Heat Transfer Operations Mock Test 7

1. In a triple effect evaporator, given the enthalpies as and the flow rates
Feed rate = 25000kg/hr at 38℃, Feed conc = 0.10, Product conc = 0.50
Find the evaporate rate in 1^st effect.

2. When we take a point between the Boiling line and the freezing line in an enthalpy concentration diagram, then the mixture can exist in _______ in that particular point.

3. The _________ represents the line of 100% secondary liquid concentration in an enthalpy concentration diagram.

4. What is the name of the point circled in the following boiling curve of water?

5. Which type of feeding is supposed to give maximum economy to a particular consumption?

6. In a fire tube boiler, the water to be heated is kept in the ________

7. What is the vapour phase enthalpy of mixture of water and ethanol if the mixture composition on 35% and the temperature of mixture is 87℃?

8. In a triple effect evaporator, given the enthalpies as and the flow rates calculate the product formation rate in the 2^nd effect.
Feed rate = 25000kg/hr at 38^oC, Feed conc = 0.10, Product conc = 0.50
Find the steam consumption rate.

9. Which one of the following evaporator can work without pump?

10. What is the vapour phase composition if the isothermal temperature is 87℃ and the mixture composition is 30%?