Rajasthan Technical Education Second Year Paper 2016 Transport Phenomena

Rajasthan Technical Education Second Year Paper 2016 Transport Phenomena

The rate of diffusion of a constituent A in a mixture is proportional to its concentration gradient. This is
(a) Fick’s Law
(b) Fourier’s Law
(c) Newton’s Law
(d) None of these

For Newtonian fluid the shear stress in a fluid is proportional to the velocity gradient. This is
(a) Fick’s Law
(b) Fourier’s Law
(c) Newton’s Law
(d) None of these

The temperature gradient is in the
(a) Opposite direction of heat flow
(b) Same direction of heat flow
(c) Both (a) & (b) both
(d) None of these

Unit of thermal conductivity is
(a) m/WK
(b) Wm/K
(c) W/mK
(d) None of these

The effects of bulk flow can be neglected at
(a) high concentrations
(b) low concentrations
(c) average concentrations
(d) None of these

Diffusivities of vapours are most conveniently determined by the method developed by
(a) Newton
(b) Fourier
(c) Winkelmann
(d) All of these

According to Maxell’s law of diffusion partial pressure gradient
(a) Proportional to the relative velocity of the molecules in the direction of diffusion
(b) Proportional to the product of the molar concentrations of the components
(c) Both (a) & (b)
(d) None of these

Sum of mass fractions of components in a mixute is
(a) 100
(b) 1
(c) Both (a) & (b)
(d) None of these

For conduction through a thick walled tube
(a) The area for heat flow is proportional to the radius
(b) The temperature gradient is inversely proportional to this radius
(c) Both (a) & (b)
(d) None of these

For forced convection outside a single tube
(a) rate of heat flow is maximum at front
(b) rate of heat flow is maximum at back
(c) rate of heat flow is only 40% of maximum at sides
(d) all of these

For streamline flow forced convection inside tube Nusselt number is
(a) 2.1
(b) 4.1
(c) 2.0
(d) 0.0

Dilatant is
(a) Shear thickening fluid
(b) Shear thinning fluid
(c) Both (a) & (b)
(d) None of these

Shear thinning fludis are
(a) Dilatant
(b) Pseudoplastic
(c) Bingham plastic
(d) Newtonian

For stream line flow in a pipe the mean velocity is
(a) 0.5 times the maximum velocity
(b) 0.25 times the maximum velocity
(c) 0.75 time the maximum velocity
(d) None of these

In mass transfer through stationary gas, the non-diffusing component will undergo
(a) no net movement with respect to interface
(b) some net movement with respect to interface
(c) Both (a) & (b)
(d) None of these