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Irrigation Engineering

Irrigation Engineering
If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is

1400
1500
1600
1700

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Irrigation Engineering
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

3V²/4R
2V²/5R
2V²/√3 R
5V²/2R

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Irrigation Engineering
A hyetograph is a graphical representation of

discharge and time
cumulative rainfall and time
rainfall depth and time
rainfall intensity and time

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Irrigation Engineering
Regime conditions in a channel may occur if

All listed here
Discharge is constant
Channel flows uniformly in incoherent alluvium as that transported in suspension
Silt grade and silt charge are constant

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Irrigation Engineering
A land is known as waterlogged

when gravity drainage has ceased
capillary fringe reaches the root zone of plants
when the permanent wilting point is reached
None of these

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Irrigation Engineering
Silt excluders are constructed on the

canal bed upstream of head regulator
canal bed downstream of head regulator
river bed downstream of head regulator
river bed upstream of head regulator

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