1963. For a flood control reservoir, the effective storage is equal to_______________?

A. useful storage – valley storage
B. useful storage + surcharge storage
C. useful storage + surcharge storage + valley storage
D. useful storage + surcharge storage -valley storage
✅ The correct answer is option D.

1966. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?

A. 0 and wH212
B. wH2/2and wH2/3
C. wH and 0
D. OandwII
✅ The correct answer is option D.