OSSF DR EXAM (ACTUAL EXAM) WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
D. 30-40% B.O.D reduced, 60-70% suspended solids (TSS) reduced -
ANSWERS-As a primary treatment process, a properly operating septic tank
can be expected to perform as follows.
A. 30-40% B.O.D reduced, 20-30% suspended solids (TSS) reduced
B. 40-50% B.O.D reduced, 20-30% suspended solids (TSS) reduced
C. 20-30% B.O.D increased, 50-60% suspended Solids (TSS) reduced
D. 30-40% B.O.D reduced, 60-70% suspended solids (TSS) reduced
A. Leaching Chambers - ANSWERS-______ are bottomless chambers used in
subsurface drain fields.
A. Leaching Chambers
B. Suction Chambers
C. Draining Chambers
D. Deep Chambers
,True - ANSWERS-True or False:
Site evaluation criteria includes the following:
Soil analysis/groundwater evaluation/topography/flood hazard/separation
requirements
True - ANSWERS-True or False:
All site patterns of the site shall be indicated on the site drawing.
False - They are considered unsuitable - ANSWERS-True or False:
Slopes greater than 30% are considered suitable.
True - ANSWERS-Slopes of less than 2% should be avoided or improved to
provide drainage from the drain field.
C. Contour lines - ANSWERS-Imaginary lines of constant elevation on the
surface of the ground. A line connecting points of equal elevation.
A. Blurred lines
B. Connecting lines
C. Contour lines
D. White lines
, The law gives the local government the right to adopt local regulations that
are more stringent than the state OSSF law or rules.
True - ANSWERS-True or False:
The following are key elements of the Texas OSSF rules:
On-site sewage disposal system, Agency/Commission, Authorized Agent (AA),
Designated Representative (DR), Installer, Apprentice, Site-Evaluator (SE),
Maintenance Provider (MP), and Maintenance Technician.
On-Site Sewage Disposal System: - ANSWERS-One or more systems of
treatment devices and disposal facilities that:
- Produce not more than 5,000 gallons of waste each day:
- Are used only for disposal of sewage produced on the site where the system
is located (new cluster systems are prohibited); and
-Dispose of wastewater on-site into the soil or as a vapor to the atmosphere.
Agency/Commission - ANSWERS-TCEQ is the state agency responsible for
making sure that OSSF laws, rules, and regulations are enforces statewide
Authorized Agent (AA) - ANSWERS-The local government entity authorized by
the TQEC to implement and enforce the OSSF laws and regulations.
Designated Representative - ANSWERS-An individual who holds a DR license
and is designated by the authorized agent to review permit applications,
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
D. 30-40% B.O.D reduced, 60-70% suspended solids (TSS) reduced -
ANSWERS-As a primary treatment process, a properly operating septic tank
can be expected to perform as follows.
A. 30-40% B.O.D reduced, 20-30% suspended solids (TSS) reduced
B. 40-50% B.O.D reduced, 20-30% suspended solids (TSS) reduced
C. 20-30% B.O.D increased, 50-60% suspended Solids (TSS) reduced
D. 30-40% B.O.D reduced, 60-70% suspended solids (TSS) reduced
A. Leaching Chambers - ANSWERS-______ are bottomless chambers used in
subsurface drain fields.
A. Leaching Chambers
B. Suction Chambers
C. Draining Chambers
D. Deep Chambers
,True - ANSWERS-True or False:
Site evaluation criteria includes the following:
Soil analysis/groundwater evaluation/topography/flood hazard/separation
requirements
True - ANSWERS-True or False:
All site patterns of the site shall be indicated on the site drawing.
False - They are considered unsuitable - ANSWERS-True or False:
Slopes greater than 30% are considered suitable.
True - ANSWERS-Slopes of less than 2% should be avoided or improved to
provide drainage from the drain field.
C. Contour lines - ANSWERS-Imaginary lines of constant elevation on the
surface of the ground. A line connecting points of equal elevation.
A. Blurred lines
B. Connecting lines
C. Contour lines
D. White lines
, The law gives the local government the right to adopt local regulations that
are more stringent than the state OSSF law or rules.
True - ANSWERS-True or False:
The following are key elements of the Texas OSSF rules:
On-site sewage disposal system, Agency/Commission, Authorized Agent (AA),
Designated Representative (DR), Installer, Apprentice, Site-Evaluator (SE),
Maintenance Provider (MP), and Maintenance Technician.
On-Site Sewage Disposal System: - ANSWERS-One or more systems of
treatment devices and disposal facilities that:
- Produce not more than 5,000 gallons of waste each day:
- Are used only for disposal of sewage produced on the site where the system
is located (new cluster systems are prohibited); and
-Dispose of wastewater on-site into the soil or as a vapor to the atmosphere.
Agency/Commission - ANSWERS-TCEQ is the state agency responsible for
making sure that OSSF laws, rules, and regulations are enforces statewide
Authorized Agent (AA) - ANSWERS-The local government entity authorized by
the TQEC to implement and enforce the OSSF laws and regulations.
Designated Representative - ANSWERS-An individual who holds a DR license
and is designated by the authorized agent to review permit applications,
