Heat Transfer Finned tube heat exchangers use metal fins of low thermal conductivity are used for smaller heat load facilitate very large temperature drop through tube wall give larger area per tube use metal fins of low thermal conductivity are used for smaller heat load facilitate very large temperature drop through tube wall give larger area per tube ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A body is called grey if the monochromatic emissivity of the body is Same for all wavelengths Zero Different for all wavelengths Unity Same for all wavelengths Zero Different for all wavelengths Unity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is Shell and tube heat exchanger with air inside tubes and steam on shell side Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air inside and steam outside Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air inside tubes and steam on shell side Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air inside and steam outside Finned tube heat exchanger with air outside and steam inside ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient May increase or decrease; depends on the feed Is not affected Increases Decreases May increase or decrease; depends on the feed Is not affected Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a forward feed multiple effect evaporator, the pressure is Highest in last effect Same in all effects Dependent on the number of effects Lowest in last effect Highest in last effect Same in all effects Dependent on the number of effects Lowest in last effect ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law. Logarithmic Linear Hyperbolic Parabolic Logarithmic Linear Hyperbolic Parabolic ANSWER DOWNLOAD EXAMIANS APP
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