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Irrigation Engineering

Irrigation Engineering
Which of the following canal outlets maintains a constant discharge ?

rigid module
flexible outlet
non-modular outlet
None of these

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Irrigation Engineering
According to Khosla, the exits gradient of surface flow

Depends upon the b/d ratio
Is independent of the b/d ratio
Is independent of the depths of d/s cut off walls
None of these

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Irrigation Engineering
Generally the weir is aligned at right angles to the direction of the main river current because

All of these
It is economical
It gives better discharging capacity
It ensures less length of the weir

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Irrigation Engineering
To estimate the magnitude of a flood with a return period of T years, Gumbel’s distribution method requires the following data pertaining to annual flood series
i) mean value
ii) standard deviation
iii) length of record
iv) coefficient of skew
The correct answer is

(i),(ii) and (iii)
(i), (ii), (iii) and (iv)
(i) and (ii)
(i), (ii) and (iv)

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Irrigation Engineering
The top of the capillary zone

Lies below the water table at every point
Lies above the water table at every point
None of these
Coincides the water table at every point

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Irrigation Engineering
The main cause of meandering is

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

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