What is the correct answer?


The concept of overall coefficient of heat transfer is used in heat transfer problems of

A. Conduction

B. Convection

C. Radiation

D. Conduction and convection

Correct Answer :

D. Conduction and convection

Related Questions

Heat flows from one body to other when they have A grey body is one whose absorptivity When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity… Upto the critical radius of insulation, According to Newton's law of cooling, the heat transfer from a hot body… Heat is transferred by all three modes of transfer, viz. conduction, convection… Depending on the radiating properties, body will be transparent when The heat is transferred by conduction, convection and radiation in The automobile radiator is a heat exchanger of Thermal diffusivity is According to Dalton's law of partial pressures, (where pb = Barometric… In free convection heat transfer, Nusselt number is function of Which of the following property of air does not increase with rise in… The total radiation from a black body per second per unit area is ________… Unit of thermal conductivity in S.I. units is The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x.… Temperature of steam at around 540°C can be measured by According of Kirchhoff's law A designer chooses the values of fluid flow rates and specific heats in… In case of liquids and gases, the heat transfer takes place according… According to Kirchoff's law, the ratio of emissive power to absorptivity… Which of the following has maximum value of thermal conductivity? The unit of overall coefficient of heat transfer is Radiation is the process of heat transfer in which heat flows from a ________,… Film coefficient is defined as the ratio of Fourier's law of heat conduction is valid for Heat conducted through per unit area and unit thick face per unit time… The process of heat transfer from one particle of the body to another… Absorptivity of a body will be equal to its emissivity Depending on the radiating properties, a body will be opaque when