# 電験二種 過去問アプリ > Practice past questions from the Class 2 Electrical Engineer Examination with explanations in a question-and-answer format. Improve your skills in your spare time. Canonical page: [https://chrome-stats.com/d/guchi.lab.denken2](https://chrome-stats.com/d/guchi.lab.denken2) ## Overview - **ID:** `guchi.lab.denken2` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** GUCHI.LAB - **Category:** EDUCATION - **Downloads:** 508 - **Last updated:** 2026-08-11 - **First published:** 2026-08-05 - **Publisher country:** JP - **Data as of:** 2026-09-12 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=guchi.lab.denken2) - **Privacy policy:** [https://sites.google.com/view/denken-2-denryoku](https://sites.google.com/view/denken-2-denryoku) ## Description To pass the Class 2 Electrical Chief Engineer Examination (First Stage), it's crucial not only to repeatedly solve past questions but also to understand "why" the answer is correct.

This app allows you to study past questions from the Class 2 Electrical Chief Engineer Examination (First Stage) in a question-and-answer format.

Developed by a developer who passed the Class 1 Electrical Chief Engineer Examination, the explanations for each question are based on specialized knowledge.

Solve the problem, check your answer, and read the explanation.
It's designed so you can practice past questions daily using just your smartphone.

▼ Features of this app
● Developed by a developer who passed the Class 1 Electrical Chief Engineer Examination
The developer himself passed the Class 1 Electrical Chief Engineer Examination (First Stage).
The explanations for each question are also based on specialized knowledge.

● Learn immediately without login
No account registration is required.
You can start practicing free questions immediately after launching the app.
You can study even in short periods of time, such as during your commute, breaks, or before going to bed.

● Efficient Review with "Today's Lesson"
Prioritizes questions that you haven't studied yet or questions that are due for review.
Instead of blindly repeating all questions, you can work on the questions you need according to your learning progress.

● Thorough Explanations to Confirm the Reasoning Behind the Answer
After answering, you can check not only whether your answer is correct or incorrect, but also the thought process and related knowledge that led to the answer, so you can understand "why that is the correct answer."
This can be used for understanding for those learning for the first time, as well as for checking knowledge during review.

● Select Questions by Subject, Year, and Field
You can choose the subject you want to study from Power, Machinery, and Regulations.
You can solve questions from a specific year, or focus on areas you struggle with.

● Save Important Questions with Bookmarks
You can bookmark questions that interest you or questions you want to review repeatedly.
This is convenient for reviewing weak areas or for last-minute review before an exam.

● Check Your Skills with Scoring Mode
You can answer questions by year and check your score, pass/fail judgment, and answer results after completion.

Your answers are saved on your device, allowing you to resume from where you left off.
You can also review your past scoring results later.

● Check your learning records by subject
You can check the number of questions, correct answer rate, study time, and consecutive study days.
You can also review your daily progress and breakdown by subject area from the learning history calendar.

● Learn with a display that suits you
You can change the font size of questions and explanations, and it supports light mode and dark mode.
Answering questions, viewing explanations, and saving learning records can be done offline.

▼ Contents Included
・Power: From FY2025 to FY2007
・Machinery: From FY2025 to FY2007
・Regulations: From FY2025 to FY2007
・The latest year's questions are available for free.
・Some years are offered as one-time purchase add-on content.
・Not a monthly subscription.
・More subjects and years will be added in the future.

▼ Recommended for:
・Those aiming to pass the Class 2 Electrical Engineer Examination (First Stage)
・Those who want to balance work/school with exam preparation
・Those who want to practice past questions on their smartphone
・Those who want to deepen their understanding by reading explanations
・Those who want to efficiently tackle unstudied and review questions
・Those who want to utilize commuting time and break time for studying
・Those who want to check their current ability with yearly practice questions

▼ Turn daily practice into a driving force for success
To pass the Class 2 Electrical Engineer Examination, it's essential not only to memorize once, but also to repeatedly solve problems and solidify your understanding.

This app was created by a developer who passed the Class 1 Electrical Engineer Examination, designed to make it easier to continue practicing and reviewing past exam questions, and to deepen your understanding of the problems through explanations.

Let's transform small daily efforts into solid strength towards passing the exam. ## Rankings - #1,383,146 — Overall ## Similar extensions and apps - [電験三種 電力 過去問 2026 一問一答｜パスマル](https://chrome-stats.com/d/com.minatoapps.denken3d) — 318 users - [電気工事士2種 試験対策 過去問・筆記](https://chrome-stats.com/d/com.kohei.denkistudy) — 36 users - [電気工事士２種 過去問（解説投稿型）](https://chrome-stats.com/d/com.harusankaigo.kakomon.DenkiGrade2) — 1,161 users - [電験三種 電力ラボ](https://chrome-stats.com/d/com.denken3.denryokulab) — 112 users - [電気工事士２種 過去問（完全版）](https://chrome-stats.com/d/com.harusankaigo.kakomon.DenkiGrade2Pro) — 204 users - [電気工事士 第2種 2026 全問解説](https://chrome-stats.com/d/jp.co.trips.shikakudenkikoji2) — 58,254 users - [電験三種 理論ラボ](https://chrome-stats.com/d/com.denken3.denken3_theory) — 822 users - [電気工事士2種：ゼロから学べる第二種電気工事士の基礎＋過去問](https://chrome-stats.com/d/com.zerokara_denkou_2) — 35,403 users - [2級電気工事施工管理技士学科過去問題/令和7年前期1次～](https://chrome-stats.com/d/com.r3den2sekokan) — 162 users - [電験三種 2022年度版 試験対策の過去問題集アプリ](https://chrome-stats.com/d/apps.dream.fantastic.dai3denki) — 1,439 users - [第二種電気工事士 チャレンジ](https://chrome-stats.com/d/com.ikorihs.elecitems) — 1,180 users - [技術士 電気電子部門 過去問集 | 専門科目の対策アプリ](https://chrome-stats.com/d/jp.ktg.engineerelectric) — 16 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/guchi.lab.denken2)