Advanced service logic
Focus on the OBT2 decisions that come up in real service and exam scenarios.
Oil Burner Technician OBT2
OBT2 prep for combustion, controls, tune-ups, and service diagnostics.
Train on advanced oil burner service logic: combustion, wiring, safety controls, burner adjustment, draft, diagnostics, and code-based decisions.
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CODESAFE ACADEMYPRODUCT DEMOPracticeMock examsAnswer review
Electrical fundamentalsSample question
A 24 V circuit has 6 Ω resistance. What current flows?
A2 A
B4 A
C6 A
Understand the answer.Ohm’s law: I = V ÷ R. Divide 24 by 6 to get 4 amperes.
Illustrative demo · no saved progressTrade-specific practice
More than a right or wrong answer.Build the understanding behind the score.
Practice with a purpose
A stronger foundation for exam day.
Combustion and controls
Tie burner behavior, wiring, draft, safety devices, and tune-ups together.
Clean exam flow
Practice with a serious interface and clear review instead of a loose quiz list.
Connect the dots
Build your understanding, topic by topic.
Use focused practice to revisit the systems, skills and concepts in your trade. Bring what you learn into your next mock exam.
Try a free practice setSafety
Combustion
Burner Controls
Tune-Up
Draft & Venting
Electrical Checks
Code Decisions
Diagnostics
Your trade exam deserves a game plan.
Start with 30 free questions. Find the gaps. Build your exam confidence.