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Irrigation Engineering

Irrigation Engineering
The net speed under which the turbine reaches its peak efficiency is called

design speed
operating speed
gross speed
rated speed

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Irrigation Engineering
The most suitable chemical which can be applied to the water surface for reducing evaporation is

Ethyl alcohol
Methyl alcohol
Cetyl alcohol
Butyl alcohol

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Irrigation Engineering
The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in

super passage and canal syphon
aqueduct and super passage
aqueduct and syphon aqueduct
level crossing

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Irrigation Engineering
If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

Q = 1.71 BD1/2
Q = 1/71 BD2/3
Q = 1.71 BD
Q = 1.71 BD3/2

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Irrigation Engineering
Dimensions of coefficient of transmissibility are

M’LV
M° L2 T1
rvfL’T”1
M°L°T°

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Irrigation Engineering
If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is

R (θ + cos θ)
2R (θ + tan θ)
R (θ + tan θ)
2R (θ + cos θ)

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