Heat Transfer Operations Practice Test 6

1. Which one of the following is not a disadvantage of agitated film evaporator?

2. Boiling point elevation causes the driving force of evaporation in the fluid to _________

3. What is defined by the term Evaporator Capacity?

4. Boiling point of the solution ________ as the evaporation process proceeds.

5. The Residence tie in forced convection evaporators is ________ than natural convection evaporator.

6. What is the pressure used for thermal desalination of water in climbing film evaporators?

7. Determine the Boiling point of solution if the mole fraction is 0.2 and pure water boiling point is 100℃.

8. The fluids in falling tube evaporator usually form a film inside the tubes but there are applications when the fluid forms a film outside the tube and falls subsequently.

9. Which one of the following is not a use of climbing tube evaporator?

10. What is the value of Evaporator Economy if we have a feed of 30kg at 25℃ and with evaporator consumption as 10kg/hr?
Latent heat of vaporization of water = 2,260 kJ/kg
Specific heat capacity = 6 KJ/Kg K