Heat Transfer Double pipe heat exchangers are preferably useful, when Requirement of heat transfer area is low A corrosive liquid is to be heated High viscosity liquid is to be cooled Overall heat transfer co-efficient is very high Requirement of heat transfer area is low A corrosive liquid is to be heated High viscosity liquid is to be cooled Overall heat transfer co-efficient is very high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T³ None of these Q ∝ T⁴ Q ∝ T² Q ∝ T³ None of these Q ∝ T⁴ Q ∝ T² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a forward feed multiple effect evaporator, the pressure is Same in all effects Highest in last effect Lowest in last effect Dependent on the number of effects Same in all effects Highest in last effect Lowest in last effect Dependent on the number of effects ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In counter flow compared to parallel flow, More surface area is required for a given heat transfer rate Both A and B LMTD is greater Less surface area is required for a given heat transfer rate More surface area is required for a given heat transfer rate Both A and B LMTD is greater Less surface area is required for a given heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the None of these Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall Heat flux at the wall to that across the entire pipe None of these Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall Heat flux at the wall to that across the entire pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, Results in abruptly increased velocity Results in making part of the heating surface inactive None of these Provide very large heat transfer co-efficient Results in abruptly increased velocity Results in making part of the heating surface inactive None of these Provide very large heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
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