Irrigation Engineering
The most suitable section of a lined canal, is

Triangular section with circular bottom for small canals
Trapezoidal section with rounded corners for large canals
Both (a) and (b)
None of these

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Irrigation Engineering
If A is the area of the surface, x̅ is the depth of its C.G. from the surface of the water and ω is the density of water, then

Total pressure on the surface is equal to ωx̅
All listed here
Depth of the centre of pressure is 2/3H vertically below the surface
Depth of the point at which total pressure acts is equal to its moment of inertia divided by Ax̅

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Irrigation Engineering
A divide wall is provided

At right angle to the axis of weir
At an inclination to the axis of weir
Parallel to the axis of weir and upstream of it
Parallel to the axis of weir and downstream of it

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