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Irrigation Engineering

Irrigation Engineering
River training for depth is achieved by

groynes and bandalling
groynes
both (A) and (B)
construction of dykes or leavees

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Irrigation Engineering
The optimum depth of kor watering for a rice crop, is

23.0 cm
19.0 cm
13.5 cm
17.5 cm

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Irrigation Engineering
An aggrading river is a

scouring river
both silting and scouring river
silting river
neither silting nor scouring river

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Irrigation Engineering
While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2 and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3

A syphon
A syphon aqueduct
A super passage
An aqueduct

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Irrigation Engineering
If B and d are the bed width and depth of a channel in meters, the combined losses due to evaporation and seepage in cumecs per kilometer length of the channel, is

(1/50) × (B + d)2/3
(1/200) × (B + d)2/3
(1/150) × (B + d)2/3
(1/100) × (B + d)2/3

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Irrigation Engineering
The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called

equivalent moisture
hygroscopic water
soil moisture deficiency
pellicular water

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