006. Mechanical Interview Questions – Top 50 to Prepare

1. Explain the second law of thermodynamics.
2. What kinds of pipes are used for steam lines?
3. What is the difference between shear center flexural center of twist and elastic center?
4. What are the methods of extinguishing fire?
5. What are the precautions to be taken to avoid fire?
6. What safety precautions should be observed while working in the workshop?
7. What is a Drawing?
8. What is Engineering Drawing?
9. What do you mean by First Aid?
10. What is an accident?
11. What is the difference between Production and Manufacturing?
12. Though units for pressure and stress are same (i.e. N/mm2) what is the difference between stress and pressure?
13. Difference between ‘Thermodynamics and Heat Transfer’
14. Difference between Pipe and tube
15. Difference between Flywheel and Governor
16. Difference between tempering and annealing
17. How to calculate the weight of a thin plate of sheet and a tube?
18. Based on which law does distillation column, heat exchangers, compressors and pumps work?
19. a piece of concrete has density of 2300 kg/m3 and is 400 x 600 x 3000mm thick. It is lowered into the sea by a crane for an underwater construction project. Determine the tension in the rope of the crane
20. Is Pneumatic cylinder used as a hydraulic cylinder, if so how?
21. What is the difference between pinion and gear?
22. What is four stroke engine?
23. What is ferrite?
24. What is the difference between projectile motion and a rocket motion?
25. What is a cotter joint?
26. What is the alloy of tin and lead?
27. What does F.O.F. stand for in piping design?
28. Explain Otto cycle.
29. What is gear ratio?
30. What is annealing?
31. What are the standard sizes of drawing board as per Indian Standards?
32. What are the functions of a scale?
33. What is the use of mechanical engineer’s scale?
34. What is a Vernier Scale?
35. What is Drafting machine (Mini Drafter)?
36. What is a lettering?
37. What is ductile-brittle transition temperature?
38. What is a uniformly distributed load?
39. What are the differences between pneumatics and hydraulics?
40. Why Gothic style lettering is universally used in industry?
41. What are Section lines?
42. What is a Centre line?
43. What is a positive displacement pump?
44. Why would you use hydraulics rather than pneumatics?
45. What is enthalpy?
46. What is isometric drawing?
47. What are the advantages of gear drive?
48. Explain briefly the following lines used in engineeringdrawing?
49. What are Cutting Plane Lines?
50. Where pneumatic system is used?