ADEQ Grade 1 Certification Exam Prep: 630 Practice Questions & Rationales for Wastewater & Water Operators

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Grade 1 Wastewater Treatment, Water
Distribution, and Wastewater Collection Exam
Review Test Bank 630 Real Exam Questions with
Correct Answers and Detailed Rationales ADEQ
Grade 1 Certification Exam Prep – Complete A+
Guide | Latest 2026




TABLE OF CONTENTS

Section Topic Area Question


Part 1: Wastewater Treatment
Grade 1


Section 1.1 Basic Wastewater Treatment Concepts 1-30


Section 1.2 Preliminary and Primary Treatment 31-55


Secondary Treatment (Trickling Filters,
Section 1.3 56-80
Activated Sludge)

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Section Topic Area Question


Section 1.4 Disinfection and Chlorination 81-100


Section 1.5 Sludge Handling and Disposal 101-120


Section 1.6 Laboratory Procedures and Sampling 121-140


Section 1.7 Safety and Regulations 141-160


Part 2: Water Distribution
Grade 1


Section 2.1 Water Sources and Quality 161-185


Section 2.2 Distribution System Components 186-210


Section 2.3 Pumps and Hydraulics 211-235


Section 2.4 Valves and Hydrants 236-260


Section 2.5 Meters and Service Lines 261-280


Cross-Connection Control and Backflow
Section 2.6 281-300
Prevention

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Section Topic Area Question


Section 2.7 Disinfection and System Maintenance 301-320


Section 2.8 Safety and Regulatory Compliance 321-340


Part 3: Wastewater Collection
Grade 1


Wastewater Collection System
Section 3.1 341-365
Components


Section 3.2 Pipe Materials and Installation 366-390


Section 3.3 Lift Stations and Pumps 391-415


Section 3.4 Cleaning and Maintenance 416-440


Section 3.5 Inspection and Testing 441-465


Section 3.6 Manholes and Appurtenances 466-485


Section 3.7 Safety in Collection Systems 486-505


Section 3.8 Regulatory Requirements 506-525

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Section Topic Area Question


Part 4: Calculations and Math


Section 4.1 Wastewater Treatment Calculations 526-545


Section 4.2 Water Distribution Calculations 546-565


Section 4.3 Wastewater Collection Calculations 566-585


Section 4.4 General Math Review 586-600


Part 5: Comprehensive
Practice Exams


Section 5.1 Wastewater Treatment Practice Exam 601-610


Section 5.2 Water Distribution Practice Exam 611-620


Section 5.3 Wastewater Collection Practice Exam 621-630




PART 1: WASTEWATER TREATMENT GRADE 1

SECTION 1.1: BASIC WASTEWATER TREATMENT CONCEPTS