Chemical Engineering :: Fluid Mechanics
- The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which "sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis". The centre of pressure of a rectangular surface (of width 'w') immersed vertically in a static mass of fluid is at a depth of(where, y = depth of the liquid)
- A special type of liquid transporting device is the diffuser pump, in which __________ are minimised.
- A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is
- Weber number is the ratio of inertial force to __________ force.
- One stoke (unit of kinematic viscosity) is equivalent to
- When the water is warm, the height to which it can be lifted by a pump
- For a particle settling in water at its terminal settling velocity, which of the following is true?
- Pick out the correct statement.
- Pick out the wrong statement.
- Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement.
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A.
The form drag is dependent upon the occurrence of a wake |
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B.
The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance |
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C.
An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity |
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D.
Existence of the boundary layer in fluid flow is because of viscosity of the fluid |