Class 3 Refrigeration Exam

A Japanese-language study app for Japan's Class 3 Refrigeration Machine Chief Engineer exam (第三種冷凍機械責任者). Please note: the interface, the questions and every explanation are in Japanese. Japanese reading ability is required. ■ What it is 112 original questions written to the published exam subjects and question counts. The 60 questions based on law were machine-checked against the current articles in e-Gov, the Japanese government's official legislation database. ■ The law is re-checked against the source every week The articles behind the legal questions are matched by machine against the current text in e-Gov every week. A question whose article changed in an amendment is flagged, reviewed, and fixed without an app update. ■ Pass or fail is decided by your weakest subject The exam requires at least 60% in each of its two subjects, laws and safety management technology, so one subject under 60% fails you. The app scores you by subject against the same threshold and names the subject you are short on. ■ An explanation for all five choices Every one of the five choices carries its own explanation, not just the correct one, so you learn why a choice is wrong rather than memorise the answer. ■ The statute behind the 60 legal questions The 60 questions based on law show the underlying article from e-Gov, so you can verify the explanation against the law itself. Safety management technology questions show a summary of their source. ■ Mock exams in the real format Two subjects: laws and safety management technology (the real exam has 20 law questions and 15 technology questions). A half mock of 17 questions and a full mock of 35 questions matching the real exam structure, with a subject-by-subject breakdown. ■ About the qualification The Class 3 Refrigeration Machine Chief Engineer is a national licence (production safety manager licence) under Japan's High Pressure Gas Safety Act; the exam is run by the High Pressure Gas Safety Institute of Japan (KHK). Holders can be appointed refrigeration safety manager at facilities with a daily refrigeration capacity under 100 tons. There are no eligibility requirements. Exam dates and procedures can change; confirm them on the examining body's official site. ■ Offline and private Android 8.0 or later. Questions are bundled in the app, so you can study offline. The app goes online only for question corrections and purchases. There is no account to create, and your study record stays on the device. ■ What is free 10 drill questions in total, one half mock exam (17 questions), and 3 days of the auto-play review mode. The allowance does not reset daily. A single in-app purchase unlocks the rest. It is not a subscription, and there are no ads. See the In-app purchases line on this page. ■ Sources and relationship to government bodies ・High Pressure Gas Safety Institute of Japan (KHK, examining body) https://www.khk.or.jp/ ・e-Gov law search, High Pressure Gas Safety Act https://laws.e-gov.go.jp/law/326AC0000000204 ・e-Gov law search, Enforcement Order of the Act https://laws.e-gov.go.jp/law/409CO0000000020 ・e-Gov law search, Refrigeration Safety Regulations https://laws.e-gov.go.jp/law/341M50000400051 ・Ministry of Economy, Trade and Industry https://www.meti.go.jp/ This is an unofficial study app made by Particles and Waves. It is not affiliated with, endorsed by, or representative of the High Pressure Gas Safety Institute of Japan, the Ministry of Economy, Trade and Industry, or any other government or examining body, and it does not guarantee a pass. Questions are original work based on the Act, its order, the Refrigeration Safety Regulations and the published exam format. They are not reproductions of past exam papers. English text prepared 2026-09-24 from the Japanese listing, verified against the shipping app.