Science and nature Past Exam Questions for Class 3 Refrigeration Machine Supervisor 2020

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Science and nature
Complete collection of all problems and explanations of answers from fiscal 2012 to fiscal 2019! This book contains eight years' worth of past problems and their answers and explanations regarding the "Class 3 Refrigeration Machine Supervisor Examination (Production Safety Manager Examination for Class 3 Refrigeration Machine Supervisor Certificate)" conducted by the High Pressure Gas Safety Association. Past problems are recorded for each fiscal year, and problems, explanations, and answers are given for each question. Each description of problems, whether correct or wrong, is explained in detail, and you can learn while acquiring peripheral knowledge. This book is recommended for those who want to master each question steadily.