20-FL-X Certified Designated
Representative Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary responsibility of a Certified Designated
Representative (CDR) in Florida?
A. Selling real estate properties
B. Designing and overseeing onsite sewage treatment systems
C. Conducting property appraisals
D. Inspecting commercial buildings
Answer: B
Rationale: A Certified Designated Representative (CDR) is primarily
responsible for the design, inspection, and oversight of onsite sewage
treatment and disposal systems (OSTDS). This includes ensuring
,systems meet regulatory standards and function properly to protect
public health and the environment.
2. Which Florida agency regulates onsite sewage treatment and
disposal systems (OSTDS)?
A. Florida Department of Agriculture
B. Florida Department of Environmental Protection
C. Florida Department of Health
D. Florida Department of Business and Professional Regulation
Answer: C
Rationale: The Florida Department of Health (FDOH) is responsible for
regulating OSTDS, including permitting, inspections, and enforcement
of applicable rules.
3. What is the minimum setback distance typically required between
a septic tank and a potable water well?
A. 25 feet
B. 50 feet
C. 75 feet
D. 100 feet
,Answer: C
Rationale: Florida regulations generally require a minimum setback of
75 feet between a septic tank and a potable water well to prevent
contamination of drinking water sources.
4. What is the purpose of a drainfield in an OSTDS?
A. Store wastewater permanently
B. Filter and disperse treated effluent into the soil
C. Pump wastewater into municipal systems
D. Collect stormwater runoff
Answer: B
Rationale: The drainfield is designed to distribute treated wastewater
into the soil, where natural filtration and biological processes further
treat the effluent.
5. Which soil characteristic is most important when evaluating a site
for septic system installation?
A. Color
B. Texture and permeability
C. Temperature
D. Mineral content
, Answer: B
Rationale: Soil texture and permeability determine how well
wastewater can percolate and be treated. Poor permeability can lead
to system failure or contamination.
6. What is a limiting layer in soil evaluation?
A. A layer that enhances filtration
B. A layer that restricts water movement
C. A layer rich in nutrients
D. A layer of organic material
Answer: B
Rationale: A limiting layer, such as clay or rock, restricts water
movement and can hinder proper drainage, making it critical in
system design decisions.
7. Which component separates solids from liquids in a septic
system?
A. Distribution box
B. Drainfield
C. Septic tank
D. Pump chamber
Representative Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary responsibility of a Certified Designated
Representative (CDR) in Florida?
A. Selling real estate properties
B. Designing and overseeing onsite sewage treatment systems
C. Conducting property appraisals
D. Inspecting commercial buildings
Answer: B
Rationale: A Certified Designated Representative (CDR) is primarily
responsible for the design, inspection, and oversight of onsite sewage
treatment and disposal systems (OSTDS). This includes ensuring
,systems meet regulatory standards and function properly to protect
public health and the environment.
2. Which Florida agency regulates onsite sewage treatment and
disposal systems (OSTDS)?
A. Florida Department of Agriculture
B. Florida Department of Environmental Protection
C. Florida Department of Health
D. Florida Department of Business and Professional Regulation
Answer: C
Rationale: The Florida Department of Health (FDOH) is responsible for
regulating OSTDS, including permitting, inspections, and enforcement
of applicable rules.
3. What is the minimum setback distance typically required between
a septic tank and a potable water well?
A. 25 feet
B. 50 feet
C. 75 feet
D. 100 feet
,Answer: C
Rationale: Florida regulations generally require a minimum setback of
75 feet between a septic tank and a potable water well to prevent
contamination of drinking water sources.
4. What is the purpose of a drainfield in an OSTDS?
A. Store wastewater permanently
B. Filter and disperse treated effluent into the soil
C. Pump wastewater into municipal systems
D. Collect stormwater runoff
Answer: B
Rationale: The drainfield is designed to distribute treated wastewater
into the soil, where natural filtration and biological processes further
treat the effluent.
5. Which soil characteristic is most important when evaluating a site
for septic system installation?
A. Color
B. Texture and permeability
C. Temperature
D. Mineral content
, Answer: B
Rationale: Soil texture and permeability determine how well
wastewater can percolate and be treated. Poor permeability can lead
to system failure or contamination.
6. What is a limiting layer in soil evaluation?
A. A layer that enhances filtration
B. A layer that restricts water movement
C. A layer rich in nutrients
D. A layer of organic material
Answer: B
Rationale: A limiting layer, such as clay or rock, restricts water
movement and can hinder proper drainage, making it critical in
system design decisions.
7. Which component separates solids from liquids in a septic
system?
A. Distribution box
B. Drainfield
C. Septic tank
D. Pump chamber
