Stress = force per unit area (Pa or psi). Strain = deformation per unit length (dimensionless). Use terms like yield strength, ultimate tensile strength, safety factor, and modulus of elasticity to show you think in design, not just repair.

GD&T defines shape, orientation, and location tolerances using standard symbols (flatness, concentricity, true position, etc.). Show you can read a drawing with feature control frames — this is a core skill in U.S. manufacturing.

Types: deep groove ball, angular contact, tapered roller, cylindrical roller, thrust bearings. Selection criteria: load type (radial vs axial), speed (rpm), temperature, vibration, and required service life (L10 calculation).

Mention specific software: SolidWorks, AutoCAD, CATIA, Inventor, NX. Describe a real project — dimensions, constraints, assemblies, drawing views. Even maintenance modifications count as design work.

Pascal's Law: pressure applied to fluid is transmitted equally in all directions. Components: pump, reservoir, control valve, actuator, filter, pressure relief valve. Slow cylinder: low pressure, internal leakage, contaminated fluid, worn seals.

Be specific: what was the design goal, what were the constraints (weight, cost, space, load), what trade-offs did you make, and what was the outcome. Show engineering thinking — not just "I made a bracket."

If yes: mention the software (ANSYS, SolidWorks Simulation), what you analyzed (stress, thermal, vibration), and how results changed your design. If no: be honest but show awareness: "I've studied FEA and understand its application — I'm eager to develop that skill."

Good engineers design for manufacturability (DFM). Example: avoiding tight tolerances that require expensive machining when casting tolerances are sufficient. Show awareness that the best design is one that can be made efficiently.

Use updated drawings with revision clouds, verbal walkthroughs, redlines, and confirm understanding by asking them to explain it back. Relationship with the shop floor is critical — show respect for their expertise.

Walk through a real example: "A shaft was breaking repeatedly. We asked 5 Whys and discovered the root cause was a misaligned coupling, which was misaligned because the mounting plate had a manufacturing defect." Get to the real root — not just the symptom.

Show you understand each stakeholder's priorities: production wants speed, quality wants zero defects, suppliers want clear specs and reasonable timelines. Your role as an engineer is to align all three — demonstrate that awareness.

This is your moment to show passion. Pick something real and specific — it doesn't have to be massive. Interviewers remember engineers who are genuinely excited about their work. Speak with enthusiasm and technical detail.