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Irrigation Engineering

Irrigation Engineering
The best unit duration of storm for a unit hydrograph is

one-fourth of basin lag
1 hour
one-half of basin lag
equal to basin lag

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Irrigation Engineering
Interception losses are due to
i) evaporation
ii) transpiration
iii) stream flow
The correct answer is

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

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Irrigation Engineering
A unit hydro graph has one unit of

time base of direct runoff
rainfall duration
rainfall excess
discharge

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Irrigation Engineering
Regime conditions in a channel may occur if

Channel flows uniformly in incoherent alluvium as that transported in suspension
Silt grade and silt charge are constant
Discharge is constant
All listed here

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Irrigation Engineering
The main cause of meandering is

degradation
the extra turbulence generated by the excess of river sediment during floods
presence of an excessive bed slope in the river
None of these

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Irrigation Engineering
An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as

Flexible modular outlet
Non-modular outlet
Right modular outlet
Semi-modular outlet

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