Irrigation Engineering
Presence of tail water in a gravity dam
i) increases the principal stress
ii) decreases the principal stress
iii) increases the shear stress
iv) decreases the shear stress
The correct answer is

(i)and(iv)
(ii) and (iv)
(ii) and (iii)
(i) and (iii)

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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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