Heat and Mass Transfer If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of 9 81 3 270 9 81 3 270 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Wien's law, the wavelength corresponding to maximum energy is proportion to I² Absolute temperature (T) F T I² Absolute temperature (T) F T ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer 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 None of these (h₁.h₂.h₃)1/3 1/h₁ + 1/h₂ + 1/h₃ h₁ + h₂ + h₃ None of these (h₁.h₂.h₃)1/3 1/h₁ + 1/h₂ + 1/h₃ h₁ + h₂ + h₃ ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, One could place either insulation on either side The better insulation must be put inside The better insulation must be put outside One should take into account the steam temperature before deciding as to which insulation is put where One could place either insulation on either side The better insulation must be put inside The better insulation must be put outside One should take into account the steam temperature before deciding as to which insulation is put where ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by Conduction and convection Convection Conduction Radiation Conduction and convection Convection Conduction Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of radiation mainly depends upon the Nature of the body Type of surface of the body Temperature of the body All of these Nature of the body Type of surface of the body Temperature of the body All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS