Page 1 of 39
TEXAS SEPTIC INSTALLER LICENSING EXAM NEWEST
2026 ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {100 Q & A} ALREADY GRADED A+ |
BRAND NEW! | 100% GUARANTEED PASS
1. An OSSF permit may be denied if:
a) The soil does not meet minimum percolation or
depth requirements
b) The tank is less than 2 years old
c) The house is not occupied
d) The owner does not want chlorine
Rationale: Soil conditions that do not support treatment are
valid reasons to deny a permit.
2. A system permit becomes void if installation is
not completed within how many months?
a) 6
b) 9
c) 12
d) 18
Rationale: Texas permits expire if the system is not
installed within 12 months of issuance.
3. Which of the following requires immediate reporting
to TCEQ?
a) Increased water bill
b) Landscaping near the tank
c) System discharge onto ground surface
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d) Septic odor near vent
Rationale: Surface discharge is a public health violation and
must be reported.
4. When is a professional maintenance contract required
by law?
a) All systems
b) Only for systems near water
c) For all aerobic treatment systems
d) If the owner requests
Rationale: Aerobic systems require routine inspection and
maintenance under a contract.
5. Gravel-less pipe systems use:
a) Corrugated pipe with geotextile material
b) Concrete tiles
c) Poured gravel
d) Clay pipes
Rationale: Gravel-less systems are a modern alternative
using pipe wrapped in geotextile for absorption.
6. A maintenance contract is required for which type
of OSSF system?
a) Standard septic tank
b) Aerobic treatment unit
c) Gravel-less trench
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d) Conventional system with effluent filter
Rationale: ATUs must be maintained under contract by a
licensed provider to ensure performance.
7. What should be done before backfilling a
septic tank installation?
a) Add water to tank
b) Inspection by the permitting authority
c) Start using the system
d) Install distribution box
Rationale: The permitting authority must inspect the system
before it’s covered to verify compliance.
8. The minimum separation distance between a septic
tank and a public water supply well is:
a) 50 feet
b) 100 feet
c) 150 feet
d) 200 feet
Rationale: Texas requires at least 150 feet of separation
between septic tanks and public water wells.
9. What happens if a septic tank is installed out of level?
a) It may lead to solids clogging the outlet
b) Water will evaporate faster
c) The tank will self-adjust
d) Chlorine won’t work
Rationale: An uneven tank may not settle solids properly,
leading to outlet clogging and failure.
10. The typical lifespan of a properly
maintained conventional OSSF system is:
a) 5–10 years
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b) 10–15 years
c) 20–30 years
d) 40–50 years
Rationale: A properly maintained system can last 20 to 30
years or more.
11. A permit is not required for which of the following
in Texas?
a) Installing a new septic system
b) Modifying an existing system
c) Replacing a broken sprinkler head in an existing spray
system
d) Expanding an absorption field
Rationale: Minor repairs like replacing sprinkler heads
don’t require new permits.
12. A visual sign of high water usage in the home may be:
a) Yellow grass
b) Continual wetness near the drain field
c) Rotten egg smell inside
d) Cloudy tap water
Rationale: Overuse of water may cause saturation of the
drain field, leading to surfacing water.
13. A two-compartment septic tank is designed to:
a) Mix incoming wastewater
b) Settle solids in stages for improved separation
c) Accelerate sludge buildup
d) Reduce odor
Rationale: Two compartments improve settling by allowing
solids to separate in two stages.
14. Before installation begins, what must be verified on-
site?
TEXAS SEPTIC INSTALLER LICENSING EXAM NEWEST
2026 ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {100 Q & A} ALREADY GRADED A+ |
BRAND NEW! | 100% GUARANTEED PASS
1. An OSSF permit may be denied if:
a) The soil does not meet minimum percolation or
depth requirements
b) The tank is less than 2 years old
c) The house is not occupied
d) The owner does not want chlorine
Rationale: Soil conditions that do not support treatment are
valid reasons to deny a permit.
2. A system permit becomes void if installation is
not completed within how many months?
a) 6
b) 9
c) 12
d) 18
Rationale: Texas permits expire if the system is not
installed within 12 months of issuance.
3. Which of the following requires immediate reporting
to TCEQ?
a) Increased water bill
b) Landscaping near the tank
c) System discharge onto ground surface
,Page 2 of 39
d) Septic odor near vent
Rationale: Surface discharge is a public health violation and
must be reported.
4. When is a professional maintenance contract required
by law?
a) All systems
b) Only for systems near water
c) For all aerobic treatment systems
d) If the owner requests
Rationale: Aerobic systems require routine inspection and
maintenance under a contract.
5. Gravel-less pipe systems use:
a) Corrugated pipe with geotextile material
b) Concrete tiles
c) Poured gravel
d) Clay pipes
Rationale: Gravel-less systems are a modern alternative
using pipe wrapped in geotextile for absorption.
6. A maintenance contract is required for which type
of OSSF system?
a) Standard septic tank
b) Aerobic treatment unit
c) Gravel-less trench
,Page 3 of 39
d) Conventional system with effluent filter
Rationale: ATUs must be maintained under contract by a
licensed provider to ensure performance.
7. What should be done before backfilling a
septic tank installation?
a) Add water to tank
b) Inspection by the permitting authority
c) Start using the system
d) Install distribution box
Rationale: The permitting authority must inspect the system
before it’s covered to verify compliance.
8. The minimum separation distance between a septic
tank and a public water supply well is:
a) 50 feet
b) 100 feet
c) 150 feet
d) 200 feet
Rationale: Texas requires at least 150 feet of separation
between septic tanks and public water wells.
9. What happens if a septic tank is installed out of level?
a) It may lead to solids clogging the outlet
b) Water will evaporate faster
c) The tank will self-adjust
d) Chlorine won’t work
Rationale: An uneven tank may not settle solids properly,
leading to outlet clogging and failure.
10. The typical lifespan of a properly
maintained conventional OSSF system is:
a) 5–10 years
, Page 4 of 39
b) 10–15 years
c) 20–30 years
d) 40–50 years
Rationale: A properly maintained system can last 20 to 30
years or more.
11. A permit is not required for which of the following
in Texas?
a) Installing a new septic system
b) Modifying an existing system
c) Replacing a broken sprinkler head in an existing spray
system
d) Expanding an absorption field
Rationale: Minor repairs like replacing sprinkler heads
don’t require new permits.
12. A visual sign of high water usage in the home may be:
a) Yellow grass
b) Continual wetness near the drain field
c) Rotten egg smell inside
d) Cloudy tap water
Rationale: Overuse of water may cause saturation of the
drain field, leading to surfacing water.
13. A two-compartment septic tank is designed to:
a) Mix incoming wastewater
b) Settle solids in stages for improved separation
c) Accelerate sludge buildup
d) Reduce odor
Rationale: Two compartments improve settling by allowing
solids to separate in two stages.
14. Before installation begins, what must be verified on-
site?
