Heat Transfer Operations Practice Test 7

1. Parallel feed is almost the same as forward feed in an evaporator.

2. Which one of the following is not a classification of boilers?

3. The efficiency of the steam plant decreases by using superheated steam plants owing to the increased cost and consumption of fuels.

4. We have a triple effect evaporator which has steam supply of 5kg/hr, the setup is a forward pass setup, feed enters the 1st setup at 10kg/hr of 50% concentration and leaves the final effect at 75% concentration. What is the product discharged from this setup?

5. The concentration of the feed in parallel feed evaporator ____________ with subsequent effects if pressure decreases.

6. In the given setup, what is the capacity of this forward feed evaporator?

7. Which one of the following is the correct equation for enthalpy balance for the 1^st effect in a triple effect evaporator?

8. Which one of the following represents Nucleate boiling region in the given boiling curve?

9. 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℃?

10. The boiling point of the solution ________ as we move to subsequent effects in a backward feed evaporator.