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Which of the following is suitable for the jet of oil in an unbroken stream?(a) temperature(b) surface tension(c) capillarity(d) vapour pressureI have been asked this question in an interview.This intriguing question originated from Doublet Flow in division Inviscid & Incompressible Flow of Aerodynamics

Answer»

The CORRECT option is (b) surface tension

For EXPLANATION I would say: The surface tension is the property of a fluid which occurs because of the cohesive force between the molecules of the fluid. In a jet of oil, the molecules of oil and the air interact and also the molecules of the oil TRY to ACQUIRE the minimum AREA.



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