Civil Engineering :: Irrigation
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For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is
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Pick up the correct statement from the following
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Groynes are generally built
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The top of the capillary zone
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Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
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Pick up the correct statement from the following
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For the design of major hydraulic structures on the canals, the method generally preferred to, is based on
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For designing the venturi head,
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The sinuosity of a meander is the ratio of
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The top soil of a water logged field becomes more alkaline and infertile if its pH value is
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A.
Approach of the water line in a flumed channel section should not be steeper than 22 \( \frac { 1 } { 2 }^0\) |
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B.
Departure of the water line from a flumed channel section should not be steeper than 30° |
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C.
Approach of the water line should not be steeper than 30° and departure line not steeper than 22\( \frac { 1 } { 2 }^0\) in a flumed channel section |
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D.
Approach and departure of the water line in a flumed channel section, should not be steeper than 22 \( \frac { 1 } { 2 }^0\) |
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A.
In a level crossing, a crest with its top at the canal F.S.L. is provided across the drainage at its up-stream junction with canal |
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B.
In a level crossing a regulator is provided across the drainage at its down-stream |
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C.
in a level crossing, a cross regulator is provided on the canal below the crossing |
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D.
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A.
width of the throat should not be less than one-third of the bed width of main canal |
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B.
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C.
minimum throat width should not be less than 60 cm |
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D.
length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal |
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E.
all the above |