For a rectangular sharp-crested weir, the discharge varies approximately with the upstream head over the crest raised to the power:
Correct answer: C. Three-halves
- A. One-half
- B. One
- C. Three-halves
- D. Two
Explanation
The standard weir relationship for a rectangular sharp-crested weir has discharge proportional to H^(3/2), apart from the coefficient and crest width. The one-half power is associated with some orifice velocity expressions, not this weir law.
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Hydraulics studies fluid properties, pressure, buoyancy, continuity, Bernoulli's equation, momentum, pipe flow, open-channel flow and hydraulic machines. Water resources extends these principles to pumps, turbines, reservoirs, irrigation, floods and hydrology, while distinguishing laminar from turbulent flow and uniform from gradually varied channel flow.
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