2026/2027 TEXAS ON SITE SEWAGE FACILITY (OSSF) INSTALLER II
EXAM COMPLETE ACTUAL EXAM REAL QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES (100%
CORRECT VERIFIED SOLUTIONS) NEWEST UPDATED VERSION
|GUARANTEED PASS A+ |APPROVED EXAM 2026/2027
1. Before installing an OSSF, the installer must ensure:
A. Materials are delivered
B. Weather is clear
C. An authorization to construct has been issued
D. The homeowner signs a contract
Correct Answer- C
Rationale: Installation without authorization is a violation of TCEQ
rules.
2. The primary authority regulating OSSF systems in Texas is:
A. Texas Department of Health
B. Texas Commission on Environmental Quality (TCEQ)
C. EPA
D. Texas Water Development Board
Correct Answer-B
Rationale: TCEQ administers and enforces OSSF rules under 30
TAC Chapter 285.
3. Installer II licensing allows installation of:
,A. Standard septic systems only
B. Gravity systems only
C. All OSSF systems, including aerobic and pump systems
D. Design-only systems
Correct answer- C
Rationale: Installer II is required for advanced systems beyond
basic gravity.
4. Which document contains the rules governing OSSF installation
in Texas?
A. Texas Plumbing Code
B. EPA Manual
C. 30 TAC Chapter 285
D. OSHA Standards
Correct Answer- C
Rationale: Chapter 285 is the foundation of all OSSF requirements.
5. Soil texture primarily affects:
A. Cost
B. Odor
C. Absorption and hydraulic loading rate
D. Pipe material
Rationale: Soil determines how wastewater disperses and how large
the system must be.
, 6. Which soil has the LOWEST absorption rate?
A. Sandy loam
B. Loam
C. Clay
D. Gravel
Correct Answer- C
Rationale: Clay has very low permeability and requires larger
disposal areas.
7. Limiting conditions include all EXCEPT:
A. Groundwater
B. Bedrock
C. Restrictive clay layer
D. Topsoil
Correct Answer- D
Rationale: Topsoil is not a limiting condition; subsurface conditions
are.
8. Minimum separation between drain field and groundwater is:
A. 6 inches
B. 12 inches
C. 24 inches
D. 36 inches
Correct Answer- C
EXAM COMPLETE ACTUAL EXAM REAL QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES (100%
CORRECT VERIFIED SOLUTIONS) NEWEST UPDATED VERSION
|GUARANTEED PASS A+ |APPROVED EXAM 2026/2027
1. Before installing an OSSF, the installer must ensure:
A. Materials are delivered
B. Weather is clear
C. An authorization to construct has been issued
D. The homeowner signs a contract
Correct Answer- C
Rationale: Installation without authorization is a violation of TCEQ
rules.
2. The primary authority regulating OSSF systems in Texas is:
A. Texas Department of Health
B. Texas Commission on Environmental Quality (TCEQ)
C. EPA
D. Texas Water Development Board
Correct Answer-B
Rationale: TCEQ administers and enforces OSSF rules under 30
TAC Chapter 285.
3. Installer II licensing allows installation of:
,A. Standard septic systems only
B. Gravity systems only
C. All OSSF systems, including aerobic and pump systems
D. Design-only systems
Correct answer- C
Rationale: Installer II is required for advanced systems beyond
basic gravity.
4. Which document contains the rules governing OSSF installation
in Texas?
A. Texas Plumbing Code
B. EPA Manual
C. 30 TAC Chapter 285
D. OSHA Standards
Correct Answer- C
Rationale: Chapter 285 is the foundation of all OSSF requirements.
5. Soil texture primarily affects:
A. Cost
B. Odor
C. Absorption and hydraulic loading rate
D. Pipe material
Rationale: Soil determines how wastewater disperses and how large
the system must be.
, 6. Which soil has the LOWEST absorption rate?
A. Sandy loam
B. Loam
C. Clay
D. Gravel
Correct Answer- C
Rationale: Clay has very low permeability and requires larger
disposal areas.
7. Limiting conditions include all EXCEPT:
A. Groundwater
B. Bedrock
C. Restrictive clay layer
D. Topsoil
Correct Answer- D
Rationale: Topsoil is not a limiting condition; subsurface conditions
are.
8. Minimum separation between drain field and groundwater is:
A. 6 inches
B. 12 inches
C. 24 inches
D. 36 inches
Correct Answer- C
