Heat Transfer The number of kg vaporised per kg of steam fed to the evaporator is defined as Economy Rate of vaporisation Rate of evaporation Capacity Economy Rate of vaporisation Rate of evaporation Capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer Increases Increases exponentially Remains unaffected Decreases Increases Increases exponentially Remains unaffected Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires Less heating surface None of these Lower maintenance cost More space Less heating surface None of these Lower maintenance cost More space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m².s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m²/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is 6000 2000 5000 4000 6000 2000 5000 4000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a vertical tube evaporator, with increase in the liquor level, the __________ is increased. Both A and B Liquor-film co-efficient Neither A and B Velocity of circulation Both A and B Liquor-film co-efficient Neither A and B Velocity of circulation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, Both the spheres will emit equal amount of radiation per unit time in the beginning Both B & C The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant Both will absorb equal amount of radiation from the surrounding in the beginning Both the spheres will emit equal amount of radiation per unit time in the beginning Both B & C The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant Both will absorb equal amount of radiation from the surrounding in the beginning ANSWER DOWNLOAD EXAMIANS APP
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