For the convenience of students studying and carrying, it has been divided into two volumes.
Volume 1 consists of the text and practice problems for each subject, and Volume 2 consists of CBT past exam questions and explanations for past exam questions from previous years.

PART 01.
Introduction to Water Pollution
Chapter 1 Basic Concepts
Chapter 2 Types of Water Resources and Physical and Chemical Properties of Water
Chapter 3 Water Pollution and Pollutant Discharge Sources
Chapter 4 Water Chemistry
Chapter 5 Aquatic Biology
Chapter 6 Water Resources Management
Chapter 7 Reaction Systems and Water Quality Management Models

PART 02.
Water and sewerage plan
Chapter 1 Basic Waterworks and Sewerage Plan
Chapter 2 Water sources, water collection, and storage facilities
Chapter 3 Water supply and transmission facilities
Chapter 4 Water Purification Facilities
Chapter 5 Drainage and Water Supply Facilities
Chapter 6 Sewerage Facilities
Chapter 7 Pumps and Pumping Stations

PART 03.
Water pollution prevention technology
Chapter 1 Design of wastewater treatment facilities
Chapter 2 Physical Processing
Chapter 3 Chemical Treatment
Chapter 4. Treatment of Hazardous Substances
Chapter 5 Biological Treatment
Chapter 6 Sludge Treatment
Chapter 7 Advanced Processing

PART 04.
Water quality pollution process testing standards
Chapter 1 General Provisions/Quality Assurance/Quality Control
Chapter 2 Sample collection and preservation methods
Chapter 3 Flow Measurement Method
Chapter 4 Sample Pretreatment Methods
Chapter 5 Instrumental Analysis Methods
Chapter 6 Sediment Measurement Methods
Chapter 7-1 Item-by-item testing methods
Chapter 7-2 Item-by-item test methods (DO, BOD, COD, TOC)
Chapter 7-3: Test methods by item (E. coli, Daphnia ecotoxicity, phytoplankton)

PART 06.
Practical CBT past exam questions and previous year's exam answers

Article CBT Past Questions 1 (3rd Exam in 2022)
Article CBT Past Questions 2 (Major Past Questions from 2019)
Article CBT Past Questions 3 (Major Past Questions from 2019)
Article CBT Past Questions 4 (1st Exam in 2023)
5th CBT exam questions (2nd exam in 2023)
Article CBT Past Questions 6 (3rd Exam in 2023)
7th CBT exam questions (1st exam in 2024)
Article CBT Past Questions 8 (2nd Exam in 2024)
9th CBT exam questions (3rd exam in 2024)
10 Past Questions from the CBT (1st Exam in 2025)
Article CBT Past Questions 11th (2nd Exam in 2025)
12th CBT exam questions (3rd exam in 2025)
2022 1st and 2nd Water Quality Economist
2021 1st, 2nd, and 3rd Water Quality Economist
2020 1st and 2nd integrated, 3rd and 4th water quality environment engineer

1st Industrial Engineer CBT Mock Exam
Industrial Engineer CBT Mock Exam 2 times
3rd Industrial Engineer CBT Mock Exam
4th Industrial Engineer CBT Mock Exam
5 Industrial Engineer CBT Mock Exams
6th Industrial Engineer CBT Mock Exam
2020 3rd Water Quality and Environment Industry Engineer Exam
2020 1st and 2nd Integrated, 3rd Water Quality and Environment Industry Engineer Exam

This book was first published in 2013 and is widely known as the most beloved textbook for environmental engineering exam takers nationwide.

Based on my experience of teaching water quality environment certification in the field for over 20 years, I provide students taking the water quality environment (industrial) engineer exam with a condensed written exam preparation course, and I also considered the smooth connection to practical exam preparation.

For non-majors and beginners, the book provides detailed explanations of the fundamental concepts of environmental engineering (basic engineering calculations, engineering terminology, etc.), and provides detailed explanations of practice problems for each unit carefully selected from important past exam questions to enhance the completeness of learning and understanding.

We have significantly reduced the amount of study and memorization required for vague and unfamiliar subjects related to the fair examination standards, thereby helping to alleviate anxiety.

We are presenting the ability to pass the exam economically and efficiently by minimizing the trial and error of memorizing past exam questions without any background knowledge of the theory and resulting in wasteful and disappointing final results.

- An efficient and systematic study guide for passing the exam
Most test prep books do not reflect recent trends and instead cover all the types of questions that have appeared in the past, leaving a lot to study.
This textbook boldly discards past exam questions and focuses solely on current exam questions, easing your burden and helping you pass the exam with ease.

- From basic concepts to detailed technology of environmental engineering
Written by current subject-specific expert instructors, the book covers the basic concepts of environmental engineering (basic engineering calculations, engineering terminology, etc.) in detail so that even non-majors or beginners can understand them easily and quickly, and the completeness of each unit is enhanced through solutions to practice problems for each sub-unit.

- Practical CBT exam questions and explanations, past year's exam questions and explanations
We have carefully selected the latest actual questions from past CBT exams and provided detailed explanations for difficult questions to enhance learners' ability to adapt to written exams.

* 12 sets of past questions and answers for the Water Quality Engineer CBT and the past three years
* Water Quality and Environment Industry Engineer CBT past exam questions and explanations (6 sets) and past exam questions and explanations from the previous year (2020)
- Author-direct video lecture service in operation

We are currently providing direct lectures by the author of the Water Quality Environment (Industry) Engineer course through "Water Teacher.com," a specialized video lecture site for environmental certifications.
The video lectures for the written and practical exams of the Water Quality Engineer and Industrial Engineer, which utilize this book as a study guide, will greatly enhance the learning experience of test takers.

- A smooth community between teacher Lee Jong-hyeok and test takers
While many test-taking authors neglect to connect with their readers, author Jong-hyuk Lee has been running a specialized environmental certification community for over 20 years, working with test-takers nationwide every year.
If you search for "Mul-Teacher" on a portal site, you can receive close mentoring from the author through cafes and online video lecture sites.

[Naver Cafe] Teacher Mul and Teacher Gong's Environmental Certification Classroom https://cafe.naver.com/msenv
Moolssem.com Environment/Safety Online Education Site https://www.moolssem.com