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IRRIGATION ENGINEERING

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

m1/2
m3
m2/3
m1/3

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Irrigation Engineering
The Lacey's regime velocity is proportional to

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

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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
V₀1/2
V₀5/2

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Irrigation Engineering
The net head under which the turbine reaches its peak efficiency at synchronous speed is called

rated head
design head
gross head
operating head

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Irrigation Engineering
In a concrete canal the approximate permissible velocity of water should not exceed

0.5 m/sec
2 m/sec
1.5 m/sec
1 m/sec

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