EXAMIANS
For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in
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Solid angle subtended by the finite surface at the radiating element is
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A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is
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The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid
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Baffles are provided in heat exchangers to increase the
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Evaporator tubes are generally
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Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the
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A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is
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Baffle spacing
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Viscous & heat sensitive liquids are concentrated in __________ evaporators.
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