Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 0 and 1 1 and 0 0 and 0.5 1 and ? 0 and 1 1 and 0 0 and 0.5 1 and ? ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally Increases Increases exponentially Remains unchanged Decreases Increases Increases exponentially Remains unchanged Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a None of these Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Factor of safety Non-dimensional factor None of these Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Factor of safety Non-dimensional factor 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 1/εx + 1/εy (εx + εy)/(εx + εy - εx . εy) Εx + εy Εx . εy 1/εx + 1/εy (εx + εy)/(εx + εy - εx . εy) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer LMTD for counterflow and prallel flow heat exchanger will be the same, when the Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid) Outlent temperature of both the hot and cold fluid are same None of these Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid) Outlent temperature of both the hot and cold fluid are same None of these Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Grashhoff number is given by gD2βΔtρ/μ² gD³.β.Δtρ²/μ² gD³βΔtP²/μ gD2βΔtP²μ gD2βΔtρ/μ² gD³.β.Δtρ²/μ² gD³βΔtP²/μ gD2βΔtP²μ ANSWER DOWNLOAD EXAMIANS APP
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