Heat Transfer Heat transfer co-efficient (h1) for liquids increases with Increasing temperature Decreasing Reynolds number Decreasing temperature None of these Increasing temperature Decreasing Reynolds number Decreasing temperature None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Volume to surface area Surface area to volume Surface area to perimeter Perimeter to surface area Volume to surface area Surface area to volume Surface area to perimeter Perimeter to surface area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is correct ? Rate = Driving force x Resistance Resistance = Driving force x Rate Rate = Resistance/Driving force Driving force = Rate x Resistance Rate = Driving force x Resistance Resistance = Driving force x Rate Rate = Resistance/Driving force Driving force = Rate x Resistance ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is 150 133 125 160 150 133 125 160 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m².s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m²/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is 5000 4000 6000 2000 5000 4000 6000 2000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a perfectly transparent surface (like gases), the Reflectivity = 0 Absorptivity = 0 All of these Transmissivity = 1 Reflectivity = 0 Absorptivity = 0 All of these Transmissivity = 1 ANSWER DOWNLOAD EXAMIANS APP
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