1. A weir is a structure built across a river or canal to:
(A) None of the above
(B) Store water
(C) Divert water
(D) Control water flow
2. The purpose of a weir is to:
(A) Decrease the velocity of water
(B) Increase the velocity of water
(C) Store water
(D) None of the above
3. The type of flow that occurs over a weir is:
(A) Laminar flow
(B) Steady flow
(C) Transitional flow
(D) Turbulent flow
4. The height of water above the weir crest is known as:
(A) Weir crest
(B) Backwater
(C) Weir height
(D) Freeboard
5. The most common shape of a weir is:
(A) Rectangular
(B) Triangular
(C) Trapezoidal
(D) Circular
6. The discharge over a weir is proportional to:
(A) The width of the weir
(B) The depth of water over the weir
(C) The length of the weir
(D) The height of the weir
7. The critical depth of flow over a weir is the depth at which:
(A) The water begins to spill over the weir
(B) The water reaches its maximum velocity
(C) The water becomes turbulent
(D) The water becomes subcritical
8. A submerged weir is a weir:
(A) Whose crest is always above the water surface
(B) Whose crest is sometimes above and sometimes below the water surface
(C) Whose crest is always below the water surface
(D) None of the above
9. The formula used to calculate the discharge over a rectangular weir is:
(A) Francis formula
(B) Khosla's equation
(C) Chezy's formula
(D) Nappe formula
10. The velocity of water over a weir crest is:
(A) Constant
(B) Increasing
(C) Decreasing
(D) Zero