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When a capillary tube of uniform-section is lifted from the water surface, water in the tube will be __________

(a) Retained

(b) Not retained

(c) Retained partially

(d) None of the mentioned

I got this question in class test.

This question is from Capillary Water topic in chapter Soil Water Effective and Neutral Stresses of Geotechnical Engineering I

1 Answer

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Best answer
The correct choice is (a) Retained

For explanation: Since the upward force due to surface tension are balanced by downward force at the lower end there will be no water retained in the tube.

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