Florida Wastewater Treatment Plant Operator Class B
Certification Exam
350 Practice Questions with Detailed Answers and
Rationales
2026 Edition | Based on FDEP Regulations and Standard
Operating Procedures
Instructions: This comprehensive practice examination is designed
to help you prepare for the Florida Class B wastewater operator
certification exam. Questions are organized by topic area and
reflect actual exam content, including FDEP regulations, process
control calculations, safety procedures, and troubleshooting
scenarios. Select the best answer for each question, then review the
detailed rationales to reinforce your understanding.
TABLE OF CONTENTS
Section Topic Question
Florida Administrative Code (FAC) & Regulatory
I 1-35
Requirements
,Section Topic Question
Preliminary Treatment: Screens, Grit, and
II 36-55
Comminutors
III Primary Treatment: Sedimentation and Clarifiers 56-75
IV Activated Sludge Process Control 76-115
V Fixed Film Systems: Trickling Filters & RBCs 116-130
VI Stabilization Ponds and Lagoons 131-145
VII Disinfection: Chlorination, UV, and Dechlorination 146-175
VIII Sludge Handling, Digestion, and Solids Management 176-205
IX Laboratory Procedures and Process Monitoring 206-235
X Pumps, Motors, and Mechanical Equipment 236-260
XI Safety, Confined Space, and Chemical Handling 261-285
,Section Topic Question
XII Calculations and Process Control Mathematics 286-320
XIII Troubleshooting and Operational Scenarios 321-350
SECTION I: FLORIDA ADMINISTRATIVE CODE (FAC) &
REGULATORY REQUIREMENTS
1. According to FDEP Chapter 62-600.440(4)(b) FAC, basic level
disinfection is defined as:
A. A chlorine residual of 0.2 mg/L for 30 minutes at average flow
B. A chlorine residual of 0.5 mg/L for 15 minutes at peak
hourly flow
C. A chlorine residual of 1.0 mg/L for 15 minutes at peak hourly
flow
D. A chlorine residual of 2.0 mg/L for 30 minutes at any flow
Answer: B
Rationale: Florida Administrative Code 62-600.440(4)(b)
specifically defines basic level disinfection as maintaining a
chlorine residual of 0.5 mg/L for a minimum contact time of
, 15 minutes at peak hourly flow. This is the minimum standard
for disinfection of domestic wastewater in Florida .
2. FDEP Chapter 62-604.550(a) FAC requires that a wastewater spill
be verbally reported to the State Warning Point:
A. Immediately upon discovery
B. No later than 24 hours from discovery
C. Within 48 hours
D. By the end of the business week
Answer: B
Rationale: According to Florida regulations, any wastewater
spill must be verbally reported to the State Warning Point
within 24 hours of discovery. This allows for timely response
and public notification if necessary .
3. According to FDEP Chapter 62-602 FAC, an operator could have
their license permanently revoked for:
A. Failing to attend continuing education courses
B. Falsifying or misrepresenting reports, logs, or laboratory sheets
Certification Exam
350 Practice Questions with Detailed Answers and
Rationales
2026 Edition | Based on FDEP Regulations and Standard
Operating Procedures
Instructions: This comprehensive practice examination is designed
to help you prepare for the Florida Class B wastewater operator
certification exam. Questions are organized by topic area and
reflect actual exam content, including FDEP regulations, process
control calculations, safety procedures, and troubleshooting
scenarios. Select the best answer for each question, then review the
detailed rationales to reinforce your understanding.
TABLE OF CONTENTS
Section Topic Question
Florida Administrative Code (FAC) & Regulatory
I 1-35
Requirements
,Section Topic Question
Preliminary Treatment: Screens, Grit, and
II 36-55
Comminutors
III Primary Treatment: Sedimentation and Clarifiers 56-75
IV Activated Sludge Process Control 76-115
V Fixed Film Systems: Trickling Filters & RBCs 116-130
VI Stabilization Ponds and Lagoons 131-145
VII Disinfection: Chlorination, UV, and Dechlorination 146-175
VIII Sludge Handling, Digestion, and Solids Management 176-205
IX Laboratory Procedures and Process Monitoring 206-235
X Pumps, Motors, and Mechanical Equipment 236-260
XI Safety, Confined Space, and Chemical Handling 261-285
,Section Topic Question
XII Calculations and Process Control Mathematics 286-320
XIII Troubleshooting and Operational Scenarios 321-350
SECTION I: FLORIDA ADMINISTRATIVE CODE (FAC) &
REGULATORY REQUIREMENTS
1. According to FDEP Chapter 62-600.440(4)(b) FAC, basic level
disinfection is defined as:
A. A chlorine residual of 0.2 mg/L for 30 minutes at average flow
B. A chlorine residual of 0.5 mg/L for 15 minutes at peak
hourly flow
C. A chlorine residual of 1.0 mg/L for 15 minutes at peak hourly
flow
D. A chlorine residual of 2.0 mg/L for 30 minutes at any flow
Answer: B
Rationale: Florida Administrative Code 62-600.440(4)(b)
specifically defines basic level disinfection as maintaining a
chlorine residual of 0.5 mg/L for a minimum contact time of
, 15 minutes at peak hourly flow. This is the minimum standard
for disinfection of domestic wastewater in Florida .
2. FDEP Chapter 62-604.550(a) FAC requires that a wastewater spill
be verbally reported to the State Warning Point:
A. Immediately upon discovery
B. No later than 24 hours from discovery
C. Within 48 hours
D. By the end of the business week
Answer: B
Rationale: According to Florida regulations, any wastewater
spill must be verbally reported to the State Warning Point
within 24 hours of discovery. This allows for timely response
and public notification if necessary .
3. According to FDEP Chapter 62-602 FAC, an operator could have
their license permanently revoked for:
A. Failing to attend continuing education courses
B. Falsifying or misrepresenting reports, logs, or laboratory sheets
