Heat and Mass Transfer MCQs

Reynolds number (RN) is given by (where h = Film coefficient, $$l$$ = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, $$\rho $$ = Density of fluid, cp = Specific heat at constant pressure and $$\mu $$ = Coefficient of absolute viscosity)

An ordinary passenger aircraft requires a cooling system of capacity.

A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is

Moisture would find its way into insulation by vapour pressure unless it is prevented by

The ratio of surface convection resistance to the internal conduction resistance is known as

Which of the following is a case of steady state heat transfer?

Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.

Fourier's law of heat conduction gives the heat flow for

In a shell and tube heat exchanger, baffles are provided on the shell side to