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Irrigation Engineering

Irrigation Engineering
A hydroelectric scheme operating under a head of 80 m will be classified as

low head scheme
high head scheme
None of these
medium head scheme

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Irrigation Engineering
If D is the depth of scour below original bed, then the width of launching apron is generally taken as

2.5 D
1.5 D
1.2 D
2.0 D

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Irrigation Engineering
If V₀ is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to

V₀7/2
V₀3/2
V₀5/2
V₀1/2

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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
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
In gravity canals, F.S.L. is

Always below the ground level
Generally 4 to 5 metres above the ground level
Only a few cm above the ground level
Always at the ground level

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