Heat Transfer The thermal boundary layer at NPr > 1 And the hydrodynamic boundary layer are identical Disappears Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical Disappears Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Pick out the correct equation. JH = (St)(Pr)2/3 = f/2 JH = (St)1/3(Pr) = f/2 JH = (St)2/3(Pr) = f/2 JH = (St)(Pr)1/3 = f/2 JH = (St)(Pr)2/3 = f/2 JH = (St)1/3(Pr) = f/2 JH = (St)2/3(Pr) = f/2 JH = (St)(Pr)1/3 = f/2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be 0.85 0.35 0.55 0.45 0.85 0.35 0.55 0.45 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires More space Less heating surface None of these Lower maintenance cost More space Less heating surface None of these Lower maintenance cost ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Heat transfer area Heat transfer co-efficient Temperature gradient Mechanical strength of the equipment Heat transfer area Heat transfer co-efficient Temperature gradient Mechanical strength of the equipment ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is >1 Zero 1 <1 >1 Zero 1 <1 ANSWER DOWNLOAD EXAMIANS APP
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