- A. Steady uniform
- B. Non-steady uniform
- C. Steady non-uniform
- D. Non-steady non-uniform
Fluid Mechanics
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Fluid flow at increasing rate through a diverging pipe is an example of _____ flow.
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f = 16/NRe, is valid for_____.
- A. Turbulent flow
- B. Laminar flow through an open channel
- C. Steady flow
- D. None of these
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Non-colloidal solution is an example of the _____ fluid.
- A. Non-Newtonion
- B. Newtonion
- C. Dilatent
- D. Pseudoplastic
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For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to_____.
- A. R
- B. R2
- C. R4
- D. R0.5
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Which of the following equations is valid for laminar flow of a fluid through packed bed?
- A. Fanning equation
- B. Kozney – Karman equation
- C. Hagen – Poiseuille equation
- D. Blake – Plummer equation
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The pressure and power requirement of a gas fan at constant speed & capacity varies _____ the gas density.
- A. Directly as
- B. Inversely as square root of
- C. Inversely as
- D. As square of
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In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is_____.
- A. d
- B. d2
- C. d2.5
- D. d4
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Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation ? 1. Fluid flow is frictionless & irrotational. 2. Fluid flow is steady. 3. Fluid flow is uniform & turbulent. 4. Fluid is compressible. 5. Fluid is incompressible.
- A. 1, 3, 3
- B. 2, 3, 4
- C. 1, 2, 4
- D. 1, 3, 4
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An isentropic process is the one, in which_____.
- A. pv = constant
- B. pvr = constant
- C. pvr = constant, and process is reversible
- D. None of these
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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.
- A. f₁ = f₂
- B. f₁ < f₂
- C. f₁ > f₂
- D. Data not sufficient to relate f₁ & f₂