Practice. Model. Interview.

Master mechanical engineering, one problem at a time.

LeetCode-style practice for mechanical engineers. Solve 3D CAD challenges and sharpen your interview skills — all in one place.

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3D CAD Challenges

View engineering drawings, model the part in SolidWorks or Fusion 360, then submit your mass, center of gravity, or moment of inertia. Answers verified with engineering-grade tolerance.

CSWACSWPSheet MetalAssemblies

Interview Q&A

Practice classic mechanical engineering interview questions — stress-strain curves, material selection, thermodynamics, manufacturing processes. Multiple choice and short answer formats.

StaticsDynamicsThermodynamicsMaterials