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Irrigation Engineering

Irrigation Engineering
The relation between probability (P) and recurrence interval (T) is given by

PT = 1
P/T2 = 1
PT2 = 1
P/T = 1

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

rigid module
non-modular outlet
flexible outlet
None of these

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Irrigation Engineering
In case of a trapezoidal notch fall

Splay downstream from the notch section is 22½°
All listed here
Splay upstream from the notch section is 45°
Top length of the piers should not be less than their thickness

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Irrigation Engineering
According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is

infinity
very large
unity

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Irrigation Engineering
If average particle size of the silt in millimeters is m, the Lacey's silt factor f is proportional to

m3
m1/3
m2/3
m1/2

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Irrigation Engineering
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

All listed here
Of height ⅓rd to ¼th the depth of water in the main canal
Spaced at interval of 1½ times their heights
Of R.C.C. or steel plate 8 cm thick

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