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

A. Protection of banks erosion by the waves B. Control of seepage losses C. Strengthening of banks D. All the above

A. Drains B. Inundation canals C. Valley canals D. Contour canals

A. low head scheme B. medium head scheme C. high head scheme D. none of the above

A. Low sodium water B. Medium sodium water C. High sodium water D. Very high sodium water