In a barrage, the crest level is kept
A. Low with large gates
B. High with large gates
C. High with no gates
D. Low with no gates
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Bligh's theory of seepage assumes
A. Equal weightage to the horizontal and vertical creep
B. More weightage to horizontal creep than vertical creep
C. Less weightage to horizontal creep than vertical creep
D. Loss of head follows the sine curve
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If B and d are the bed width and depth of a channel in meters, the combined losses due to evaporation and seepage in cumecs per kilometer length of the channel, is
A. 50 1 × ( B + d ) 3 2
B. 100 1 × ( B + d ) 3 2
C. 150 1 × ( B + d ) 3 2
D. 200 1 × ( B + d ) 3 2
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As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
A. lower level
B. higher level
C. same level
D. any of the above depending on the design
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The runoff increases with
A. increase in intensity of rain
B. increase in infiltration capacity
C. increase in permeability of soil
D. all of the above
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A runoff river plant is
A. a low head scheme
B. a medium head scheme
C. a high head scheme
D. none of the above
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The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as
A. water conveyance efficiency
B. water application efficiency
C. water use efficiency
D. none of the above
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Infiltration is the
A. movement of water through the soil
B. absorption of water by soil surface
C. both (A) and (B)
D. none of the above
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Which of the following is a flexible outlet ?
A. submerged pipe outlet
B. Kennedy’s gauge outlet
C. Gibb’s outlet
D. none of the above
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Vertical drop fall is satisfactory for a height upto
A. 0.5 m
B. 1.5 m
C. 3.5 m
D. 5.0 m
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Tortuosity of a meandering river is always
A. equal to 1
B. less than 1
C. greater than 1
D. less than or equal to 1
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The discharge passing over an ogee spillway is given by (where, L is effective length of spillway crest and H is the total head over the spillway crest including velocity head.)
A. CL H 2 3
B. CH L 2 3
C. CL H 2 5
D. CL H 2 1
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The measure to remove water logging of land, is
A. To reduce percolation from canals and water courses
B. To increase outflow from the ground water reservoir
C. Both (A) and (B)
D. Neither (A) nor (B)
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A hydraulic structure is designed to withstand
A. Seepage forces
B. Hydraulic jump
C. Hydraulic pressure
D. All the above
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Attracting groynes are built
A. Perpendicular to the bank
B. Inclined down stream
C. Inclined up stream
D. None of these
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A unit hydro graph has one unit of
A. rainfall duration
B. rainfall excess
C. time base of direct runoff
D. discharge
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The top of the capillary zone
A. Lies below the water table at every point
B. Lies above the water table at every point
C. Coincides the water table at every point
D. None of these
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For a standing crop, the consumptive use of water is equal to the depth of water
A. Transpired by the crop
B. Evaporated by the crop
C. Transpired and evaporated by the crop
D. Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil
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For a proportional outlet, the flexibility is
A. zero
B. between zero and 1
C. 1
D. greater than 1
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As per Lacey’s theory, the silt factor is
A. directly proportional to average par¬ticle size
B. inversely proportional to average par¬ticle size
C. directly proportional to square root of average particle size
D. not related to average particle size
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