Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is >1 between 0 and 1 1 0 >1 between 0 and 1 1 0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature. May increase or decrease; depends on the gas Decreases Remains unchanged Increases May increase or decrease; depends on the gas Decreases Remains unchanged Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) h0/K K/h0 2K/h0 h0/2K h0/K K/h0 2K/h0 h0/2K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are preferably useful, when Overall heat transfer co-efficient is very high A corrosive liquid is to be heated High viscosity liquid is to be cooled Requirement of heat transfer area is low Overall heat transfer co-efficient is very high A corrosive liquid is to be heated High viscosity liquid is to be cooled Requirement of heat transfer area is low ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vent pipes are provided in a condenser to None of these Remove non-condensable gases Purge the condenser Facilitate easy cleaning of tubes None of these Remove non-condensable gases Purge the condenser Facilitate easy cleaning of tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For an ideal black body Absorptivity = 1 Transmissivity = 1 Emissivity = 0 Reflectivity = 1 Absorptivity = 1 Transmissivity = 1 Emissivity = 0 Reflectivity = 1 ANSWER DOWNLOAD EXAMIANS APP
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