CodeSafe

Trade exam prep platform

Modern prep for skilled trades

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.

Taking a live supervised assessment? Use the separate secure assessment flow with a class code. Practice and mock exam prep remain unchanged inside the main CodeSafe training product.

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

Safety78%
Fuel / Ignition64%
Diagnostics91%

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

3 license paths

Start with your license path, train by topic, and review clear explanations built around real gas trade logic.

Enter trade path →

OBT2 & OBT3 exam prep

Oil Burner Technician

2 license paths

Train on oil burner fundamentals, combustion, controls, service logic, and exam-style troubleshooting across both oil burner license levels.

Enter trade path →

Class 4A & 4B exam prep

Power Engineer

2 exam paths

Train on plant systems, boilers, controls, maintenance logic, safety, and operating decisions through a dedicated power engineer lane.

Enter trade path →

Construction & Maintenance

Electrician 309A

Now live

Train with code-based reasoning, calculations, wiring methods, services, motors, and exam-style troubleshooting.

Enter trade path →

Steamfitter / Pipefitter prep

Steamfitter 307A

Now live

Practice with pressure systems, piping layouts, rigging, installation, heating systems, and real exam logic.

Enter trade path →

Sheet Metal Worker prep

Sheet Metal 308A

Now live

Build confidence across layout, fabrication, fastening, blueprints, duct systems, and practical trade questions.

Enter trade path →

Plumbing mechanic prep

Plumber 306A

Now live

Train on code, drainage, venting, water distribution, fixtures, sizing, and practical plumbing troubleshooting.

Enter trade path →

Automotive Service Technician

Automotive 310S

Now live

Sharpen diagnostics, systems knowledge, inspections, electrical understanding, and exam confidence with structured practice.

Enter trade path →

Truck and Coach Technician

Truck & Coach 310T

Now live

Build confidence across inspections, brakes, suspension, drivetrain, electrical, and real-world heavy-duty diagnostics.

Enter trade path →

Industrial Mechanic Millwright

Millwright 433A

Now live

Strengthen your understanding of alignment, bearings, hydraulics, power transmission, rigging, and maintenance reasoning.

Enter trade path →

Welder trade prep

Welder 456A

Now live

Practice trade knowledge across welding processes, joints, positions, symbols, safety, materials, and shop reasoning.

Enter trade path →

Elevating Devices Mechanic

Elevating Devices 636E

Now live

Train on elevating systems, controls, safety devices, components, maintenance logic, and exam-style technical review.

Enter trade path →

Refrigeration & Air Conditioning

HVAC 313A

Now live

A future-ready trade path for refrigeration and air conditioning systems mechanics with strong diagnostic and systems-based prep.

Enter trade path →

Residential Air Conditioning Systems Mechanic

Residential AC 313D

Now live

Build confidence across residential cooling systems, controls, electrical, airflow, charging, and service reasoning.

Enter trade path →

Heavy Duty Equipment Technician

Heavy Duty Equipment 421A

Now live

Practice hydraulics, powertrain, electrical, diesel systems, inspections, and equipment troubleshooting with exam-style structure.

Enter trade path →

Industrial Electrician exam prep

Industrial Electrician 442A

Now live

Build confidence across three-phase systems, transformers, motors, grounding, controls, safety, and industrial troubleshooting.

Enter trade path →

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.

Gas Technician (G3)

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.

Active trade
Gas Technician (G3)
Auto-rotating
Gas Technician (G3)
Gas Technician (G2)
Gas Technician (G1)
Oil Burner Technician (OBT3)
Oil Burner Technician (OBT2)

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.