Heat Transfer Value of Nusselt number [Nu = (hD/k)] for the heat transfer by conduction from a droplet or a spherical particle to a surrounding stagnant film is 100 0.5 10 2 100 0.5 10 2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C. 1.49 1 4.88 None of these 1.49 1 4.88 None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature Temperature of the fin end Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature Temperature of the fin end ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the thermal conductivity of non-metallic amorphous solids decreases remains same increases None of the listed here decreases remains same increases None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Viscosity of gases __________ with increase in temperature. Remain unaffected Increase very rapidly Increase slowly Decrease slowly Remain unaffected Increase very rapidly Increase slowly Decrease slowly ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Finned tube heat exchangers are used for smaller heat load use metal fins of low thermal conductivity give larger area per tube facilitate very large temperature drop through tube wall are used for smaller heat load use metal fins of low thermal conductivity give larger area per tube facilitate very large temperature drop through tube wall ANSWER DOWNLOAD EXAMIANS APP
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