Heat Transfer When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling. film none of the listed here transition pool film none of the listed here transition pool 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 Average temperature of the fin Temperature of the fin end Surrounding temperature Constant temperature equal to that of the base Average temperature of the fin Temperature of the fin end Surrounding temperature Constant temperature equal to that of the base ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, square pitch compared to triangular pitch None of these Gives a lower shell side pressure drop Gives a higher shell side pressure drop Can pack more surface area into a shell of given diameter None of these Gives a lower shell side pressure drop Gives a higher shell side pressure drop Can pack more surface area into a shell of given diameter ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For small temperature difference, the heat transfer rate as per Newton's law of cooling is proportional to (where, Δt = excess temperature) Δt Δt³ Δt² √Δt Δt Δt³ Δt² √Δt ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following situations can be approximated to a steady state heat transfer system? A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C 10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C 10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C 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 Remains unaffected Increases Increases exponentially Decreases Remains unaffected Increases Increases exponentially Decreases ANSWER DOWNLOAD EXAMIANS APP
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