第三種冷凍機械責任者 試験対策・問題集

This app is a multiple-choice question practice tool designed to help you pass the Third-Class Refrigeration Machine Operator (High-Pressure Gas Manufacturing Safety Manager Examination).

It covers two subjects: safety management technology (refrigeration cycle, compressor, condenser, evaporator, safety devices, and operation management) and laws and regulations (High-Pressure Gas Safety Act and Refrigeration Safety Regulations). The app provides 586 questions organized into 13 fields for repeated practice.

■ Contents
Total 586 questions / 13 fields

① Principles of Refrigeration and Refrigeration Cycles (42 questions)
② Heat Transfer, Refrigerants, Brine, and Refrigerating Oil (44 questions)
③ Compressors (38 questions)
④ Condensers and Evaporators (43 questions)
⑤ Automatic Control Equipment and Ancillary Equipment (43 questions)
⑥ Refrigerant Piping and Safety Devices (42 questions)
⑦ Material Strength and Pressure Vessels, Pressure Testing and Commissioning (55 questions)
⑧ Operation and Maintenance of Refrigeration Equipment (45 questions)
⑨ High-Pressure Gas Safety Act, Manufacturing Permits, and Calculation of Refrigeration Capacity (44 questions)
⑩ Storage, Transfer, and Filled Containers (51 questions)
⑪ Sales, Equipment Manufacturing, Safety Education, and Refrigeration Safety Manager (49 questions)
⑫ Change Procedures, Completion Inspection, Safety Inspection, Periodic Self-Inspection, and Hazard Prevention Regulations (46 questions)
⑬ Technical Standards and Certified Equipment (44 questions)

The safety management technology section covers areas ①-⑧, and the legal regulations section covers areas ⑨-⑬.

The legal regulations section is aligned with the standards for the 2026 exam (the articles as of April 1st of that year), and questions regarding safety inspection cycles, etc., are presented using the current wording of the articles.

All questions include explanations. You can check the numerical values, legal requirements, and equipment roles, including why they are the way they are, for each question.

■ Practice Exam Mode

You can choose the length of the practice exam depending on whether you have time or not.


* **Official Exam Mode:** 35 questions/150 minutes (20 questions on laws and regulations + 15 questions on safety management technology - same number of questions and time as the actual exam)
* **Short Mode:** 20 questions/15 minutes (Get a feel for the overall flow in short bursts of time)
* **Full Mode:** All questions/unlimited time (a final review)
* **Custom Mode:** Freely set the number of questions and time limit.

After scoring, the correct answer rate for each subject area is displayed, so you can see immediately where you lost points.

Just like the actual exam, it determines whether you reached 60% in both laws and regulations and safety management technology.

■ Review Only Incorrectly Answered Questions

Questions you answered incorrectly even once are automatically added to the review list.

It also supports weighted review, where questions you answered incorrectly more often are presented more frequently.

■ Review Schedule

Based on the forgetting curve, it automatically generates "questions to do today."

You only need to solve questions with deadlines, so you won't be confused about where to start.


■ Bookmarks
You can bookmark questions you answered correctly but weren't confident about.
You can review only the bookmarked questions right before the exam.

■ Proficiency Map
A radar chart displays the correct answer rate for each of the 13 subject areas.
You can see the overall correct answer rate, number of questions answered, and number of questions that need review at a glance,
and numerically identify which areas you're weak in.

■ Full-Text Search
You can search across all 586 questions, answer choices, and explanations.
You can easily check questions containing terms you're curious about, such as "expansion valve," "refrigeration safety officer," and "R410A."

■ Quick Reference Chart/Glossary
You can easily check terms you want to remember.

■ Daily Study Record
A ring displays your progress towards your daily target number of questions and records your consecutive study days.
The number increases the longer you study, helping you develop a study habit.

■ No Ads/No Account Registration
No ads are displayed. No membership registration or email address input is required. Learning records are saved only on your device.

■ Pricing
The app is free to download.
You can try the first 10 questions from each of the 13 subject areas, for a total of 130 questions.
To access all 586 questions, as well as the mock exam, review schedule, full-text search, and quick reference guide,
an in-app purchase (one-time purchase) is required. There are no monthly fees or additional charges.

When changing devices or reinstalling, you can transfer your purchases from "Restore Purchases" within the app.

■ About the Examination (as of September 2026)
Administered by: High Pressure Gas Safety Association (KHK) / Governor's Examination
Format: Multiple Choice (Mark Sheet)
Subjects: Laws and Regulations (20 questions, 60 minutes) / Safety Management Technology (15 questions, 90 minutes)
Passing Criteria: Approximately 60% of the perfect score for each subject
Examination Date: November 8, 2026 (Sunday)
Examination Fee: Internet Application: 9,800 yen / Paper Application: 10,300 yen
Eligibility Requirements: No restrictions based on age, education, or experience
* If you complete the KHK training course and pass the examination, the Safety Management Technology section will be waived.

Please be sure to check the latest information on the official website of the High Pressure Gas Safety Association.

■ Caution
This app is an unofficial learning app.
It is not affiliated with the High Pressure Gas Safety Association.
The names listed are trademarks or registered trademarks of their respective rights holders.
The questions included are independently created based on the scope of the examination and are not actual examination questions.