Piezometer tube is open to both ends mostly used to measure ____________________?
Correct answer: D. gauge pressure
- A. Atmospheric pressure
- B. absolute pressure
- C. Vacuum pressure
- D. gauge pressure
Explanation
A piezometer measures pressure relative to atmospheric pressure, so its reading represents positive gauge pressure. It cannot normally measure vacuum or negative gauge pressure because the liquid column would not rise in the tube.
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Practise Irrigation and Water Management
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