Denken 3rd Class - PassRun

Everything you need for the Japanese Class-3 Chief Electrical Engineer exam (電験三種), in one app.

522 original practice questions written along the official syllabus, every one with an explanation.
No sign-up, no internet connection required — start studying the moment you install it.

■ Mock exams in the real format
- 76 items across all four subjects (Theory 20, Power 20, Machines 20, Law 16)
- Pass/fail judged per subject: 60 out of 100 in each, just like the real exam
- Jump to any question from the answer-sheet view, just like the real CBT
- Pause and resume where you left off
- 5 full rounds with no repeats

■ Per-subject results, the way the exam actually works
- Denken 3rd Class is passed subject by subject, and a passed subject is exempt for two years
- The result screen shows whether each subject cleared 60 points, so you know what is left
- A high total does not hide a subject below 60 — the app says that subject failed

■ A mistake notebook that thins itself out
- Wrong answers are collected automatically
- Three correct answers in a row graduates a question off the list
- Add your own note to any question
- Filter by subject, sort by how often you missed it

■ Study by the 4 subjects and 32 sub-topics
- Theory (electrostatics, DC circuits, magnetism, AC circuits, transients, electronics, measurement)
- Power (hydro, thermal and nuclear generation, renewables, substations, transmission, distribution, materials)
- Machines (DC, induction and synchronous machines, transformers, power electronics, drives, lighting, heating, control, information)
- Law (Electricity Business Act, technical standards, their interpretation, facility management)
- Short, focused sets by sub-topic, with the answer and explanation right after each tap

■ Statistics that show your weak spots
- Accuracy per subject, so weak areas surface on their own
- Score trend across your mock exams
- Last two weeks of study time and your daily streak
- "Weak-point drill" that gathers only your lowest-accuracy questions

■ And more
- Random mock: choose the range and the number of questions
- Bookmarks for the ones you want to come back to
- Search across question text, options and explanations
- Dark mode and adjustable text size
- Shuffle questions and options so you don't memorise positions

- Your study records stay on the device and are never sent anywhere.
- The questions are original practice questions written along the syllabus, not the actual exam papers.
For official information such as schedules and applications, see the exam centre site (shiken.or.jp).
- Contact: [email protected]