Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Both A & B Prandtl & Grashoff Grashoff Reynolds Both A & B Prandtl & Grashoff Grashoff Reynolds ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would Decrease First increase and then decrease First decrease and then increase Increase Decrease First increase and then decrease First decrease and then increase Increase ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical? 1 0.5 80 1.5 1 0.5 80 1.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of a multiple effect evaporator depends upon the Neither A nor B Rate of heat transfer Both A and B Heat balance consideration Neither A nor B Rate of heat transfer Both A and B Heat balance consideration 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 An insulator should have 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 A porous structure ANSWER DOWNLOAD EXAMIANS APP
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