Discussion
A vane anemometer is used in an audit to measure
Answer: D
Correct answer: air velocity at a grille or duct
A vane anemometer reads the air speed directly from the rotation of its vanes, and multiplying by the free area gives the volume flow - which is what a fan or ventilation audit needs. Static pressure needs a manometer and a pitot tube, humidity a hygrometer, and temperature a thermometer.
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