Other Bachelor Degree- DRYING TECHNOLOGY (Karunya University, Coimbatore-2010)

Reg. No. ________                                                                                                                                                   

Karunya University

(Karunya Institute of Technology and Sciences)

(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

 

End Semester Examination – November/December 2010

 

Subject Title: DRYING TECHNOLOGY                                                                                                      Time: 3 hours

Subject Code:            09FP202                                                                                                                Maximum Marks: 100          

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

Answer ALL questions

PART – A (10 x 1 = 10 MARKS)

 

1.         What is Dew point?

2.         Define Humid volume.

3.         Name two types of drum dryer.

4.         What is osmosis?

5.         Name the two types of atomizer for spray drying.

6.         Define atomizer.

7.         Define condensation.

8.         Name some industrial freeze dryer.

9.         What is meant by pneumatic drying?

10.       What are the materials dried in flash dryer?

 

PART – B (5 x 3 = 15 MARKS)

 

11.       Define the following term: Free moisture and Critical moisture content.

12.       Write short notes on Drum dryer.

13.       Bring out the significance of Foam Spray drying.

14.       What is Lyophilization?

15.       What is the difference between fluidizing bed drying and pneumatic drying?

 

PART – C (5 x 15 = 75 MARKS)

 

16.       Discuss the theory of diffusion drying and capillary theory of drying.

(OR)

17.  A wet slab of material weighing 5 kg originally contains 50% moisture on wet basis. The slab is 1mx0.6mx7.5cm thick. The equilibrium moisture is 5% on wet basis. Drying takes place from one face only. When in contact with air, the drying rate is given as below.

Wet slab weight	5.0	4.0	3.6	3.5	3.4	3.06	2.85
Drying Rate ‘N’ kg/hr.m2	5.0	5.0	4.5	4	3.5	2.0	1.0

            Draw a graph and explain.

 

18.       What are the factors to be considered while selecting the industrial dryer?

                               (OR)

19.       Explain the various types of Drum dryer with neat sketches.

20.       Explain the spray dryer with neat sketch.

                                  (OR)

21.  Suggest the suitable driers for pulp and powder food products and explain their principles.

[P.T.O]

 

 

22.  What is freezing? Explain its fundamentals.

                           (OR)

23.  Explain the industrially important freeze driers.

  24.  Describe pneumatic drying with a neat sketch.

                           (OR)

25.  Describe fluidized bed drying with neat sketch.

 

 

 

 

 

 

 

Earning:  ₹ 0.00/-