Texas OSSF Installer II Exam – Exam Practice Questions and
Correct Answers (Verified Answers) Plus Rationale 2026
Q&A | INSTANT DOWNLOAD PDF
1–20: Licensing, Rules, Permitting & General Requirements
1. Which Texas agency administers occupational licensing for OSSF installers?
A) Texas Commission on Environmental Quality
B) Texas Department of Agriculture
C) Texas Department of Licensing and Regulation
D) Texas Water Development Board
Correct Answer: Texas Commission on Environmental Quality
Rationale: TCEQ administers Texas OSSF occupational licensing, including Installer I and Installer II
licenses. The OSSF program is governed principally by Texas Health and Safety Code Chapter 366 and
30 TAC Chapter 285, while occupational licensing requirements are addressed in 30 TAC Chapter 30.
An installer must hold the appropriate license level to perform regulated installation work.
2. What is the principal distinction between Installer I and Installer II authority?
A) Installer I may design systems while Installer II only installs them
B) Installer II is authorized to install all types of OSSF systems
C) Installer I can install only aerobic systems
D) Installer II is limited to residential septic tanks
Correct Answer: Installer II is authorized to install all types of OSSF systems
Rationale: TCEQ specifically identifies Installer II as the license level authorized to install all types of
OSSF systems. Installer I is authorized for specified standard systems. Certain advanced, nonstandard,
proprietary, or specially designed systems therefore require Installer II authorization. The distinction is
important because the installer must possess the correct license for the system being constructed.
3. Which regulatory chapter contains Texas OSSF planning, construction, and installation
standards?
A) 30 TAC Chapter 30
B) Texas Health and Safety Code Chapter 366
C) 30 TAC Chapter 285
D) 16 TAC Chapter 76
Correct Answer: 30 TAC Chapter 285
Rationale: 30 TAC Chapter 285 contains the Texas rules specifically addressing On-Site Sewage
Facilities. It establishes standards for planning, construction, installation, permitting, operation, and
,related requirements. Chapter 30 addresses occupational licensing, while Health and Safety Code
Chapter 366 provides the underlying statutory authority for the state OSSF permitting program.
4. Before constructing an OSSF, what is generally required?
A) Only verbal permission from the property owner
B) A permit and approved planning materials
C) A wastewater operator license
D) A county tax certificate
Correct Answer: A permit and approved planning materials
Rationale: Texas OSSF work is regulated through permitting and approved planning materials. TCEQ
states that a person must hold a permit and approved plan to construct, alter, repair, extend, or
operate an OSSF. An installer should therefore verify authorization before beginning construction
rather than relying solely on the property owner's request or an informal site inspection.
5. An Installer II applicant upgrading from Installer I must generally have held the Installer I license
for at least:
A) Six months
B) One year
C) Two years
D) Three years
Correct Answer: One year
Rationale: TCEQ currently requires an applicant using the Installer I pathway to have held an OSSF
Installer I license for at least one year. The applicant must also provide qualifying documentation
demonstrating installation experience, such as the required sworn statements or other
documentation accepted by the executive director. This is separate from completing the required
Installer II training.
6. An apprentice seeking the Installer II license generally must have held the apprentice
registration for at least:
A) One year
B) Eighteen months
C) Two years
D) Four years
Correct Answer: Two years
Rationale: Under the current TCEQ requirements, an apprentice pursuing Installer II through the
apprentice pathway must have held the registration for at least two years. The applicant must also
document at least six qualifying installations through the prescribed sworn statement or other
documentation approved by the executive director. This pathway differs from the Installer I-to-II
pathway.
,7. How many qualifying installations must an Installer I applicant generally document when
upgrading to Installer II?
A) Three
B) Four
C) Five
D) Six
Correct Answer: Three
Rationale: TCEQ specifies documentation of at least three installations for the Installer I-to-II
pathway. The experience may be verified through the prescribed sworn statement from a designated
representative or qualifying customers, or through other documentation approved by the executive
director. This should not be confused with the six-installation requirement associated with the
apprentice-to-II pathway.
8. How many installations must an apprentice generally document for the apprentice-to-Installer II
pathway?
A) Two
B) Three
C) Four
D) Six
Correct Answer: Six
Rationale: TCEQ requires an apprentice applicant pursuing Installer II to document at least six
installations through the applicable supplemental form or other approved work-experience
documentation. The installations must be properly verified by an appropriate designated
representative or installer. This requirement demonstrates substantially broader practical experience
before the individual receives the broader Installer II authority.
9. Which training is required for a new Installer II applicant?
A) Installer I Basic Training only
B) Site Evaluator Basic Training
C) Installer II Basic Training
D) Maintenance Provider Advanced Training
Correct Answer: Installer II Basic Training
Rationale: TCEQ's current occupational training table identifies Installer II Basic Training, course code
418, as the required course for a new Installer II license. Site Evaluator and Maintenance Provider
courses are separate credentials with different requirements. Completing the correct approved course
is therefore an important licensing step.
10. What is the current application fee identified by TCEQ for an OSSF Installer II application?
, A) $55
B) $75
C) $111
D) $150
Correct Answer: $111
Rationale: TCEQ's current OSSF occupational licensing information identifies an application fee of
$111 for the Installer II license. Fees can change, so candidates should verify the amount before
submitting an application. The important exam-preparation distinction is that the licensing
application fee is separate from any testing-center fee associated with taking the computer-based
examination.
11. What is the normal validity period for Texas OSSF occupational licenses?
A) One year
B) Two years
C) Three years
D) Five years
Correct Answer: Three years
Rationale: TCEQ states that occupational licenses and registrations are valid for three years. Renewal
requirements vary according to the credential, and most OSSF licenses require continuing education.
Installers should monitor the expiration date rather than assuming the license remains valid
indefinitely after initial issuance.
12. How many continuing-education hours are generally required for renewal of an OSSF Installer II
license?
A) 8 hours
B) 12 hours
C) 18 hours
D) 24 hours
Correct Answer: 24 hours
Rationale: TCEQ states that all OSSF licenses except Apprentice and Maintenance Technician
registrations require 24 hours of continuing education for renewal. The hours must be obtained
before the license expires and through TCEQ-approved training. This requirement helps licensed
professionals remain familiar with applicable OSSF practices and regulatory requirements.
13. Which organization administers the OSSF Installer II licensing examination?
A) EPA
B) TCEQ
C) OSHA
D) Texas Department of Transportation
Correct Answers (Verified Answers) Plus Rationale 2026
Q&A | INSTANT DOWNLOAD PDF
1–20: Licensing, Rules, Permitting & General Requirements
1. Which Texas agency administers occupational licensing for OSSF installers?
A) Texas Commission on Environmental Quality
B) Texas Department of Agriculture
C) Texas Department of Licensing and Regulation
D) Texas Water Development Board
Correct Answer: Texas Commission on Environmental Quality
Rationale: TCEQ administers Texas OSSF occupational licensing, including Installer I and Installer II
licenses. The OSSF program is governed principally by Texas Health and Safety Code Chapter 366 and
30 TAC Chapter 285, while occupational licensing requirements are addressed in 30 TAC Chapter 30.
An installer must hold the appropriate license level to perform regulated installation work.
2. What is the principal distinction between Installer I and Installer II authority?
A) Installer I may design systems while Installer II only installs them
B) Installer II is authorized to install all types of OSSF systems
C) Installer I can install only aerobic systems
D) Installer II is limited to residential septic tanks
Correct Answer: Installer II is authorized to install all types of OSSF systems
Rationale: TCEQ specifically identifies Installer II as the license level authorized to install all types of
OSSF systems. Installer I is authorized for specified standard systems. Certain advanced, nonstandard,
proprietary, or specially designed systems therefore require Installer II authorization. The distinction is
important because the installer must possess the correct license for the system being constructed.
3. Which regulatory chapter contains Texas OSSF planning, construction, and installation
standards?
A) 30 TAC Chapter 30
B) Texas Health and Safety Code Chapter 366
C) 30 TAC Chapter 285
D) 16 TAC Chapter 76
Correct Answer: 30 TAC Chapter 285
Rationale: 30 TAC Chapter 285 contains the Texas rules specifically addressing On-Site Sewage
Facilities. It establishes standards for planning, construction, installation, permitting, operation, and
,related requirements. Chapter 30 addresses occupational licensing, while Health and Safety Code
Chapter 366 provides the underlying statutory authority for the state OSSF permitting program.
4. Before constructing an OSSF, what is generally required?
A) Only verbal permission from the property owner
B) A permit and approved planning materials
C) A wastewater operator license
D) A county tax certificate
Correct Answer: A permit and approved planning materials
Rationale: Texas OSSF work is regulated through permitting and approved planning materials. TCEQ
states that a person must hold a permit and approved plan to construct, alter, repair, extend, or
operate an OSSF. An installer should therefore verify authorization before beginning construction
rather than relying solely on the property owner's request or an informal site inspection.
5. An Installer II applicant upgrading from Installer I must generally have held the Installer I license
for at least:
A) Six months
B) One year
C) Two years
D) Three years
Correct Answer: One year
Rationale: TCEQ currently requires an applicant using the Installer I pathway to have held an OSSF
Installer I license for at least one year. The applicant must also provide qualifying documentation
demonstrating installation experience, such as the required sworn statements or other
documentation accepted by the executive director. This is separate from completing the required
Installer II training.
6. An apprentice seeking the Installer II license generally must have held the apprentice
registration for at least:
A) One year
B) Eighteen months
C) Two years
D) Four years
Correct Answer: Two years
Rationale: Under the current TCEQ requirements, an apprentice pursuing Installer II through the
apprentice pathway must have held the registration for at least two years. The applicant must also
document at least six qualifying installations through the prescribed sworn statement or other
documentation approved by the executive director. This pathway differs from the Installer I-to-II
pathway.
,7. How many qualifying installations must an Installer I applicant generally document when
upgrading to Installer II?
A) Three
B) Four
C) Five
D) Six
Correct Answer: Three
Rationale: TCEQ specifies documentation of at least three installations for the Installer I-to-II
pathway. The experience may be verified through the prescribed sworn statement from a designated
representative or qualifying customers, or through other documentation approved by the executive
director. This should not be confused with the six-installation requirement associated with the
apprentice-to-II pathway.
8. How many installations must an apprentice generally document for the apprentice-to-Installer II
pathway?
A) Two
B) Three
C) Four
D) Six
Correct Answer: Six
Rationale: TCEQ requires an apprentice applicant pursuing Installer II to document at least six
installations through the applicable supplemental form or other approved work-experience
documentation. The installations must be properly verified by an appropriate designated
representative or installer. This requirement demonstrates substantially broader practical experience
before the individual receives the broader Installer II authority.
9. Which training is required for a new Installer II applicant?
A) Installer I Basic Training only
B) Site Evaluator Basic Training
C) Installer II Basic Training
D) Maintenance Provider Advanced Training
Correct Answer: Installer II Basic Training
Rationale: TCEQ's current occupational training table identifies Installer II Basic Training, course code
418, as the required course for a new Installer II license. Site Evaluator and Maintenance Provider
courses are separate credentials with different requirements. Completing the correct approved course
is therefore an important licensing step.
10. What is the current application fee identified by TCEQ for an OSSF Installer II application?
, A) $55
B) $75
C) $111
D) $150
Correct Answer: $111
Rationale: TCEQ's current OSSF occupational licensing information identifies an application fee of
$111 for the Installer II license. Fees can change, so candidates should verify the amount before
submitting an application. The important exam-preparation distinction is that the licensing
application fee is separate from any testing-center fee associated with taking the computer-based
examination.
11. What is the normal validity period for Texas OSSF occupational licenses?
A) One year
B) Two years
C) Three years
D) Five years
Correct Answer: Three years
Rationale: TCEQ states that occupational licenses and registrations are valid for three years. Renewal
requirements vary according to the credential, and most OSSF licenses require continuing education.
Installers should monitor the expiration date rather than assuming the license remains valid
indefinitely after initial issuance.
12. How many continuing-education hours are generally required for renewal of an OSSF Installer II
license?
A) 8 hours
B) 12 hours
C) 18 hours
D) 24 hours
Correct Answer: 24 hours
Rationale: TCEQ states that all OSSF licenses except Apprentice and Maintenance Technician
registrations require 24 hours of continuing education for renewal. The hours must be obtained
before the license expires and through TCEQ-approved training. This requirement helps licensed
professionals remain familiar with applicable OSSF practices and regulatory requirements.
13. Which organization administers the OSSF Installer II licensing examination?
A) EPA
B) TCEQ
C) OSHA
D) Texas Department of Transportation
