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Irrigation Engineering

Irrigation Engineering
For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is

0.5
0.25
1
Zero

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Irrigation Engineering
The depth of rice root zone, is

60 cm
50 cm
80 cm
90 cm

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Irrigation Engineering
To determine the discharge at a section in a stream from its rating curve, the required data are
i) slope of water surface at the section
ii) stage at the section
iii) current meter readings at the section
The correct answer is

(ii) and (iii)
only (iii)
only (ii)
(i) and (ii)

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Irrigation Engineering
A 70% index of wetness means

rain deficiency of 30%
None of these
rain excess of 30%
rain deficiency of 70%

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Irrigation Engineering
The Lacey's regime velocity is proportional to

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

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Irrigation Engineering
A hyetograph is a graphical representation of

rainfall depth and time
cumulative rainfall and time
discharge and time
rainfall intensity and time

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