Which of the following is used for very accurate measurement of flow of gas at low velocity ?
Correct answer: D. Hot wire anemometer
- A. Pitot tube
- B. Rotameter
- C. Segmental orificemeter
- D. Hot wire anemometer
Explanation
A hot-wire anemometer measures gas velocity from the cooling effect of the flow on a heated wire and is especially sensitive at low velocities. Pitot tubes and flow meters are less suitable for very low gas speeds.
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