Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is _____________ mm?
Correct answer: B. > 12.5
- A. 4
- B. > 12.5
- C. < 10
Explanation
Capillary rise or depression becomes negligible when the manometer tube is sufficiently large, conventionally above about 12.5 mm in diameter. Small-bore tubes require a capillary correction.
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