Heat Transfer In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator. Decreases May increase or decrease, depends on the vacuum Remains constant Increases Decreases May increase or decrease, depends on the vacuum Remains constant Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Low thermal conductivity of heat insulating materials is due to its High specific heat None of these High proportion of air space Dense structure High specific heat None of these High proportion of air space Dense structure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Black liquor generated during paper manufacture is concentrated in a multiple effect evaporator single effect evaporator multiple effect evaporators followed by a crystalliser single effect evaporator followed by a crystalliser multiple effect evaporator single effect evaporator multiple effect evaporators followed by a crystalliser single effect evaporator followed by a crystalliser ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy dT/dZ = 0 d²T/dZ² = 0 d²T/dZ² > 0 d²T/dZ² < 0 dT/dZ = 0 d²T/dZ² = 0 d²T/dZ² > 0 d²T/dZ² < 0 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant Both B & C Both will absorb equal amount of radiation from the surrounding in the beginning Both the spheres will emit equal amount of radiation per unit time in the beginning The cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant Both B & C Both will absorb equal amount of radiation from the surrounding in the beginning Both the spheres will emit equal amount of radiation per unit time in the beginning ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil ANSWER DOWNLOAD EXAMIANS APP
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