Kentucky Certified Septic System
Installer Exam With Actual 120
Questions & Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/
2025/2026 /Latest Update/Instant
Download Pdf
Section 1 – Fundamentals of Septic Systems
1. What is the primary purpose of a septic system?
a) To filter drinking water
b) To collect stormwater runoff
c) To treat and dispose of household wastewater
d) To store potable water
c) To treat and dispose of household wastewater
Rationale: Septic systems are designed to safely treat and dispose of household
sewage onsite.
2. Which component of a septic system allows solids to settle before effluent moves to
the drainfield?
a) Distribution box
b) Septic tank
c) Effluent filter
d) Soil absorption system
b) Septic tank
Rationale: The septic tank separates solids and provides primary treatment of
wastewater.
3. In Kentucky, who regulates the installation of onsite septic systems?
a) U.S. EPA
b) County health departments under state guidelines
c) Local zoning board
d) Federal water authority
, b) County health departments under state guidelines
Rationale: Local health departments enforce state regulations regarding septic
installation.
4. What type of soil is generally most suitable for a septic system absorption field?
a) Clay
b) Loam
c) Bedrock
d) Silt
b) Loam
Rationale: Loamy soil has balanced permeability and water retention for treatment.
5. What is the minimum setback distance from a private water well to a septic tank in
Kentucky?
a) 10 feet
b) 50 feet
c) 100 feet
d) 25 feet
b) 50 feet
Rationale: To protect groundwater, Kentucky requires 50 feet separation.
6. The percolation test is primarily used to determine:
a) Soil color
b) Soil permeability
c) Soil nutrient content
d) Groundwater levels
b) Soil permeability
Rationale: Perc tests measure drainage rate, guiding drainfield design.
7. What does the effluent filter in a septic tank do?
a) Prevents odors
b) Filters solids before effluent enters the drainfield
c) Breaks down sludge
d) Adds chemicals for disinfection
b) Filters solids before effluent enters the drainfield
Rationale: Prevents solids from clogging drainfield lines.
8. A mound septic system is typically used when:
a) The groundwater table is high
b) Soil is excessively sandy
c) Rock is too deep
d) The lot is too large
, a) The groundwater table is high
Rationale: Raised mounds provide separation above shallow groundwater.
9. Which type of pipe is most commonly used for septic system distribution lines?
a) Cast iron
b) Copper
c) PVC
d) Galvanized steel
c) PVC
Rationale: PVC is lightweight, durable, and corrosion-resistant.
10. What is the recommended minimum septic tank size for a three-bedroom house in
Kentucky?
a) 500 gallons
b) 750 gallons
c) 1,000 gallons
d) 1,500 gallons
c) 1,000 gallons
Rationale: State standards require 1,000 gallons for typical 3-bedroom homes.
Section 2 – Site Evaluation and Design
11. Which factor most influences drainfield sizing?
a) Roof size
b) Soil permeability
c) Water heater size
d) Household appliances
b) Soil permeability
Rationale: Faster draining soils require smaller areas, slow soils larger ones.
12. A distribution box is installed to:
a) Store sewage
b) Distribute effluent evenly to drainfield lines
c) Filter solids
d) Provide aeration
b) Distribute effluent evenly to drainfield lines
Rationale: Equal flow prevents overloading one trench.
13. What must be done before installing a septic system in Kentucky?
a) Obtain a building permit only
b) Obtain an onsite system permit from the health department
c) Submit a request to the zoning board
Installer Exam With Actual 120
Questions & Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/
2025/2026 /Latest Update/Instant
Download Pdf
Section 1 – Fundamentals of Septic Systems
1. What is the primary purpose of a septic system?
a) To filter drinking water
b) To collect stormwater runoff
c) To treat and dispose of household wastewater
d) To store potable water
c) To treat and dispose of household wastewater
Rationale: Septic systems are designed to safely treat and dispose of household
sewage onsite.
2. Which component of a septic system allows solids to settle before effluent moves to
the drainfield?
a) Distribution box
b) Septic tank
c) Effluent filter
d) Soil absorption system
b) Septic tank
Rationale: The septic tank separates solids and provides primary treatment of
wastewater.
3. In Kentucky, who regulates the installation of onsite septic systems?
a) U.S. EPA
b) County health departments under state guidelines
c) Local zoning board
d) Federal water authority
, b) County health departments under state guidelines
Rationale: Local health departments enforce state regulations regarding septic
installation.
4. What type of soil is generally most suitable for a septic system absorption field?
a) Clay
b) Loam
c) Bedrock
d) Silt
b) Loam
Rationale: Loamy soil has balanced permeability and water retention for treatment.
5. What is the minimum setback distance from a private water well to a septic tank in
Kentucky?
a) 10 feet
b) 50 feet
c) 100 feet
d) 25 feet
b) 50 feet
Rationale: To protect groundwater, Kentucky requires 50 feet separation.
6. The percolation test is primarily used to determine:
a) Soil color
b) Soil permeability
c) Soil nutrient content
d) Groundwater levels
b) Soil permeability
Rationale: Perc tests measure drainage rate, guiding drainfield design.
7. What does the effluent filter in a septic tank do?
a) Prevents odors
b) Filters solids before effluent enters the drainfield
c) Breaks down sludge
d) Adds chemicals for disinfection
b) Filters solids before effluent enters the drainfield
Rationale: Prevents solids from clogging drainfield lines.
8. A mound septic system is typically used when:
a) The groundwater table is high
b) Soil is excessively sandy
c) Rock is too deep
d) The lot is too large
, a) The groundwater table is high
Rationale: Raised mounds provide separation above shallow groundwater.
9. Which type of pipe is most commonly used for septic system distribution lines?
a) Cast iron
b) Copper
c) PVC
d) Galvanized steel
c) PVC
Rationale: PVC is lightweight, durable, and corrosion-resistant.
10. What is the recommended minimum septic tank size for a three-bedroom house in
Kentucky?
a) 500 gallons
b) 750 gallons
c) 1,000 gallons
d) 1,500 gallons
c) 1,000 gallons
Rationale: State standards require 1,000 gallons for typical 3-bedroom homes.
Section 2 – Site Evaluation and Design
11. Which factor most influences drainfield sizing?
a) Roof size
b) Soil permeability
c) Water heater size
d) Household appliances
b) Soil permeability
Rationale: Faster draining soils require smaller areas, slow soils larger ones.
12. A distribution box is installed to:
a) Store sewage
b) Distribute effluent evenly to drainfield lines
c) Filter solids
d) Provide aeration
b) Distribute effluent evenly to drainfield lines
Rationale: Equal flow prevents overloading one trench.
13. What must be done before installing a septic system in Kentucky?
a) Obtain a building permit only
b) Obtain an onsite system permit from the health department
c) Submit a request to the zoning board
