Mechanical Design Interview Questions

2,451 mechanical design interview questions shared by candidates

Hiring manager - Experiences HR - Answering questions and showing the org chart Memebrs of team - Explain the design of a electric toothbrush, how it vibrates, how it charges, how its operated, why. Show and tell of some parts they had. Manager - Redesign this shaft with bearings. Manager - Situational questions, how youd deal with confilt in the office For all bar the redesign of the shaft one it was fair. The shaft one was the first time he had asked the questions and it felt like he had a particular answer in mind. I often would describe what i would do, he would say no thats not it and then say a very similar thing.
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Mechanical Design Engineer

Interviewed at Cambridge Consultants

4.2
Feb 22, 2023

Hiring manager - Experiences HR - Answering questions and showing the org chart Memebrs of team - Explain the design of a electric toothbrush, how it vibrates, how it charges, how its operated, why. Show and tell of some parts they had. Manager - Redesign this shaft with bearings. Manager - Situational questions, how youd deal with confilt in the office For all bar the redesign of the shaft one it was fair. The shaft one was the first time he had asked the questions and it felt like he had a particular answer in mind. I often would describe what i would do, he would say no thats not it and then say a very similar thing.

1. Explain LMC, MMC, & RFS. Give its symbol (GD&T) 2. What is Bonus Tolerance 3. What is the difference between concentricity and circular run out? 4. The stress strain curve, Elastic limit? 5. Write Bending Equation 6. What is Factor of Safety? 7. SFD & BMD of simply supported load beam with point load. 8. What is fatigue? 9. Draw and explain SN Curve? 10. Draw and explain Goodman Soderberg Gerber Diagram? 11. Explain Reverse stress and repeated stresses 12. Explain Endurance Limit 13. What is stress concentration and stress concentration factor? 14. What are the methods to reduce stress concentration? 15. What is notch sensitivity? 16. Write the 5 theories of failure? 17. Difference between ductile and brittle materials and failure. 18. Criteria from material selection 19. Steps in product development 20. What is toughness 21. Types of loads/stresses acting on machine components 22. What is principle plane and principal stresses 23. One Tolerance stack up analysis problem – find tolerance for a notch 24. Table problem with point load (Yield Strength = 1000 N/mm2, Load = 100 N) 25. Hollow shaft or solid shaft carried more torque? 26. What is FMEA? What is it used for?
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Mechanical Design Engineer

Interviewed at Siemens

4
Jun 5, 2021

1. Explain LMC, MMC, & RFS. Give its symbol (GD&T) 2. What is Bonus Tolerance 3. What is the difference between concentricity and circular run out? 4. The stress strain curve, Elastic limit? 5. Write Bending Equation 6. What is Factor of Safety? 7. SFD & BMD of simply supported load beam with point load. 8. What is fatigue? 9. Draw and explain SN Curve? 10. Draw and explain Goodman Soderberg Gerber Diagram? 11. Explain Reverse stress and repeated stresses 12. Explain Endurance Limit 13. What is stress concentration and stress concentration factor? 14. What are the methods to reduce stress concentration? 15. What is notch sensitivity? 16. Write the 5 theories of failure? 17. Difference between ductile and brittle materials and failure. 18. Criteria from material selection 19. Steps in product development 20. What is toughness 21. Types of loads/stresses acting on machine components 22. What is principle plane and principal stresses 23. One Tolerance stack up analysis problem – find tolerance for a notch 24. Table problem with point load (Yield Strength = 1000 N/mm2, Load = 100 N) 25. Hollow shaft or solid shaft carried more torque? 26. What is FMEA? What is it used for?

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