Heat and Mass Transfer Moisture would find its way into insulation by vapour pressure unless it is prevented by High thickness of insulation High vapour pressure Less thermal conductivity insulator A vapour seal High thickness of insulation High vapour pressure Less thermal conductivity insulator A vapour seal ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water _________ with rise in temperature. Remain same Increases May increase or decrease depending upon temperature Decreases Remain same Increases May increase or decrease depending upon temperature Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According of Kirchhoff's law Emissive power depends on temperature Emissive power and absorptivity are constant for all bodies Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body Radiant heat is proportional to fourth power of absolute temperature Emissive power depends on temperature Emissive power and absorptivity are constant for all bodies Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body Radiant heat is proportional to fourth power of absolute temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The transfer of heat by molecular collision is smallest in None of these Liquids Gases Solids None of these Liquids Gases Solids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The use of heat exchangers is made in Condensers and evaporators in refrigeration and air conditioning units Condensers and boilers in steam plants All of these Radiators in automobile Condensers and evaporators in refrigeration and air conditioning units Condensers and boilers in steam plants All of these Radiators in automobile 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 One could place either insulation on either side The better insulation must be put outside The better insulation must be put inside 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 outside ANSWER DOWNLOAD EXAMIANS APP
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