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Irrigation Engineering

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

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

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Irrigation Engineering
A river bend characterized by silting

scouring on concave side
scouring on concave side and silting on convex side
scouring on convex side and on concave side
silting on convex side

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Irrigation Engineering
The Lacey's regime velocity is proportional to

R3/4 S1/3
Q3/4 S1/3
R2/3 S1/2
R1/2 S3/4

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Irrigation Engineering
Hydrodynamic pressure due to earthquake acts at a height of

4H/3π above the base
3H/4π below the water surface
3H/4π above the base
4H/3π below the water surface, where H is the depth of water

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Irrigation Engineering
Trap efficiency of a reservoir is a function of

capacity/outflow ratio
None of these
capacity/inflow ratio
outflow/inflow ratio

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Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

t = (h + 1)/(G + t)
t = (h - 1)/(G + t)
t = (h + 1)/G
t = (h - 1)/(G - t)

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