PART 1 (Key Points)
Chap.1 Symbols and Basic Electrical Mathematics 9
Chap.2 Electromagnetism 15
Chap.3 Power Engineering 49
Chap.4 Electrical Equipment 75
Chapter 5 Circuit Theory 105
Chapter 6 Control Engineering 126
Chapter 7 Electrical Installation Technical Standards 139

PART 2 (2025-2017)
25th Electrical Engineer Exam (CBT Restoration Problem) 164
25th Electrical Engineer Exam (CBT Restoration Problem) 186
25th Electrical Engineer Exam (CBT Restoration Problem) 208

24th Electrical Engineer Exam (CBT Restoration Problem) 232
24th Electrical Engineer Exam (CBT Restoration Problem) 254
24th Electrical Engineer Exam (CBT Restoration Problem) 274

23rd 1st Electrical Engineer Exam (CBT Restoration Problem) 296
23rd Electrical Engineer Exam (CBT Restoration Problem) 319
23rd Electrical Engineer Exam (CBT Restoration Problem) 341

22nd year, 1st Electrical Engineer Examination 364
22nd Electrical Engineer Examination, 388
22nd 3rd Electrical Engineer Exam (CBT Restoration Problem) 413

21st Electrical Engineer Exam 436
21st Electrical Engineer Exam 459
21st 3rd Electrical Engineer Examination 482

2020 1st and 2nd Electrical Engineer Examination 506
2020 3rd Electrical Engineer Exam 528
2020 4th Electrical Engineer Exam 550

19th Electrical Engineer Exam 574
19th Electrical Engineer Exam 2nd Class 595
19th 3rd Electrical Engineer Examination 616

18th Electrical Engineer Exam 638
2nd Electrical Engineer Exam 660 in 2018
18th 3rd Electrical Engineer Exam 681

17th Electrical Engineer Exam 704
2nd Electrical Engineer Exam 725 in 2017
17th 3rd Electrical Engineer Exam 747


PART 3 (2016∼2003)
16th Electrical Engineer Exam 772
16th Electrical Engineer Exam 2nd Class 786
16th Electrical Engineer Exam 801

15th year, 1st Electrical Engineer Examination 816
15th year, 2nd Electrical Engineer Examination, 828
15th 3rd Electrical Engineer Examination 844

14th year, 1st Electrical Engineer Examination 860
2nd Electrical Engineer Examination, 2014, No. 874
14th 3rd Electrical Engineer Exam 888

13th year, 1st Electrical Engineer Examination 902
2nd Electrical Engineer Exam 912 in 2013
13th year, 3rd Electrical Engineer Examination, 923

12th year, 1st Electrical Engineer Examination 938
2nd Electrical Engineer Examination, 2012, No. 949
12th year, 3rd Electrical Engineer Examination 959

11th year, 1st Electrical Engineer Examination 972
2nd Electrical Engineer Examination, 2011, No. 983
11th year, 3rd Electrical Engineer Examination 993

10th Annual Electrical Engineer Exam 1002
1010, 2nd Electrical Engineer Exam
1020, 3rd Electrical Engineer Examination in 2010

09 1st Electrical Engineer Exam 1032
2009 2nd Electrical Engineer Exam 1043
09 3rd Electrical Engineer Exam 1052

08 1st Electrical Engineer Exam 1064
2008 2nd Electrical Engineer Exam 1073
08 3rd Electrical Engineer Exam 1082

07 1st Electrical Engineer Exam 1092
2nd Electrical Engineer Exam 1100 in 2007
07 3rd Electrical Engineer Exam 1105

06 1st Electrical Engineer Exam 1114
2006 2nd Electrical Engineer Exam 1121
2006 3rd Electrical Engineer Exam 1127

05 1st Electrical Engineer Exam 1136
2005 2nd Electrical Engineer Exam 1143
05 3rd Electrical Engineer Exam 1151

04 1st Electrical Engineer Exam 1158
2004 2nd Electrical Engineer Exam 1164
04 3rd Electrical Engineer Exam 1171

03 1st Electrical Engineer Exam 1180
2nd Electrical Engineer Exam 2003, 1187
2003 3rd Electrical Engineer Exam 1194

preface

In order to easily obtain a license in the shortest possible time in the electrical field, which plays a pivotal role in the national basic industry, it is most important to first thoroughly analyze the questions on the previous exam, analyze the scope and difficulty of the exam, and prepare accordingly.

Accordingly, this book is divided into Part 1, Part 2, and Part 3 to provide test takers preparing to obtain a certificate with the opportunity to encounter a variety of problems in a short period of time, while also providing them with an understanding of recent exam trends. This book focuses on the following points:

Part 1: This book summarizes and summarizes the basic electrical and electronic mathematics, key formulas, and key contents for each subject that test takers must understand or memorize.
Part 2: Original texts and CBT restored questions from 2025 to 2017 are arranged in chronological order to facilitate understanding of recent exam trends.
Part 3: Among the exam questions from 2016 to 2003, we have deleted the same or similar questions from 2017 onwards, indicating the exam year, round and question number, to reduce the amount of study time for test takers while providing them with the opportunity to encounter a variety of question types.

First: We have prepared this book to ensure that test takers can fully and accurately understand the questions by including verified answers and detailed explanations.
Second: We have revised and supplemented the previously presented questions to comply with the revised KEC regulations.

Finally, I would like to express my deepest gratitude to those of you who are preparing for the written exam using this study guide. If you discover any typos or incorrect answers that may have occurred during the publishing process, please contact us so that we can correct them and strive to make this a better study guide.
Additionally, any errors in this application will be posted in the Customer Center/Errata Report section of the website, so please refer to it carefully.

Internet address: www.ent1.co.kr
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