# Fluid Mechanics

• ## Fluid flow at increasing rate through a diverging pipe is an example of _____ flow.

Explanation:

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• ## f = 16/NRe, is valid for_____.

• A. Turbulent flow
• B. Laminar flow through an open channel
• D. None of these
Explanation:

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• ## Non-colloidal solution is an example of the _____ fluid.

• A. Non-Newtonion
• B. Newtonion
• C. Dilatent
• D. Pseudoplastic
Explanation:

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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
Explanation:

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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
Explanation:

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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
Explanation:

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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
Explanation:

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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
Explanation:

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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
Explanation:

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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