This is a study guide for the certification exam, containing explanations of problems related to refrigeration systems. - Title: Explanation of Exam Questions for Class 2 Refrigeration Machine Training by the High-Pressure Gas Safety Institute - Exam Time: 120 minutes - Publication Year: 2nd Edition of Reiwa 5 (Implemented February 25, Reiwa 6) - Content: Problem explanations related to refrigeration systems Thank you for viewing.