Heat Transfer The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) ∝ √t ∝ t Independent of 't' ∝ 1/t ∝ √t ∝ t Independent of 't' ∝ 1/t ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is obtained in __________ flow. Turbulent Laminar Creeping Transition region Turbulent Laminar Creeping Transition region ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thickness of condensate layer in filmwise condensation depends on the Surface configuration Liquid flow rate from the surface Condensation rate All of these Surface configuration Liquid flow rate from the surface Condensation rate All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multipass heat exchangers are used Because of simplicity of fabrication For low heat load To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication For low heat load To reduce the pressure drop To obtain higher heat transfer co-efficient and shorter tube 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 = hd 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 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of 1.74 1 6.1 37 1.74 1 6.1 37 ANSWER DOWNLOAD EXAMIANS APP
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