A reference book containing the pollution control manager examination questions from the past five years. Includes explanations for skill development. - Title: Pollution Control Manager National Examination: Correct Answers and Hints - Author: Water Quality Category 1 and Category 4 - Target Years: 2018-2022 - Applicable Year: 2023 - Contents: Contains past five years' worth of exam questions - Features: Includes explanations for skill development - Format: Reference book Thank you for viewing. Some answers have been marked with circles, crosses, and diagonal lines.