電験三種 法規 過去問 2026 一問一答

Complete explanations for all questions, including 10 years' worth of past exam questions.

This app allows you to study past exam questions for the Third-Class Electrical Chief Engineer (Denken) exam's legal regulations section in a question-and-answer format. It includes the last 10 years of actual exam questions and covers the entire scope of the Electricity Business Act, Electrical Construction Workers Act, Electrical Construction Business Act, Electrical Equipment Technical Standards, and Electrical Facility Management (including calculation problems in Section B).


■ Main Features
- Includes over 200 questions from the past 10 years (all questions with explanations)
- Efficient learning in spare time with a question-and-answer format
- AI answers your questions instantly
- Automatically detects and prioritizes your weak areas
- Displays your correct answer rate based on all users' answer data
- Selectable practice range by year (first half/second half)

■ Covers frequently tested topics in legal subjects
You can focus on topics that appear every year, such as the chief engineer system and safety regulations of the Electricity Business Act, the scope of work for electricians, insulation, grounding, and voltage classifications in the Electrical Equipment Technical Standards and Interpretations, demand factor, load factor, inequality factor, power factor correction capacitors, and overcurrent relay settings.

■ AI Question Function
You can ask the AI ​​about the meaning of articles and calculation procedures that you don't understand even after reading the explanations. You will receive answers tailored to your level, such as "How to remember insulation resistance values" and "The difference between demand factor and load factor."

■ A system that makes it easy to continue learning
- Make learning a habit with "Today's Question" delivered daily
- Work together with friends in the league-style ranking system
- Check your learning progress with graphs