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Irrigation Engineering

Irrigation Engineering
The net speed under which the turbine reaches its peak efficiency is called

gross speed
design speed
rated speed
operating speed

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Irrigation Engineering
Seepage through foundation in an earthen dam is controlled by providing

rock toe
impervious cut off
chimney drain
horizontal blanket

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Irrigation Engineering
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

convex water surface
concave water surface
independent of shape of water surface
flat water surface

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Irrigation Engineering
According to Kennedy, the critical velocity (V₀) in meters in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).

V₀ = 0.55 mD0.54
V₀ = 0.55 mD0.64
V₀ = 0.84 mD0.54
V₀ = 0.84 mD0.64

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Irrigation Engineering
For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

Bligh's theory
Electrical analogy method
The relaxation method
Khosla's method of independent variables

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Irrigation Engineering
The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called

Super passage
Syphon
Syphon aqueduct
Super-aqueduct

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