The specific energy of an open channel section is measured relative to the:
Correct answer: B. Channel bed
- A. Water surface
- B. Channel bed
- C. Top of the bank
- D. Hydraulic grade line
Explanation
Specific energy is the energy per unit weight measured with the channel bed as the datum, expressed as E = y + V²/(2g). The water surface is not the reference level for this definition.
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About Hydraulics and Water Resources
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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Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
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