Heat and Mass Transfer Thermal diffusivity is a All of these Physical property of a substance Dimensionless parameter Function of temperature All of these Physical property of a substance Dimensionless parameter Function of temperature 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 Flow of hot and cold fluids alternately over a surface Direct mixing of hot and cold fluids Generation of heat again and again A complete separation between hot and cold fluids Flow of hot and cold fluids alternately over a surface Direct mixing of hot and cold fluids Generation of heat again and again ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The use of heat exchangers is made in Radiators in automobile All of these Condensers and boilers in steam plants Condensers and evaporators in refrigeration and air conditioning units Radiators in automobile All of these Condensers and boilers in steam plants Condensers and evaporators in refrigeration and air conditioning units 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, The better insulation must be put inside One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put outside One could place either insulation on either side The better insulation must be put inside One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put outside One could place either insulation on either side ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be One Four Three Two One Four Three Two ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A perfect black body is one which Is black in colour Reflects all heat Absorbs heat radiations of all wave lengths falling on it Transmits all heat radiations Is black in colour Reflects all heat Absorbs heat radiations of all wave lengths falling on it Transmits all heat radiations ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS