Flow measurement in an open channel is done by a/an ________________?
Correct answer: D. Weir
- A. Venturimeter
- B. Orificemeter
- C. Rotameter
- D. Weir
Explanation
A weir measures open-channel flow by relating the upstream liquid head to the discharge over the crest. Venturimeters and orificemeters are normally used in closed conduits, while a rotameter is a variable-area meter.
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