Computer Aided Design - October 1998

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1. What is meant by CPU?
2. What are the various output devices?
3. What is an assembly language?
4. What is meant by Hierarch in computer operations?
5. What is meant by dew point?
6. Differentiate between ideal and nonideal mixtures.
7. What is an azeotrope?
8. Define activity coefficient.
9. What are the disadvantages of a fixed tube sheet heat exchanger?
10. What ranges of velocities are to be considered for gases in heat exchangers?
11. Define boiling point elevation.
12. Differentiate between an evaporator and a reboiler.
13. What are the standard lengths adopted in shell and tube heat exchangers?
14. What is the function of the downtake pipe in a calendria evaporator?
15. What are the advantages of backward feed in multiple effect evaporation?
16. What is absorption factor?
17. Name the methods used for the determination of number of plates for multicomponent systems.
18. Name the types of trays used for distillation operation.
19. What assumptions are implied in the McCabe and Thiele method?
20. What methods are available for the determination of equilibrium data of nonideal mixtures? Part B (5 x 12 = 60 Marks)
21. Write in detail on the elements of computer architecture. Or
22. Explain in detail central processing unit. Write in detail how the unit works.
23. Develop an algorithm for the determination of bubble point and dew point using vapor pressure data. Or
24. Write a program for generating equilibrium data of a binary non-ideal mixture.
25. Write down the stepwise procedure for the design of shell and tube heat exchanger. Or
26. Write a design program for the estimation of number of hair-pins of double pipe exchanger for cooling a hot fluid using water as a cooling medium.
27. (a) What are the different types of evaporators? How do you choose an evaporator for a given process? (6)
    (b) How do you solve the balance equations of a multiple effect evaporator? Explain the nummerical method that can be used successfully. (6) Or
28. Give the stepwise procedure of design of a short-tube calendria evaporator.
29. Develop an algorithm for the design of a multistage distillation column. Or
30. Explain the stepwise procedure for the design of absorption towers.

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