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) h0/2K 2K/h0 h0/K K/h0 h0/2K 2K/h0 h0/K K/h0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Correction is applied to LMTD for __________ flow. Parallel Counter None of these Cross Parallel Counter None of these Cross ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat waves Can not pass through vacuum Both B and C Travel in straight line Can be reflected by a mirror Can not pass through vacuum Both B and C Travel in straight line Can be reflected by a mirror ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Grashoff number is defined as the ratio of the buoyancy to viscous forces buoyancy to inertial forces inertial to viscous forces. buoyancy to surface tension forces buoyancy to viscous forces buoyancy to inertial forces inertial to viscous forces. buoyancy to surface tension forces ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is None of these Infinity Same as average heat transfer co-efficient for tube side Zero None of these Infinity Same as average heat transfer co-efficient for tube side Zero 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 Surrounding temperature Average temperature of the fin Constant temperature equal to that of the base Temperature of the fin end Surrounding temperature Average temperature of the fin Constant temperature equal to that of the base Temperature of the fin end ANSWER DOWNLOAD EXAMIANS APP
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