Heat and Mass Transfer MCQs

The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

The product of Reynolds number and Prandtl number is known as

Upto the critical radius of insulation,

Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow and k = Thermal conductivity of the body)

In counter current flow heat exchanger, the logarithmic temperature difference between the fluids is ________ as compared to parallel flow heat exchanger.

In counter flow heat exchangers

The energy distribution of an ideal reflector at higher temperatures is largely in the range of

When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity (τ) = 0, then the body is said to be a

The unit of Stefan Boltzmann constant is