Heat Transfer For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally Increases exponentially Decreases Increases Remains unchanged Increases exponentially Decreases Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Harmonic mean temperature difference is given by 2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂) (ΔT₁ - ΔT₂)/(ΔT₁ . ΔT₂) 2.(ΔT₁ . ΔT₂)/(ΔT₁ + ΔT₂) √(ΔT₁ . ΔT₂) 2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂) (ΔT₁ - ΔT₂)/(ΔT₁ . ΔT₂) 2.(ΔT₁ . ΔT₂)/(ΔT₁ + ΔT₂) √(ΔT₁ . ΔT₂) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T² None of these Q ∝ T⁴ Q ∝ T³ Q ∝ T² None of these Q ∝ T⁴ Q ∝ T³ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The number of kg vaporised per kg of steam fed to the evaporator is defined as Rate of vaporisation Rate of evaporation Economy Capacity Rate of vaporisation Rate of evaporation Economy Capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam side heat transfer co-efficient in an evaporator is in the range of __________ kcal/hr.m²°C. 1000-1500 5000-15000 18537 100-500 1000-1500 5000-15000 18537 100-500 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A black body does not __________ radiation. Refract Absorb or emit Reflect Both B & C Refract Absorb or emit Reflect Both B & C ANSWER DOWNLOAD EXAMIANS APP
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