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# ME6503 Design of Machine Elements Question Bank

ME6503 Design of Machine Elements Question Bank Regulation 2013 Anna University free download. Design of Machine Elements ME6502 Question Bank pdf free download.

## Sample ME6503 Design of Machine Elements Question Bank:

PART – A

1. What is Convective heat transfer?

2. Sketch formation of boundary layer and show laminar, transition & turbulent flow.

3. Write down differential equation for Continuity of fluid flow.

4. State Newton’s law of cooling. (ME6503 Design of Machine Elements Question Bank)

5. Differentiate between Natural & Forced convection.

6. State Buckingham’s 1t’theorem.

7. What is meant by Dimensional analysis?” ,

8. Sketch boundary layer development in a circular pipe.

9. What is Reynolds analogy? (ME6503 Design of Machine Elements Question Bank)

10. What is Colburn analogy?

11. Define the Bulk temperature.

12. Define velocity boundary layer thickness.

13. Define thermal boundary layer thickness. (ME6503 Design of Machine Elements Question Bank)

14. Distinguish between laminar & turbulent flow.

15. What is meant by critical Reynolds number?

16. Define skin friction coefficient.

17. Give examples for free convection. (ME6503 Design of Machine Elements Question Bank)

18. Define Grashof number.

19. Sketch, temperature and velocity profiles in free convection on a vertical wall.

20. Define momentum thickness.

21. Define Displacement thickness. (ME6503 Design of Machine Elements Question Bank)

22. List the dimensionless numbers.

23. What are the uses of dimensional analysis?

24. Explain the term Dimensional homogeneity.

25. What are the limitations of Dimensional analysis? (ME6503 Design of Machine Elements Question Bank)

PART – B

1. Air at 200 kPa and 200°C is heated as it flows through a tube with a diameter of 25 mm at a velocity of 10 m./sec. The wall temperature is maintained constant and is 20°C above the air temperature all along the length of tube. Calculate:
(i) The rate of heat transfer per unit length of the tube.
(ii) Increase in the bulk temperature of air over a 3 m length of the tube. (16) (ME6503 Design of Machine Elements Question Bank)

2. Write down the momentum equation for a steady, two dimensional flow of an incompressible, constant property Newtonian fluid in the rectangular coordinate system and mention the physical significance of each term. (6)

A large vertical plate 5 m high is maintained at 100°C and exposed to air at 30°C. Calculate the convection heat transfer coefficient. (10)

(ME6503 Design of Machine Elements Question Bank)

 Subject Name Design of Machine Elements Subject code ME6503 Regulation 2013