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Irrigation Engineering

Irrigation Engineering
The water utilizable by plants is available in soils mainly in the form of

gravity water
capillary water
hydroscopic water
chemical water

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Irrigation Engineering
F.S.L. of a canal at its head with respect to parent channel is kept

At the same level
None of these
15 cm lower
15 cm higher

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Irrigation Engineering
If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be

1/(1-0.9°10)
1 – (0.9)°l0
1/(1+ 0.9010)
1 + (0.9)010

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Irrigation Engineering
An outlet is said to be proportional if its flexibility, is

One
Less than one
More than one
Zero

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Irrigation Engineering
Seepage through foundation in an earthen dam is controlled by providing

horizontal blanket
impervious cut off
rock toe
chimney drain

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Irrigation Engineering
If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be

60 minutes
30 minutes
15 minutes
20 minutes

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