- A. surface tension
- B. viscosity
- C. friction
- D. cohesion
Hydraulics and Fluid Mechanics
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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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For laminar flow in circular pipes, the Darcy’s friction factor f is equal to
- A. 16/Re
- B. 32/ Re
- C. 64/ Re
- D. none of the above where Re is Reynolds number
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Piezometer is used to measure
- A. pressure in pipe, channels etc
- B. atmospheric pressure
- C. very low pressures
- D. difference of pressure between two points
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Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be
- A. 1000 kg
- B. 4000 kg
- C. 2000 kg
- D. 8000 kg
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The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as
- A. one dimensional flow
- B. uniform f^w
- C. steady flow
- D. turbulent flow
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The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
- A. center of gravity
- B. center of buoyancy
- C. center of pressure
- D. metacentre
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Working principle of dead weight pressure gauge tester is based on
- A. Pascal’s law
- B. Dalton’s law of partial pressure
- C. Newton’s law of viscosity
- D. Avogadro’s hypothesis
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If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is
- A. 0.25
- B. 0.50
- C. 1.0
- D. none of the above
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Cavitation is caused by
- A. high velocity
- B. high pressure
- C. weak material
- D. low pressure
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Property of a fluid by which its own molecules are attracted is called
- A. adhesion
- B. cohesion
- C. viscosity
- D. compressibility