Heat Transfer All analogy equations connecting friction factor and heat transfer co-efficient apply only to Form friction Turbulent flow Both A and B Wall or skin friction Form friction Turbulent flow Both A and B Wall or skin friction ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchanger tubes are never made of Plain carbon steel Lead Copper Stainless steel Plain carbon steel Lead Copper Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) α ≠ 1, ε = 1 α = 1; ε ≠ 1 α = 1; ε = 1 α ≠ 1, ε ≠ 1 α ≠ 1, ε = 1 α = 1; ε ≠ 1 α = 1; ε = 1 α ≠ 1, ε ≠ 1 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 Cylinder Cube Equal for all the three Sphere Cylinder Cube Equal for all the three Sphere ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Volume to surface area Surface area to perimeter Surface area to volume Perimeter to surface area Volume to surface area Surface area to perimeter Surface area to volume Perimeter to surface area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For condensation of pure vapors, if the heat transfer co-efficients in filmwise and drop-wise condensation are respectively hf and hd, then hf could be greater or smaller than hd hf = hd hf > hd hf < hd hf could be greater or smaller than hd hf = hd hf > hd hf < hd ANSWER DOWNLOAD EXAMIANS APP
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