Heat Transfer Multiple effect evaporation is generally recommended, when the Evaporation on small scale is to be done Large scale evaporation of liquor is needed Corrosive liquids are to be concentrated Fuel is cheaply available Evaporation on small scale is to be done Large scale evaporation of liquor is needed Corrosive liquids are to be concentrated Fuel is cheaply available ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam economy in case of a triple effect evaporator will be 1 > 1 Between 0 and 1 < 1 1 > 1 Between 0 and 1 < 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when KA>2 kB KA < 0.5kB CPA < CPB CPA > CPB KA>2 kB KA < 0.5kB CPA < CPB CPA > CPB ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a forward feed multiple effect evaporator unit None of these No pump is required to withdraw the product from the last effect Viscosity of liquid is highest in first effect Transfer from effect to effect is done by pumps None of these No pump is required to withdraw the product from the last effect Viscosity of liquid is highest in first effect Transfer from effect to effect is done by pumps ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will Increase Decrease Remain unchanged Either increase or decrease; depends on the coolant flow rate Increase Decrease Remain unchanged Either increase or decrease; depends on the coolant flow rate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 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 51 min 15 min 44 min 22 min 51 min 15 min 44 min 22 min ANSWER DOWNLOAD EXAMIANS APP
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