1
Electrical Theory
DC circuits and network theorems | AC circuits, phasors, and resonance | Three-phase systems and electromagnetic theory
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Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law) Free Practice Test
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A 12 V ideal source feeds a 2 Ω resistor in series with a parallel combination of 6 Ω and 3 Ω. What current flows through the 6 Ω resistor?
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Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law)
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Exam Syllabus
Core Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law) topics
2
Power Systems
Transmission and distribution line calculations | Fault analysis and protective coordination | Power factor correction and voltage regulation
3
Electrical Machinery and Applications
Transformer principles and equivalent circuits | Induction motor characteristics and starting methods | Synchronous machines and DC machine fundamentals
4
Law Safety and System Management
Electrical facility classifications and chief engineer duties | Grounding, insulation, and protective safety measures | Measurement instruments and maintenance management
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Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law)
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Core knowledge88%
Applied practice76%
Ethics & safety64%
Video course preview
Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law) video course
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Learner reviews
What learners say about the Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law) practice tools
Feedback from learners using Denken Exam to make Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law) preparation more focused and manageable.
4.9/5
from 400+ reviews
Victor S.
Denken Exam learner
“While preparing for THEORY-POWER-MACHINE-LAW, I keep a small list of mistakes from Power Systems. Reviewing why each answer went wrong keeps my study sessions more focused than simply rereading notes.”
Amara K.
Denken Exam learner
“Great THEORY-POWER-MACHINE-LAW prep. Denken Exam was clear and easy to use!”
Leo F.
Denken Exam learner
“For THEORY-POWER-MACHINE-LAW, Electrical Machinery and Applications was the area I kept postponing. Breaking it into a few practice questions at a time makes the material much easier to revisit after work.”
Nadia F.
Denken Exam learner
“My THEORY-POWER-MACHINE-LAW routine is simple: one timed set, a short break, then a careful review of Law Safety and System Management. The explanations show whether I understood the idea or just guessed well.”
Jonas P.
Denken Exam learner
“The THEORY-POWER-MACHINE-LAW practice questions kept my review focused.”
Rosa M.
Denken Exam learner
“I use lunch breaks to review Electrical Theory for THEORY-POWER-MACHINE-LAW. Short sessions work better for me because I can focus on one weak area without trying to cover the whole syllabus at once.”
Jamal W.
Denken Exam learner
“The hardest part of THEORY-POWER-MACHINE-LAW prep for me is keeping similar ideas in Power Systems separate. I now write one-line comparisons after each practice set, which makes the next review much clearer.”
Yuki S.
Denken Exam learner
“Denken Exam made THEORY-POWER-MACHINE-LAW prep simple and easy to follow.”
Trevor B.
Denken Exam learner
“I am still working through THEORY-POWER-MACHINE-LAW, especially Electrical Machinery and Applications. Going back through missed questions slowly has shown me which details I rush past when I practice under time pressure.”
Hannah T.
Denken Exam learner
“THEORY-POWER-MACHINE-LAW review felt much more manageable with these tools.”
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“The practice questions, key study notes, and supportive staff all help me pass the exam. The best thing is the questions are well structured and similar to the ones on the exam.”
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“the practice questions are helpful similar to the topics covered in the real exams i love the detailed explanation provided right after each question”
“The well-structured practice questions really help me prepare for the exams conveniently.”
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FAQ
Common questions about Third-Class Electric Chief Engineer 電験三種 (Theory/Power/Machine/Law)
Is this a full mock examination?
No. The 20 questions check supporting knowledge across four domains and are not a simulation of the official paper. The integrated task in the guide provides representative open practice, but neither component covers the full syllabus.
Can I ignore Law because it has fewer answers?
No. The supplied policy indicates 13 Law answers, but each subject must be passed. Fewer questions can mean less margin for error, so practise safety reasoning, scope, earthing, insulation, and records alongside calculations.
Should I memorize formulas or derive them?
Memorize a compact set—Ohm/Kirchhoff, impedance, three-phase power, per-unit, speed/slip, transformer ratio, and DC EMF—but practise deriving relationships and checking units. Derived understanding prevents sign and line/phase mistakes.
How should I study legal and safety material?
Learn the purpose of each safeguard and verify current wording from official sources. Treat exact classifications, notification duties, and inspection intervals as subject review rather than relying on old notes or isolated slogans. This guide is educational, not legal advice.
Why does this guide treat administrative rules as subject review?
The subject-exemption and overall pass routes involve separate conditions, and application dates, fees, venue availability, and current legal text can change. Confirm them with current official information rather than inferring them from a study guide or older notes.
What am I paying for, and why choose Premium over free resources?
When you’re preparing for an exam, the cost goes beyond study materials. It’s the evenings spent searching for answers, the uncertainty about whether you’re covering the right topics, and the possibility of paying for another exam attempt. Premium gives you a focused way to prepare. Practice questions and explanations help you check your understanding. Wrong-answer review and progress tracking show where to focus next. Flashcards, spaced repetition and timed mocks help you revisit difficult material and practise answering under pressure. The goal is to make your limited study time count—and build confidence from what you can actually answer, rather than how many hours you’ve spent reading. Better preparation can help reduce the risk of a costly retake and the extra time away from work, family or other goals. Think of Premium as an investment in your preparation and professional development: one organised system to help you use your time more effectively and approach exam day with greater confidence. Choose the certification and access period you need, with a one-time payment and no recurring subscription.
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