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Irrigation Engineering

Irrigation Engineering
Useful soil moisture for plant growth, is

Hygroscopic water
Capillary water
Gravity water
Chemical water

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Irrigation Engineering
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is

3V²/4R
2V²/5R
2V²/√3 R
5V²/2R

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Irrigation Engineering
A deficit of sediments in flowing water may cause a river

Meandering type
Degrading type
Sub-critical type
Aggrading type

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Irrigation Engineering
A hyetograph is a graphical representation of

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

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Irrigation Engineering
For standing crops in undulating sandy fields, the best method of irrigation, is

Free flooding
Furrow method
Sprinkler irrigation
Check method

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Irrigation Engineering
Cross regulators in main canals are provided

To increase water head upstream when a main canal is running with low supplies
To overflow excessive flow water
To regulate water supply in the distributaries
None of these

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