Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. May increase or decrease; depends on the liquid Remains unchanged Increases Decreases May increase or decrease; depends on the liquid Remains unchanged Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling? Diagonal square pitch None of these Square pitch Triangular pitch Diagonal square pitch None of these Square pitch Triangular pitch ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by Εx + εy Εx . εy (εx + εy)/(εx + εy - εx . εy) 1/εx + 1/εy Εx + εy Εx . εy (εx + εy)/(εx + εy - εx . εy) 1/εx + 1/εy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The advantage of backward feed multiple effect evaporators over forward feed units is that Most concentrated liquid is at highest temperature There is no additional cost of pumping Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled Most concentrated liquid is at highest temperature There is no additional cost of pumping Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A sphere of radius 'R₁' is enclosed in a sphere of radius 'R₂'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is 1 R₂/(R₁+R₂) (R₁/R₂)2 1 R₂/(R₁+R₂) (R₁/R₂)2 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
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