Exercise: Irrigation

Questions for: Irrigation

The down stream expansion head of a guide bank is extended to subtend an angle at the centre, equal to
A:
30°
B:
45°
C:
60°
D:
90°
Answer: B
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Canals taken off from ice-fed perennial rivers, are known
A:
permanent canals
B:
ridge canals
C:
perennial canals
D:
inundation canals
Answer: C
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The useful moisture of soil, is equal to its
A:
field capacity
B:
saturation capacity
C:
moisture content at permanent wilting point
D:
difference between filed capacity and permanent wilting point within the root zone of plants.
Answer: D
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If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to
A:
B:
C:
D:
Answer: C
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The scour depth D of a river during flood, may be calculated from the Lacey's equation
A:
B:
C:
D:
Answer: C
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