Which is the most efficient and best for measuring very small flow rate of gases ?
Correct answer: C. Rotameter
- A. Venturimeter
- B. Orificemeter
- C. Rotameter
- D. Flow nozzle
Explanation
A rotameter has a variable-area passage and can measure small gas flow rates with relatively low pressure loss. Venturimeters, orificemeters, and flow nozzles are better suited to larger flows and produce a more significant pressure drop.
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