A collection of model answers for the 2nd class electrical engineer exam, containing all problems and explanations from the past 5 years. - Title: Model Answer Collection for 2nd Class Electrical Engineer Exam - Author: Denken Mondai Kenkyukai (Electrical Engineer Problem Research Group) - Editions: 6 books from the Heisei 16 (2004) edition to the 2023 edition - Contents: Includes all problems from the past 5 years, along with standard answers and explanations. Thank you for viewing. The Heisei 16 (2004) edition has stains on the edge of the pages. The Heisei 21 (2009) and 29 (2017) editions have pencil markings on the edges indicating the year. There are no visible writings or stains in the main text of the problems and explanations.