MASS TRANSFER-2 MODEL QUESTION PAPER DIPLOMA IN CHEMICAL ENGINEERING 6TH SEMESTER

 

MODEL QUESTION PAPER

SUBJECT: MASS TRANSFER – II

SUBJECT CODE : 9CH61

INSTRUCTIONS

  1. Question no. 1 is compulsory.
  2. Answer any two full questions from each sections.

 

1.a. Fill in the blanks:                                                                                           1 x 5

i. The reverse of absorption operation is _________.

 

ii. Preparation of coffee/ tea is a domestic example of __________.

iii. In extraction the value of selectivity  of solvent should be______________.

iv. As temperature increases the rate of adsorption __________________.

v.  In vaccum crystallizer the supersaturation is attained by __________________.

 

b. Write a short note on the characteristics of packing materials.                                      5

 

SECTION-I

 

2. a. Explain the types of absorption with examples.                                                         5

    b. Describe the construction of tray towers for absorption operation with neat 

           figure.                                                                                                                    5+5

3.a. Explain briefly minimum liquid-gas ratio.                                                                  7

    b.  Discuss the types of packing materials with figures.                                                8     

4. a. Describe regular and random packing methods.                                                         8                                                                         

    b. Explain flooding & loading in packed towers.                                                           7                                                                                     

 

 

 

SECTION-II

 

5. Explain with a neat sketch the construction & use of triangular charts in liquid 

     extraction.                                                                                                                          8+7

6. a. Discuss the factors to be considered while selecting a solvent for liquid extraction.7

    b .Describe the construction & working of sieve tray columns.                                          8                                                               

7. a. List leaching equipments with specific applications.                                                       5

    b. Describe the construction & working of Robert diffusion battery.                                5+5

 

SECTION-III

8. a. Discuss the preparation & applications of any three industrial adsorbents.                3x5

9. a. Explain the principles of Crystallization.                                                                      5

    b. Describe the working of Swenson walker Crystallizer with figure.                            5+5

 

10. Write short notes on                                                                                                      3x 5

      a. Adsorption equilibrium.

      b. Supercritical fluid extraction.

     c. Reverse osmosis.

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