Foundation-first path
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Power Engineer Class 4B
4B prep for plant fundamentals, safety, boilers, and operating judgment.
Build a clean power engineering study lane around boilers, plant systems, safety, calculations, maintenance, and practical operating 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.
Safe operating context
Keep safety, plant awareness, and system reasoning visible throughout practice.
Ready for expansion
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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
Boilers
Plant Systems
Controls
Water Treatment
Maintenance
Calculations
Operating Logic
Your trade exam deserves a game plan.
Start with 30 free questions. Find the gaps. Build your exam confidence.