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Irrigation Engineering

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

chemical water
capillary water
gravity water
hydroscopic water

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Irrigation Engineering
Seepage through embankments in an earthen dam is controlled by

drainage filters
relief wells
drain trenches
provision of downstream berms

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Irrigation Engineering
Irrigation canals are generally aligned along

Contour line
Valley line
Straight line
Ridge line

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Irrigation Engineering
The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by

(0.99)10
l-(0.9)100
(0.9)00
1 – (0.99)10

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Irrigation Engineering
A river training work is generally required when the river is

Meandering
All of these
Degrading
Aggrading

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Irrigation Engineering
The uplift pressure on a dam can be controlled by i) constructing cutoff under upstream face ii) constructing drainage channels bet-ween the dam and its foundation iii) by pressure grouting in foundation The corret answer is

both (i) and (ii)
(i), (ii) and (iii)
only (i)
both (i) and (iii)

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