Mechanical Interview Questions

Mechanical Interview Questions which can give jitters to any candidate during interviews and make them feel uneasy. Mechanical engineering is the discipline that applies engineering, physics, and materials science principles to design, analyze, manufacture, and maintain mechanical systems. It is the branch of engineering that involves the design, production, and operation of machinery. It is one of the oldest and broadest of the engineering disciplines.

The mechanical engineering field requires an understanding of core areas including mechanics, kinematics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), and product life cycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others.

So to get an idea of the most probably questions asked in a mechanical engineering interview are:

  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?

All the best!

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