Heat Transfer With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer Remains unaffected Increases Increases exponentially Decreases Remains unaffected Increases Increases exponentially Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head four times twice none of the listed here square root of four times twice none of the listed here square root of ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Equal to that of the uninsulated steam pipe Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Equal to that of the uninsulated steam pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent. 26 18 7 1 26 18 7 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Presence of a non-condensing gas in a condensing vapour is desirable to increase the film co-efficient increases the rate of condensation decreases thermal resistance None of the listed here is desirable to increase the film co-efficient increases the rate of condensation decreases thermal resistance None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For an ideal black body Absorptivity = 1 Transmissivity = 1 Reflectivity = 1 Emissivity = 0 Absorptivity = 1 Transmissivity = 1 Reflectivity = 1 Emissivity = 0 ANSWER DOWNLOAD EXAMIANS APP
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