Which of the following is the basic principle of fluid mechanics?

Mechanical Engineering : Hydraulics and Fluid Mechanics - Quiz(MCQ)

Energy equation

Momentum principle

Continuity equation

All of the above

Correct Answer : Option (D) : All of the above

Explanation : The continuity equation (i.e. mass conservation), the momentum principle (or momentum conservation), and the energy equation are the three basic fluid mechanics principles.

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Free surface of a liquid tends to contract to the smallest possible area due to force of

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Viscosity

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Correct Answer : Surface tension

Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?

Kaplan turbine

Pelton wheel

Francis turbine

None of the above

Correct Answer : Francis turbine

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Specific gravity

Specific weight

Specific density

Correct Answer : Specific gravity

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