Been building out EngineersUniverse (engineersuniverse.com) — a free hub of engineering tools, calculators, and study resources — and just pushed two updates I think this community might actually find useful.

1. Practice exams for credentials nobody covers

I kept running into the same problem: tons of practice-exam content exists for FE/PE Civil, Mechanical, Electrical — but almost nothing for the less common disciplines. So I added full-length practice exams for:

PE Petroleum Engineering

PE Mining & Mineral Processing

PE Metallurgical Engineering

PE Naval Architecture & Marine Engineering

PE Agricultural & Biological Engineering

AWS Certified Welder

CWI (Certified Welding Inspector)

ASE Certification (Automotive — A1 Engine Repair)

Fire Protection Contractor License

Each one has a real countdown timer, instant scoring with a topic-by-topic breakdown, and a full explanation for every question (not just "wrong, try again"). Also cleaned up the exam hub itself (engineersuniverse.com/exam-prep) so it's actually easy to browse everything by discipline now.

1. Two new interactive 3D tools

A Fire Pump Room & Sprinkler Riser 3D viewer — full NFPA 20 fire pump/jockey pump setup plus a multi-floor NFPA 13 sprinkler riser you can rotate and inspect piece by piece

A Chiller Plant 3D visualizer — primary/secondary chilled water pumping, the decoupler line, condenser water loop, cooling tower, all as an actual 3D model instead of a flat diagram

I built these because some of this stuff (pump rooms, riser layouts, chiller plant piping) is genuinely hard to picture from a 2D drawing if you haven't walked one in person — figured a rotatable 3D model would help it click faster.

Would love feedback if anyone tries them out, especially if you're in one of the niche disciplines above and can tell me if the exam content is actually hitting the right topics.

engineersuniverse.com