
142. The best method for measuring the velocity of flow in rivers is
(a) Pitot tube method (b) Surface float method
(c) Velocity rod method (d) Current meter method
143. The lower limit of factor of safety against overturning in a gravity dam is
(a) 2.0 (b) 1.75 (c) 1.50 (d) 1.25
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144. Yield of a slotted tube well as compared to yield of strainer tube well is
(a) low (b) more
(c) equal (d) None of the above
145. Which of the following is a bank protection measure?
(a) Brick pitching (b) Stone rip-rap
(c) Concrete slab lining (d) All of the above
146. The average particle size of the silt in mm is 'd', then Lacey's silt factor 'f is proportional
to
(a) d2 (b) d1 /2 (c) d/'2 (d) d"3
147. The coefficient of roughness for an earthen canal, in excellent condition, is taken as
(a) 0.01 (b) 0.0225 (c) 0.025 (d) 0.7
148. Shrouding is provided in
(a) cavity type tubewell (b) slotted type tubewell
(c) strainer type tubewell (d) None of the above
149. The critical depth in a channel can be produced by
- (a) decreasing the width of the channel
(b) increasing the width of the channel
(c) increasing the side slope of the channel
(d) decreasing the side slope of the channel
150. The nodal agency for flood forecasting in India, is
(a) Ministry of Home Affairs (b) Ministry of Agriculture
(c) Ministry of Earth Sciences (d) Central Water Commission
151. Alkaline soils are reclaimed by
(a) leaching only (b) addition of gypsum and leaching
(c) addition of gypsum only (d) provision of drainage
152. Dicken's formula for high flood discharge is used for the catchrnents in
(a) Eastern India (b) Western India
(c) Northern India (d) Southern India
153. Thickness of concrete lining for a canal is governed by
(a) requirement of imperviousness
(b) requirement of imperviousness and structural strength
(c) thumb rule for providing nominal thickness
(d) canal bank slope
154. 8 m3/s discharge flows through 4 m wide rectangular channel at a velocity of 2 rn/s. The
hydraulic mean radius of the channel is
(a) 3/2 m (b) 2/3 m (c) 1 m (d) 4 m
155. A triangular channel is hydraulically most economical when each of its sloping sides is
inclined to the vertical at an angle of
(a) 300 (b) 60° (c) 450 (d) 750
156. As per Lacey's theory, the wetted perimeter of a regime-channel for a discharge of
100 m3/s, is
(a) 87.5 m (b) 67.5 m (c) 47.5 m (d) 42.5 m
157. The ratio of irrigated area under Rabi and Kharif crops is called
(a) Overlap ratio (b) Crop ratio
(c) Kor ratio (d) Rotation ratio
0
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158. As per recommendations of indian standards, the shape of lined canal is
(a) trapezoidal (b) semi-circular (c) parabolic (d) elliptical
159. As compared to gravity dams, earthen dams
(a) are costlier (b) are less susceptible to failure
(c) require sound rock foundation (d) require less skilled labour
160. The ratio of base width 'b' to height 'h' of an elementary profile of a gravity dam, from
'no tension' consideration, is given by
(a) (c) (d)
G—K (b) (G — K) (G — K) (G2 — K2)
Where G = specific gravity of dam material
K = uplift pressure intensity and
= coefficient of friction
161. Coefficient of velocity for an orifice is given by (with usual notations):
2Vc V V
(a) (b) (c) (d)
162. An artesian aquifer is the one where
(a) water surface under the ground is at atmospheric pressure
(b) water is under pressure between two impervious strata
(c) water table serves as upper surface of zone of saturation
(d) None of the above
163. At a sudden contraction in a horizontal pipe
(a) total energy decreases (b) velocity head increases
(c) pressure head decreases (d) All of the above
164. if the duty of water for a crop of base period 120 days is 1400 hect./cumec, then delta ()
for the crop is
(a) 741 mm (b) 843 mm (c) 949 mm (d) 1056 mm
165. The standard Symons' type raingauge has a collecting diameter equal to
(a) 5.08 cm (b) 10.0 cm (c) 12.7 cm (d) 25.4 cm
166. Irrigation water having SAR value of 20, is called
(a) very high sodium water (b) high sodium water
(c) medium sodium water (d) low sodium water
167. Cross-regulators in main canal are provided to
(a) regulate water supply in the off-taking channel
(b) regulate water supply in the main channel
(c) regulate excessive flood water
(d) head up water for adequate supply into the off-taking channel
168. A pump is a device which converts
(a) hydraulic energy into mechanical energy
(b) mechanical energy into hydraulic energy
(c) kinetic energy into mechanical energy
(d) None of the above
169. 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
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170. The discharge through a triangular notch is given by (with usual notations):
(a) Q = Cd tan x (b) Q = Cd . tan x H52
(c) Q = Cd tan X \J. H3' (d) None of the above
171. The discharge through a rectangular notch (with usual notations) is given by
(a) C. LH312 (b) jCd . LH32 (c) LH5'2 (d) . LH5'2
172. 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
173. The discharge through a large rectangular orifice is
(a) Cd . b -.J ('jiii --/iui) (b) Cd . (H 2 — H 2)
(c) Cd . b s,J (H 2 — H'2) (d) None of the above
Where b = Width of the orifice
H1 = height of the liquid above top edge of orifice
H2 = height of liquid above bottom edge of orifice
Cd = coefficient of discharge
174. The discharge through a venturirneter is given as (with usual notations):
(a) Q = Cd A AJ /jA—A (b) Q = Cd A 1 A, -sJi /.\j2A A
(c) Q=CdAI A2 \/\jA_A (d) Noneoftheabove
175. The capillary rise or fall of a liquid is given by (with usual notations):
(a) h=ocosO/4pgd (b) h=4cosO/pgd
(c) h = 8 cos 0/ p g d (d) None of the above
176. 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
177. 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
178. 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
179. In lift irrigation, the flow is
(a) by gravity (b) from lower level to higher level
(c) by percolation (d) through sprinkler head
180. 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
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Space For Rough Work /fT31TTW
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Source: Uttarakhand Public Service Commission. Question paper published by Uttarakhand Public Service Commission.