Heat and Mass Transfer The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as Forced convection Conduction Free convection Radiation Forced convection Conduction Free convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The unit of overall coefficient of heat transfer is kcal/m² hr °C kcal/m hr °C kcal/m² kcal/hr °C kcal/m² hr °C kcal/m hr °C kcal/m² kcal/hr °C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The heat transfer by conduction through a thick sphere is given by Q = 4πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 2πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 6πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 8πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 4πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 2πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 6πkr1 r2 (T1 - T2)/ (r2 - r1) Q = 8πkr1 r2 (T1 - T2)/ (r2 - r1) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thermal diffusivities for solids are generally More than those for liquids and gases More or less same as for liquids and gases Less than those for gases Less than those for liquids More than those for liquids and gases More or less same as for liquids and gases Less than those for gases Less than those for liquids 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 One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside The better insulation must be put outside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside The better insulation must be put outside ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In regenerator type heat exchanger, heat transfer takes place by A complete separation between hot and cold fluids Generation of heat again and again Direct mixing of hot and cold fluids Flow of hot and cold fluids alternately over a surface A complete separation between hot and cold fluids Generation of heat again and again Direct mixing of hot and cold fluids Flow of hot and cold fluids alternately over a surface ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS