According to the Darcy Weisbach equation, pipe friction head loss is proportional to which quantity?
Correct answer: B. (L/D)(V²/2g)
- A. (D/L)(V²/2g)
- B. (L/D)(V²/2g)
- C. (L/D)(2g/V²)
- D. (D/L)(2g/V²)
Explanation
The Darcy Weisbach relation is h_f = f(L/D)(V²/2g), where f is the friction factor. Thus, loss increases with pipe length and velocity, and generally decreases as diameter increases.
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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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