Class 3 Refrigeration Exam JP
Class 3 Refrigeration Exam JP Summary
Class 3 Refrigeration Exam JP is a free, ad-supported Android app in Business by razuma. Released in Jun 2026 (3 months ago). It has about 90+ installs Based on AppGoblin estimates, it reaches roughly 32 monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store last updated Jul 14, 2026
Recent activity: 11 installs this week (39 over 4 weeks) showing steady growth View trends →
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App Description
Study for Japan Class 3 Refrigeration Engineer exam with Q&A, offline
A study app for the Japan Class 3 Refrigeration Machinery Responsible Engineer (第三種冷凍機械責任者) exam. Study efficiently with practice questions and detailed explanations across all subjects.
■ Subjects Covered
• Refrigeration Principles and Refrigerants
• Refrigeration Equipment (Compressor / Condenser / Evaporator / Expansion Valve)
• Auxiliary Devices, Automatic Control and Safety
• Operation, Maintenance and Inspection
• Laws and Regulations (High Pressure Gas Safety Act)
■ 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 Source
• https://www.khk.or.jp/ (High Pressure Gas Safety Institute of Japan)
※ This app is an independent study tool and is not affiliated with any examination body. Content is based on general exam scope and may differ from the actual exam due to law revisions.