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Irrigation Engineering

Irrigation Engineering
Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be

38m
19m
91m
15m

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Irrigation Engineering
The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

250 years
50 years
200 years
150 years

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Irrigation Engineering
Variability of rainfall is
i) largest in regions of high rainfall
ii) largest in coastal areas
iii) largest in regions of scanty rainfall
The correct answer is

(ii) and (iii)
only (i)
only (iii)
(i) and (ii)

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Irrigation Engineering
An aggrading river is a

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

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Irrigation Engineering
Coefficient of discharge of an ogee spillway

depends on downstream apron interference and downstream submergence
remains constant
depends on depth of approach and upstream slope
both (A) and (B)

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Irrigation Engineering
Vertical drop fall is satisfactory for a height upto

0.5 m
5.0 m
3.5 m
1.5 m

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