Heat Transfer Among liquids, water has a comparatively high value of thermal conductivity, due to its High viscosity Dense structure Partial ionisation Low density High viscosity Dense structure Partial ionisation Low density ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Harmonic mean temperature difference is given by √(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) 2.(ΔT₁ . ΔT₂)(ΔT₁ - ΔT₂) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is > 1 > 5 < 1 1 > 1 > 5 < 1 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In sub-cooled boiling, 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 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 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for Sphere Equal for all the three Cube Cylinder Sphere Equal for all the three Cube Cylinder ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are used because it occupies less floor area because it is less costly when heat transfer area required is very high when heat transfer area required is very low because it occupies less floor area because it is less costly when heat transfer area required is very high when heat transfer area required is very low ANSWER DOWNLOAD EXAMIANS APP
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