“I was nervous going into the G3, but after a few nights on CodeSafe I stopped second-guessing myself. I passed first attempt and walked out feeling like the prep actually matched the pressure of the real exam.”
CodeSafe
Trade exam prep platform
The premium exam prep platform for the trades.
Start with your trade. Train with focused practice, clean mock exam flow, and explanations that help you actually understand the work.
Focused
Practice paths
Detailed
Answer explanations
Premium
User experience
CodeSafe Dashboard
Preview concept
Current focus
Gas Technician
License path
G1 / G2 / G3
Mode
Mock + Review
Built to scale across multiple trades.
Structured practice instead of scattered question dumps.
Made to feel serious, clean, and modern from day one.
Choose your trade
One platform. Separate paths for each trade.
Start broad at the platform level, then drill into a trade-specific experience that feels focused and intentional.
G1, G2 & G3 exam prep
Gas Technician
Start with your license path, train by topic, and review clear explanations built around real gas trade logic.
OBT2 & OBT3 exam prep
Oil Burner Technician
Train on oil burner fundamentals, combustion, controls, service logic, and exam-style troubleshooting across both oil burner license levels.
Class 4A & 4B exam prep
Power Engineer
Train on plant systems, boilers, controls, maintenance logic, safety, and operating decisions through a dedicated power engineer lane.
Construction & Maintenance
Electrician 309A
Train with code-based reasoning, calculations, wiring methods, services, motors, and exam-style troubleshooting.
Steamfitter / Pipefitter prep
Steamfitter 307A
Practice with pressure systems, piping layouts, rigging, installation, heating systems, and real exam logic.
Sheet Metal Worker prep
Sheet Metal 308A
Build confidence across layout, fabrication, fastening, blueprints, duct systems, and practical trade questions.
Plumbing mechanic prep
Plumber 306A
Train on code, drainage, venting, water distribution, fixtures, sizing, and practical plumbing troubleshooting.
Automotive Service Technician
Automotive 310S
Sharpen diagnostics, systems knowledge, inspections, electrical understanding, and exam confidence with structured practice.
Truck and Coach Technician
Truck & Coach 310T
Build confidence across inspections, brakes, suspension, drivetrain, electrical, and real-world heavy-duty diagnostics.
Industrial Mechanic Millwright
Millwright 433A
Strengthen your understanding of alignment, bearings, hydraulics, power transmission, rigging, and maintenance reasoning.
Welder trade prep
Welder 456A
Practice trade knowledge across welding processes, joints, positions, symbols, safety, materials, and shop reasoning.
Elevating Devices Mechanic
Elevating Devices 636E
Train on elevating systems, controls, safety devices, components, maintenance logic, and exam-style technical review.
Refrigeration & Air Conditioning
HVAC 313A
A future-ready trade path for refrigeration and air conditioning systems mechanics with strong diagnostic and systems-based prep.
Residential Air Conditioning Systems Mechanic
Residential AC 313D
Build confidence across residential cooling systems, controls, electrical, airflow, charging, and service reasoning.
Heavy Duty Equipment Technician
Heavy Duty Equipment 421A
Practice hydraulics, powertrain, electrical, diesel systems, inspections, and equipment troubleshooting with exam-style structure.
Industrial Electrician exam prep
Industrial Electrician 442A
Build confidence across three-phase systems, transformers, motors, grounding, controls, safety, and industrial troubleshooting.
About CodeSafe
Built from trade pressure, not from generic ed-tech ideas.
CodeSafe is designed to feel premium because the people using it are serious. The goal is not just to help users click through questions — it’s to help them prepare with structure, clarity, and confidence.
Built for tradespeople
Focused, practical prep designed around the way technicians actually learn and troubleshoot.
Mock exams with review
Train under pressure, then go back through explanations to tighten weak areas fast.
Clean and premium
A serious, modern experience that feels more like a polished platform than a random quiz site.
Testimonials
Trusted by apprentices across the skilled trades
Real feedback from apprentices and tradespeople using CodeSafe to build confidence before exam day.
Start now
Start with the trade. Build from there.
Gas Technician includes G3, G2, and G1. Oil Burner Technician includes OBT3 and OBT2. Power Engineer includes Class 4A and 4B. CodeSafe now spans Electrician 309A, Industrial Electrician 442A, Steamfitter 307A, Sheet Metal 308A, Plumber 306A, Automotive 310S, Truck & Coach 310T, Millwright 433A, Welder 456A, Elevating Devices 636E, HVAC 313A, Residential AC 313D, and Heavy Duty Equipment 421A.