Hazmat Type 4 Exam Prep JP

A study app for the Japan Dangerous Goods / Hazardous Materials Handler exam, Class B Type 4 (危険物取扱者 乙種第4類, "Otsu-4"), the qualification for handling flammable liquids such as gasoline and kerosene. Study efficiently with practice questions and clear explanations across all subjects.

■ Subjects Covered
[Laws and Regulations]
• Definition and categories of hazardous materials (Types 1-6) and designated quantities
• Standards for manufacturing, storage, and handling facilities (location, structure, equipment)
• Permits, notifications, and inspection procedures
• Roles and duties of handlers and safety supervisors
• Standards for storage, handling, transport, and conveyance
• Signs, notice boards, fire-extinguishing and alarm equipment
• Administrative dispositions (orders, permit revocation)

[Physics and Chemistry]
• States of matter, phase changes, specific gravity, vapor
• Heat and temperature, thermal expansion
• Generation and prevention of static electricity
• Acids and bases, oxidation and reduction
• The three elements of combustion, flammable (explosive) range
• Flash point, ignition point, types of combustion
• Theory of fire extinguishing (removal, smothering, cooling, inhibition)

[Properties, Fire Prevention and Extinguishing]
• Common properties of Type 4 substances and how to prevent and fight fires
• Special flammable materials (diethyl ether, carbon disulfide, etc.)
• Petroleum class 1 (gasoline, benzene, toluene, etc.)
• Alcohols
• Petroleum class 2 (kerosene, diesel, etc.)
• Petroleum class 3 (heavy oil, creosote oil, etc.)
• Petroleum class 4 and animal/vegetable oils

■ 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.

※ This app is an independent study tool and is not affiliated with any examination body (the Fire and Disaster Management Examination Center or the prefectural governments). Content is based on the general scope of the exam and may differ from the actual exam due to legal changes or syllabus updates.