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Irrigation Engineering

Irrigation Engineering
The most suitable chemical which can be applied to the water surface for reducing evaporation is

Methyl alcohol
Butyl alcohol
Cetyl alcohol
Ethyl alcohol

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Irrigation Engineering
S-hydrograph is used to obtain unit hydrograph of

both (A) and (B)
longer duration from shorter duration
None of these
shorter duration from longer duration

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Irrigation Engineering
The duty is largest

on the field
at the head of water course
same at all places
at the head of a main canal

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

0.5
1
0.25
Zero

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Irrigation Engineering
In India, which of the following is adopted as standard recording rain-gauge?

Symon’s rain-gauge
Natural siphon type
Tipping bucket type
Weighing bucket type

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Irrigation Engineering
When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

Syphon-aqueduct
Syphon
Super passage
Aqueduct

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