Heat Transfer Harmonic mean temperature difference is given by 2.(ΔT₁ . ΔT₂)/(ΔT₁ + ΔT₂) (ΔT₁ - ΔT₂)/(ΔT₁ . ΔT₂) √(ΔT₁ . ΔT₂) 2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂) 2.(ΔT₁ . ΔT₂)/(ΔT₁ + ΔT₂) (ΔT₁ - ΔT₂)/(ΔT₁ . ΔT₂) √(ΔT₁ . ΔT₂) 2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The film thickness for laminar film condensation on vertical surface __________ from top to bottom. Remains constant Cummulatively decreases And the surface conductance increase Cummulatively increases Remains constant Cummulatively decreases And the surface conductance increase Cummulatively increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In sub-cooled boiling, Temperature of the heating surface is more than the boiling point of the liquid Temperature of the heating surface is less than the boiling point of the liquid Bubbles from heating surface are absorbed by the mass of the liquid Very large vapour space is necessary Temperature of the heating surface is more than the boiling point of the liquid Temperature of the heating surface is less than the boiling point of the liquid Bubbles from heating surface are absorbed by the mass of the liquid Very large vapour space is necessary ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Uneconomic LMTD Its evaporation loss Decrease in heat exchanger efficiency Excessive corrosion Uneconomic LMTD Its evaporation loss Decrease in heat exchanger efficiency Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C. 1.49 4.88 1 None of these 1.49 4.88 1 None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which type of heat exchanger is preferred for heavy heat loads ? None of the listed here Plate fine Double pipe Series and parallel set of shell and tube None of the listed here Plate fine Double pipe Series and parallel set of shell and tube ANSWER DOWNLOAD EXAMIANS APP
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