Irrigation Engineering
When surface of transpiration is submerged under water, then potential evapotranspiration is

equal to evapotranspiration
much less than evapotranspiration
much more than evapotranspiration
equal to or less than evapotranspi-ration

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Irrigation Engineering
A water-logged land is found suitable for cultivation due to

Regular supply of water to plants from the water table by capillary action
Absence of aeration of soil from root zone of the plant
None of these
Ease of tillage for preparation of the field for optimum condition of germination

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Irrigation Engineering
A divide wall is provided

At an inclination to the axis of weir
Parallel to the axis of weir and upstream of it
At right angle to the axis of weir
Parallel to the axis of weir and downstream of it

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Irrigation Engineering
For designing the venturi head,

Length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal
Minimum throat width should not be less than 60 cm
All listed here
Width of the throat should not be less than one-third of the bed width of main canal

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