This is a collection of exam questions for the High-Pressure Gas Manufacturing Safety Manager, Class A Chemical and Mechanical certifications. It includes 5 years' worth of questions for both national and certification exams. As many of you may know, this qualification exam frequently features questions from more than 5 years ago, so studying about 10 years' worth of material is recommended. I believe older past question collections are valuable. I passed the national exam for Class A Mechanical certification. I have also noted in pencil on which page of the "High-Pressure Gas Safety Technology" textbook, which I am selling separately, the explanations can be found. I believe this will be helpful, so I am selling this book as is. The following is an AI-generated composition. ------- This is a problem collection for Class A Chemical and Mechanical, perfect for qualification exam preparation. - Title: Class A Chemical and Mechanical Lecture Problem Collection - Author: High Pressure Gas Safety Association - Language: Japanese - Publication Year: Reiwa 2 (2020) Thank you for looking.