Water Resources Engineering

CE5I

22501

1   Choose incorrect statement from the following statements
    (A)   Reservoirs can be used to generate the hydroelectric power.
    (B)   Water logging increases the fertility of soil and increases useful cultrable land
    (C)   Flood control is also one of the objectives of the reservoirs.
    (D)   Irrigation helps in increasing the yield of the crops.
2   Which of the following is single purpose reservoir?
    (A)   Bhakra Nangal reservoir
    (B)   Hirakud reservoir
    (C)   Koyana reservoir
    (D)   Jayakwadi reservoir stage
3   _______________is the instrument prescribed by use at all Government rain gauge station throughout the India
    (A)   Tipping Bucket Rain gauge
    (C)   Float Type Rain gauge
    (D)   Symon’s rain gauge
    (B)   Weighing Bucket Rain gauge
4   The isohyets for annual rainfall over a Cauvery river basin were drawn as given below. The average depth of annual precipitation over the basin is
Isohyets   (cm)868580757065605550
Between Isohyets (A) cm2435.2455.94.54.11.3
    (A)   96.7 cm
    (B)   69.7 cm
    (C)   76.9 cm
    (D)   67.9 cm
5   The rainfall data over a catchment is given below. Area of the Catchment = 80 Sq. Km, Coefficient of Runoff = 0.7, Dependability Percentage = 70%. The yield from the catchment is
Year20102011201220132014201520162017201820192020
Rainfall (mm)13761225120512291285146613141325142312921374
    (A)   84.2 Mm3
    (B)   90.3 Mm3
    (C)   74.2 Mm3
    (D)   64.5 Mm3
6   Maximum flood discharge from a catchment area 1340 Km2 using constant 125 and 10.4 using Inglis formula is
    (A)   5458.099 m3/sec
    (B)   4558.097 m3/sec
    (C)   5548.098 m3/sec
    (D)   8455.097 m3/sec
7   Total volume of water available from a catchment area at the outlet in a one year is called as
    (A)   Rainfall
    (B)   Precipitation
    (C)   Yield
    (D)   Both (a) and (b)
8   For a site of a reservoir, the minimum yield is 200 Mm3; however the maximum yield is 600 Mm3 in a rainfall cycle of 34 years. If the reservoir is planned for the maximum yield, the dependability percentage is
    (A)   100%
    (B)   3%
    (C)   50%
    (D)   75%
9   Maximum discharge of river during flood is called as
    (A)   Yield
    (B)   Maximum Flood Discharge
    (C)   Runoff
    (D)   Inflows
10   Choose correct statement/statements of the following
    (A)   The rain gauge should not be setup in open place
    (B)   The rain gauge should never be situated on the side or top of the hill
    (C)   Possibility of human error is obviated in case of recording rain gauges
    (D)   Attendant is required to record rainfall in case of recording rain gauges.
11   Total depth of water required by a crop during the entire period the crop is in the field is called as
    (A)   Duty (D)
    (B)   Delta (Δ)
    (C)   Time Factor
    (D)   Capacity Factor
12   Relation between Duty (D), Delta (Δ) and Base Period (B) is expressed as
    (A)   Δ = 8.64 B/D m
    (B)   Δ = 864 B/D cm
    (C)   D =8.64 B/Δ ha/cumec
    (D)   All of the above
13   The delta (Δ) for a crop; if the duty (D) for a base period of 110 days is 1400 hectares/cumec is
    (A)   0.68 m
    (C)   0.86 m
    (D)   0.60 m
    (B)   0.58 m
14   A crop requires a total depth of 92 cm of water for a base period of 120 days. The duty of water is
    (A)   1127.00 hectares/cumec
    (B)   1150.40 hectares/cumec
    (C)   1100.50 hectares/cumec
    (D)   1200.00 hectares/cumec
15   The left branch canal carrying a discharge of 20 cumecs has culturable commanded area of 20000 hectares. The intensity of Rabi crop is 80% and the base period is 120 days. The right branch canal carrying discharge of 8 cumecs has culturable command area 12000 hectares. Intensity of irrigation of Rabi crops is 50% and the base period 120 days. The duty of water in left canal is__________
    (A)   200 hectares/cumec
    (B)   750 hectares/cumec
    (C)   800 hectares/cumec
    (D)   300 hectares/cumec
16   The left branch canal carrying a discharge of 20 cumecs has culturable commanded area of 20000 hectares. The intensity of Rabi crop is 80% and the base period is 120 days. The right branch canal carrying discharge of 8 cumecs has culturable command area 12000 hectares. Intensity of irrigation of Rabi crops is 50% and the base period 120 days. Which is system is most efficient
    (A)   Right Canal System
    (B)   Left Canal System
    (C)   Both Right Canal System and Left Canal System
    (D)   None of the Canal System is efficient
17   In case of assessment of irrigation water, the water meters are required for the assessment of irrigation water for
    (A)   Crop rate basis assessment
    (B)   Assessment on seasonal basis
    (C)   Permanent assessment
    (D)   Volumetric assessment
18   At the time of the floods in the reservoir, the water level in the reservoir is allowed to rise upto
    (A)   FRL (Full Reservoir Level)
    (B)   MWL (Maximum Water Level)
    (C)   TDL (Top Dam Level)
    (D)   DSL (Dead Storage Level)
19   The rate of silting in the reservoir is expressed as
    (A)   km2/m2/Year
    (B)   m2/km2/Year
    (C)   m3/km2/Year
    (D)   m3/km/Year
20   In case of the investigations for reservoir planning, the area-elevation and storage-elevation curves fall under
    (A)   Geological Investigations
    (B)   Engineering Survey
    (C)   Hydrological Investigations
    (D)   Zones of the reservoir
21   Identify incorrect statement from the following
    (A)   The reservoir basin should have narrow opening in the valley so that the length of the dam is more
    (B)   The reservoir site should be such that it excludes water from those tributaries carrying silt
    (C)   Site should be such that percolation below dam should be minimum
    (D)   Cost of real estate for the reservoir must be as less as possible
22   Choose incorrect statement from the following
    (A)   Earthen dams are not suitable for heavy rainfall
    (B)   Earthen dams are non-rigid dams
    (C)   Section of earthen dam is Trapezoidal
    (D)   Earthen dams are fairly water-tight
23   Earthen dams are most suitable where
    (A)   Valley is wide
    (C)   Valley is narrow
    (D)   Valley is moderate with vertical sides
    (B)   None of the above
24   Main function of the spillway is to
    (A)   Discharge flood water
    (B)   Supply water for irrigation
    (C)   Supply water for power generation
    (D)   None of the above
25   A gallery in concrete dam runs
    (A)   Parallel to the length of the dam
    (B)   Perpendicular to the length of the dam
    (C)   Both (A) and (B)
    (D)   None of the above
26   The height of horizontal joints in gravity dams usually limited to about
    (A)   0.5 m
    (B)   3 m
    (C)   2.5 m
    (D)   1.5 m
27   Solid gravity dam may fail because of
    (A)   Sliding
    (B)   Overturning
    (C)   Tension and crushing
    (D)   All of the above
28   Identify the incorrect statement from the following Forms
    (A)   Shape of the elementary profile is right angle triangle
    (B)   Free board is not provided in case of theoretical profile
    (C)   For the road construction, top width is not provided in practical profile
    (D)   Practical profile is not right angle triangle

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