Irrigation Engineering
Pick up the correct statement from the following answer

If the flexibility is zero, it is a rigid module
If the flexibility is more than one, the outlet is hyper-proportional
If the setting of an outlet is higher than that required for proportionality, the outlet is hyperproportional
All of these

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Irrigation Engineering
As per Lacey’s theory, the silt factor is

inversely proportional to average par¬ticle size
directly proportional to average par¬ticle size
not related to average particle size
directly proportional to square root of average particle size

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