Here are past exam questions and explanations for the Class 2 Refrigerating Machine Technician certification exam (Knowledge & 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 purchased from the High-Pressure Gas Safety Institute, Mercari, etc. *There are occasional places where the text is difficult to read.* * *Faded characters* * *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.