 A. Steady uniform
 B. Nonsteady uniform
 C. Steady nonuniform
 D. Nonsteady nonuniform
Fluid Mechanics

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

f = 16/N_{Re}, is valid for_____.
 A. Turbulent flow
 B. Laminar flow through an open channel
 C. Steady flow
 D. None of these

Noncolloidal solution is an example of the _____ fluid.
 A. NonNewtonion
 B. Newtonion
 C. Dilatent
 D. Pseudoplastic

For the laminar flow of a fluid in a circular pipe of radius R, the HagenPoisseule equation predicts the volumetric flow rate to be proportional to_____.
 A. R
 B. R^{2}
 C. R^{4}
 D. R^{0.5}

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

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

In a fully turbulent flow (Re > 10^{5}) 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. d^{2}
 C. d^{2.5}
 D. d^{4}

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

An isentropic process is the one, in which_____.
 A. pv = constant
 B. pv^{r} = constant
 C. pv^{r} = constant, and process is reversible
 D. None of these

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