In the electrical network analysis method the total radiation which leaves a surface per unit time per unit area is termed as

Related MCQs

• According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to
• The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit
• The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
• Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called
• The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emissivities εx & εy is given by
• The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by
• The total solar radiation incident on a body is 1000 kcal/min. The body reflects 400 kcal/min. If the transmissivity of the surface will be
• The statement that the emissivity and absorptivity of a surface is surrounded by its own temperature are the same for both monochromatic and total radiation, is known as
• For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area
• Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the