Here are past exam questions and explanations for the Class 2 Refrigerating Machine Technician training course (knowledge and safety management). This includes a total of 9 sets of questions, from the 1st session of Reiwa 6 to the 1st session of Reiwa 2. These are past exam questions for the Class 2 Refrigeration Technician exam, purchased from the High-Pressure Gas Safety Institute, Mercari, etc. *There are occasional places where the text is difficult to read.* * Faded text * For areas that are difficult to see, I looked at the explanations in the answers to understand the characters. Please note that materials from the 1st session of Reiwa 4 onwards have a "Reproduction Prohibited" mark printed on them.