Heat Transfer For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally Increases Increases exponentially Remains unchanged Decreases Increases Increases exponentially Remains unchanged Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An insulator should have A porous structure Less resistance to heat flow High thermal conductivity Low thermal conductivity A porous structure Less resistance to heat flow High thermal conductivity Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe? 0.5 < 0.5 < 0.1 > 0.6 0.5 < 0.5 < 0.1 > 0.6 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are preferably useful, when Requirement of heat transfer area is low A corrosive liquid is to be heated Overall heat transfer co-efficient is very high High viscosity liquid is to be cooled Requirement of heat transfer area is low A corrosive liquid is to be heated Overall heat transfer co-efficient is very high High viscosity liquid is to be cooled ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Reason for operating an evaporator in multiple effect is to secure Increased capacity Both A and B Increased steam economy Decreased steam consumption Increased capacity Both A and B Increased steam economy Decreased steam consumption ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) (ΔT)² (ΔT)³ (ΔT)⁴ √(ΔT) (ΔT)² (ΔT)³ (ΔT)⁴ √(ΔT) ANSWER DOWNLOAD EXAMIANS APP
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