Heat Transfer If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will Increase by 216 Decrease by 22 Remain unchanged Increase by 1.8 times Increase by 216 Decrease by 22 Remain unchanged Increase by 1.8 times ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 10 minutes 20 minutes 5 minutes 40 minutes 10 minutes 20 minutes 5 minutes 40 minutes 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 square root of four times twice none of the listed here square root of four times twice none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Presence of a non-condensing gas in a condensing vapour is desirable to increase the film co-efficient decreases thermal resistance increases the rate of condensation None of the listed here is desirable to increase the film co-efficient decreases thermal resistance increases the rate of condensation None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a Factor of safety None of these Non-dimensional factor Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Factor of safety None of these Non-dimensional factor Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivity of a conducting solid material depends upon its both temperature & porosity porosity None of the listed here temperature both temperature & porosity porosity None of the listed here temperature ANSWER DOWNLOAD EXAMIANS APP
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