100+ Free TN Water/Wastewater Operator Practice Questions

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Which agency administers water and wastewater operator certification in Tennessee?

Tennessee Department of Environment and Conservation (TDEC)

US Environmental Protection Agency

Tennessee Department of Health

Tennessee Board of Public Utilities

to track

2026 Statistics

Key Facts: TN Water/Wastewater Operator Exam

Grade I-IV

Certification Levels

TDEC

70%

Minimum Passing Score

TDEC

60 Days

Application Deadline Before Exam

TDEC Rules 0400-49-01

6/12 Hours

CE Hours (Grade I-II / III-IV)

TDEC

PSI CBT

Exam Administration

TDEC

Sample TN Water/Wastewater Operator Practice Questions

Try these sample questions to test your TN Water/Wastewater Operator exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which agency administers water and wastewater operator certification in Tennessee?

A.Tennessee Department of Environment and Conservation (TDEC)

B.US Environmental Protection Agency

C.Tennessee Department of Health

D.Tennessee Board of Public Utilities

Explanation: In Tennessee, Tennessee Department of Environment and Conservation (TDEC) administers the operator certification program, ensuring operators have the knowledge and skills to protect public health and the environment.

2What are the certification levels for water/wastewater operators in Tennessee?

A.Grade I through Grade IV (Grade IV highest), plus Small Water System

B.Only Level 1 and Level 2

C.Apprentice and Master only

D.No formal levels exist

Explanation: Tennessee uses Grade I through Grade IV (Grade IV highest), plus Small Water System for operator certification. Higher grades correspond to more complex facilities and require additional experience and education.

3What minimum passing score is required on Tennessee operator certification exams?

A.60%

B.65%

C.70%

D.80%

Explanation: Tennessee requires a minimum score of 70% on all water and wastewater operator certification exams administered through PSI Computer-Based Test (CBT) centers.

4How are operator certification exams administered in Tennessee?

A.Paper-based at state offices only

B.PSI Computer-Based Test (CBT) centers

C.Online from any location

D.Oral examination by board members

Explanation: Tennessee operator certification exams are administered through PSI Computer-Based Test (CBT) centers. Applicants must have their applications approved before scheduling.

5What education and experience does Tennessee require for Grade IV Water Treatment Plant Operator?

A.HS diploma and 12 months

B.Associate degree and 24 months

C.BS in engineering/chemistry/related science plus 12 months at Grade III-IV plant, OR HS plus 60 months at Grade III-IV plant

D.Any degree, no experience

Explanation: Tennessee offers two paths for Grade IV: (1) bachelor's in engineering/chemistry/related science + 12 months at Grade III/IV plant, or (2) high school + 60 months at Grade III/IV plant. Both require passing the exam.

6What happens in Tennessee if an operator fails the same exam twice?

A.Permanent ban

B.Must complete Board-sanctioned training (30 hrs for Grade III-IV, 18 hrs for Grade I-II) before reapplying

C.Immediate retake allowed

D.5-year wait

Explanation: Tennessee requires additional training after two failures: 30 hours of Board-sanctioned comprehensive training for Grade III/IV exams and 18 hours for Grade I/II exams before the Board will consider another application.

7What application form do Tennessee operator certification applicants submit?

A.Form CN-0704, signed, sworn, and notarized

B.Online form only

C.Verbal request

D.No formal application needed

Explanation: Tennessee requires Form CN-0704, which must be signed, sworn, and notarized. A separate application per certification is needed, submitted at least 60 days before the exam date.

8What are Tennessee's continuing education requirements for water operators?

A.None

B.6 hours for Grades I-II; 12 hours for Grades III-IV

C.100 hours annually

D.50 hours every 5 years

Explanation: Tennessee requires 6 contact hours of CE for Grade I and II operators and 12 contact hours for Grade III and IV operators per renewal period.

9What role does Tennessee's Fleming Training Center play?

A.Only exam testing location

B.Provides training courses and resources for operator certification and CE requirements

C.Issues licenses

D.Serves wastewater operators only

Explanation: TDEC's Fleming Training Center in Murfreesboro provides training courses for exam preparation and continuing education. It is a primary operator training resource in Tennessee.

10What Tennessee law governs water and wastewater operator certification?

A.Title 40

B.Tennessee Code Annotated Title 68, Chapter 221 and TDEC rules 0400-49-01

C.Federal EPA regulations only

D.County ordinances

Explanation: Tennessee operator certification is governed by TCA Title 68, Chapter 221 and TDEC rules 0400-49-01, establishing certification grades, exam requirements, and CE provisions.

About the TN Water/Wastewater Operator Exam

The Tennessee water/wastewater operator certification exam tests knowledge of TCA Title 68, Chapter 221, TDEC rules 0400-49-01, water treatment operations, wastewater treatment processes, distribution and collection systems, and laboratory testing. Grades I-IV are available for both water treatment and distribution operators.

Questions

100 scored questions

Time Limit

2.5 hours

Passing Score

70%

Exam Fee

Varies by grade (Tennessee TDEC / Water and Wastewater Operators Certification Board)

TN Water/Wastewater Operator Exam Content Outline

20%

State Laws & Regulations

TCA Title 68 and TDEC rules 0400-49-01, Grade I-IV requirements, Fleming Training Center, and CE requirements

25%

Water Treatment

Disinfection, coagulation, filtration, CT calculations, and SDWA compliance

25%

Wastewater Treatment

Activated sludge, sludge handling, NPDES permits, biological nutrient removal, and safety

15%

Distribution & Collection

Cross-connection control, backflow prevention, pump operations, hydraulics, and system maintenance

15%

Laboratory & Math

Water quality testing, sampling, math calculations, record-keeping, and reporting

How to Pass the TN Water/Wastewater Operator Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 2.5 hours
Exam fee: Varies by grade

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

TN Water/Wastewater Operator Study Tips from Top Performers

1Review TCA Title 68, Chapter 221 and TDEC rules 0400-49-01 for certification grades and requirements

2Study Grade IV requirements: two pathways based on education and experience

3Master the activated sludge process: SVI, F/M ratio, MLSS, and RAS/WAS control

4Practice chlorine and pump calculations: lbs formula, detention time, water horsepower

5Utilize TDEC Fleming Training Center resources for exam preparation

Frequently Asked Questions

What certification grades does Tennessee offer for water operators?

Tennessee offers Grade I (lowest) through Grade IV (highest) for both water treatment plant operators and water distribution system operators, plus a Small Water System certification.

How are Tennessee operator exams administered?

Exams are computer-based at PSI testing centers. The testing window runs September through November. Applications (Form CN-0704, notarized) must be submitted at least 60 days before the exam.

What happens if I fail the same Tennessee exam twice?

You must complete Board-sanctioned training before reapplying: 30 hours for Grade III/IV exams or 18 hours for Grade I/II exams.

What are Tennessee's continuing education requirements?

Grade I and II operators need 6 hours of CE; Grade III and IV operators need 12 hours of CE per renewal period.

What is the Grade IV certification requirement?

Either a BS in engineering/chemistry/related science plus 12 months at a Grade III-IV plant, OR a high school diploma plus 60 months at a Grade III-IV plant.