The type of liquor circulation system to be ' employed in evaporators (viz. natural or forced circulation) is determined mainly by the __________ of the liquid.

Related MCQs

• Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?
• Forced circulation evaporators are normally used for concentrating liquids having
• 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the liquid is 1500 W/m2.°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be
• In case of evaporators, liquid entrainment results primarily due to
• The separation of liquid droplets from the vapor is done by a/an __________, in the evaporators.
• In forced circulation, the heating element is injected
• Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?
• LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counter-flow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the __________ flow.
• It is not preferable to use superheated steam in evaporators, because of its very
• Open pan evaporators are preferred to be used, when the solution to be concentrated is