Exercise: Irrigation

Questions for: Irrigation

If D1 and D2 are depths of water upstream and down stream of a hydraulic jump, the loss of head at the jump, is
A:
B:
C:
D:
Answer: D
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In case of a trapezoidal notch fall
A:
top width of the notch is kept between 3/4 th of full water depth above the sill of the notch
B:
top length of the piers should not be less than their thickness
C:
splay up stream from the notch section is 45°
D:
splay down stream from the notch section is
Answer: E
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A land is said to be water-logged if its soil pores within
A:
a depth of 40 cm are saturated
B:
a depth of 50 cm are saturated
C:
root zone of the crops are saturated
D:
all the above.
Answer: C
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A river is said to be of
A:
aggrading type if it builds up its bed to a certain slope
B:
degrading type if it cuts its bed to a certain slope
C:
meandering type if it flows in sinuous curve
D:
all the above.
Answer: D
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If water table is comparatively high, the irrigation canal becomes useless, due to
A:
large amount of seepage
B:
water logging of the cultivated areas
C:
uncertain water demand
D:
spread of malaria
Answer: E
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