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 0.55 0.45 0.85 0.35 0.55 0.45 0.85 0.35 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The film thickness for laminar film condensation on vertical surface __________ from top to bottom. Cummulatively decreases Remains constant Cummulatively increases And the surface conductance increase Cummulatively decreases Remains constant Cummulatively increases And the surface conductance increase ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, The relationship is not generalised The temperature drops in the two fluids and the wall are proportional to individual resistances There is no relationship between temperature drop and resistance The temperature drop is inversely proportional to the resistance across which the drop occurs The relationship is not generalised The temperature drops in the two fluids and the wall are proportional to individual resistances There is no relationship between temperature drop and resistance The temperature drop is inversely proportional to the resistance across which the drop occurs ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the total emissivity of conductors Decreases Decreases linearly Increases Remains same Decreases Decreases linearly Increases Remains same ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest overall heat transfer co-efficient? Molten sodium Dowtherm Water Air Molten sodium Dowtherm Water Air ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer According to Reynolds analogy, Stanton number is equal to (where, f = Fanning friction factor) 2f f f/2 f/4 2f f f/2 f/4 ANSWER DOWNLOAD EXAMIANS APP
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