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Irrigation Engineering

Irrigation Engineering
A hydraulic structure is designed to withstand

Hydraulic pressure
Seepage forces
All of these
Hydraulic jump

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Irrigation Engineering
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation

t = (h - 1)/(G + t)
t = (h - 1)/(G - t)
t = (h + 1)/G
t = (h + 1)/(G + t)

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Irrigation Engineering
The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to

Load factor
Plant factor
Utilization factor
Both load and plant factor

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Irrigation Engineering
Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as

medium sodium water
low sodium water
very high sodium water
high sodium water

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Irrigation Engineering
A straight glacis type fall with a baffle platform and a baffle wall is called

Vertical drop-fall
Montague type fall
Inglis fall
Glacis fall

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Irrigation Engineering
For cereal crops the most commonly adopted method of irrigation, is

Free flowing method
Check method
Furrow method
Sprinkling method

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