Heat Transfer A diathermaneous substance __________ the thermal radiation completely. Absorbs Reflects None of these Transmits Absorbs Reflects None of these Transmits 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 h0/2K 2K/h0 h0/K K/h0 h0/2K 2K/h0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Unsteady state heat conduction occurs, when Temperature distribution is independent of time Temperature distribution is dependent on time Three dimensional heat flow is concerned Heat flows in one direction only Temperature distribution is independent of time Temperature distribution is dependent on time Three dimensional heat flow is concerned Heat flows in one direction only ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A perfect black body is a perfect __________ of radiation absorber none of the listed here Both emitter & absorber emitter absorber none of the listed here Both emitter & absorber emitter ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling of milk in an open vessel is an example of __________ boiling. Film None of these Sub-cooled Saturated nucleate Film None of these Sub-cooled Saturated nucleate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure. Remain unchanged May increase or decrease; depends on the pressure Decrease Increase Remain unchanged May increase or decrease; depends on the pressure Decrease Increase ANSWER DOWNLOAD EXAMIANS APP
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