Earn $100 Online Daily. Work From Home. Click Here

What is the correct answer?


According to Prevost theory of heat exchange

A. It is impossible to transfer heat from low temperature source to t high temperature source

B. Heat transfer by radiation requires no medium

C. All bodies above absolute zero emit radiation

D. Heat transfer in most of the cases takes place by combination of conduction, convection and radiation

Related Questions

The unit of overall coefficient of heat transfer is Heat is closely related with Thermal conductivity of non-metallic amorphous solids with decrease in… The time constant of a thermocouple is A cube at high temperature is immersed in a constant temperature bath.… Which of the following is expected to have highest thermal conductivity? LMTD in case of counter flow heat exchanger as compared to parallel flow… According to Wien's law, the wavelength corresponding to maximum energy… The thermal diffusivities for solids are generally A steam pipe is to be lined with two layers of insulating materials of… The heat transfer by conduction through a thick sphere is given by Radiation is the process of heat transfer in which heat flows from a ________,… Film coefficient is defined as Inside diameter of tube The unit of Stefan-Boltzmann constant is Fourier's law of heat conduction is (where Q = Amount of heat flow through… According to Newton's law of cooling, the heat transfer from a hot body… The transfer of heat by molecular collision is known as The process of heat transfer from one particle of the body to another… The logarithmic mean temperature difference (tm) is given by (where Δt1… Total heat is the heat required to Thermal conductivity of water in general with rise in temperature The ratio of the thickness of thermal boundary layer to the thickness… The use of heat exchangers is made in The ratio of surface convection resistance to the internal conduction… Sensible heat factor is given by (where S.H. = Sensible heat, and L.H.… A steam pipe is to be insulated by two insulating materials put over each… When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity… In counter current flow heat exchanger, the logarithmic temperature difference… The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl… The critical radius is the insulation radius at which the resistance to…