Exercise: Irrigation

Questions for: Irrigation

The difference in level between the top of a bank and supply level in a canal, is called
A:
berm
B:
free board
C:
height of bank
D:
none of these.
Answer: B
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If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is
A:
B:
C:
D:
Answer: D
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The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of
A:
reverse curve
B:
next curve of the same order
C:
reverse curve plus the width of the river
D:
none of these.
Answer: B
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Irrigation canals are generally aligned along
A:
ridge line
B:
contour line
C:
valley line
D:
straight line.
Answer: A
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Borrow pits should preferably be located in
A:
field on the left side of the canal
B:
field on the right side of the canal
C:
fields on both sides of the canal
D:
central half width of the section of the canal.
Answer: D
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