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Irrigation Engineering

Irrigation Engineering
The depth of rice root zone, is

60 cm
50 cm
90 cm
80 cm

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Irrigation Engineering
A unit hydro graph has one unit of

time base of direct runoff
rainfall duration
rainfall excess
discharge

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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

2.0 D
1.2 D
1.5 D
2.5 D

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Irrigation Engineering
If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that

reservoir was not full at the beginning
both (A) and (B)
demand cannot be met by inflow
None of these

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Irrigation Engineering
The ratio of the head recovered to the head put in, is known as

Flexibility
Sensitivity
Modular limit
Efficiency

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Irrigation Engineering
The downstream expansion head of a guide bank is extended to subtend an angle at the centre, equal to

45°
90°
30°
60°

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