Hazmat Class B4 Exam Prep JP

A study app for the Japan Hazardous Materials Handler (Class B-4 / Otsu-4) exam. Study efficiently with practice questions and detailed explanations across all 3 subjects. ■ Subjects Covered • Laws and regulations on hazardous materials • Basic physics and basic chemistry • Properties of hazardous materials, fire prevention, and extinguishing methods ■ Study Modes • Random practice (10 / 25 / 50 / 100 questions) • Study by subject • All questions in order (resume supported) • Review incorrect answers • Bookmarks and unanswered questions ■ Progress Tracking • Automatic tracking of correct answer rate • Subject-by-subject performance overview Works completely offline — study anytime, anywhere. ■ Reference Sources • Fire and Disaster Management Agency https://www.fdma.go.jp/ • Center for Fire and Disaster Prevention, Testing Division https://www.shoubo-shiken.or.jp/ ※ This app is an independent study tool and is not affiliated with any examination body.