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TEXAS WATER WELL DRILLER LICENSE PRACTICE EXAM TEXAS
DEPARTMENT OF LICENSING AND REGULATION (TDLR) ACADEMIC
YEAR 2026-2027 FULL PACKAGE QUESTIONS ANSWERS AND
RATIONALES LATEST UPDATED VERSION
INSTANT DOWNLOAD PDF..!!
INTRODUCTION
The Texas Water Well Driller License Examination is the official
credentialing assessment administered by the Texas Department of
Licensing and Regulation (TDLR) for individuals seeking to drill,
construct, repair, or plug water wells throughout the State of Texas .
This license is mandatory for anyone performing water well drilling
work in Texas, with the exception of a landowner drilling a well for
personal use on their own property . The examination process
includes endorsement-specific written exams testing knowledge of 16
Texas Administrative Code Chapter 76, with a minimum passing score
of 70 percent required . Texas employs a tiered endorsement system:
Water Wells (W) requires 15 qualifying drillings, Monitor Wells (M)
requires 50, Injection Wells (N) requires 50, Dewatering Wells (D)
requires 50, Closed Loop Geothermal Wells (C) requires 50, and
Master License (A) requires all endorsements . Applicants must have
at least two years of experience under a licensed driller, be at least
18 years old, and complete continuing education for renewal . This
comprehensive question bank delivers 200 advanced, scenario-based
questions modeled on the official TDLR exam domains, including
licensing requirements, Regulation 76 compliance, well construction
standards, setback distances, grouting procedures, and safety
protocols. Each question includes a detailed rationale explaining why
the correct answer is right and analyzing why each distractor fails. By
mastering this bank, you will develop the regulatory and technical
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knowledge required to pass on your first attempt and to drill water
wells safely and legally in Texas.
CORE DOMAINS TESTED
1. Licensing and Regulatory Framework – TDLR jurisdiction,
application requirements, experience, fees, renewal, and
continuing education .
2. Texas Administrative Code Chapter 76 – Scope, definitions,
technical standards, and enforcement provisions .
3. Well Construction Standards – Casing materials, minimum
diameter, casing thickness, annular space, and grouting
procedures .
4. Setback Requirements – Distances from septic systems,
property lines, surface water, and other features .
5. Drilling Methods and Equipment – Rotary drilling, cable tool,
auger drilling, and drilling fluids .
6. Groundwater Principles – Aquifer types, hydrogeology,
drawdown, and Darcy's Law .
7. Well Completion and Development – Well development,
disinfection, sanitary seals, and caps .
8. Well Abandonment and Plugging – Full-depth sealing, plugging
reports, and materials .
9. Reporting and Recordkeeping – Well Construction Report,
Notice of Intent, and deadlines .
10. Safety and Water Quality Protection – Confined space,
hydrogen sulfide, contamination prevention, and disinfection .
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QUESTIONS 1-200
Q1: Which Texas agency is primarily responsible for licensing water
well drillers and pump installers?
A) Texas Commission on Environmental Quality (TCEQ)
B) Texas Department of Licensing and Regulation (TDLR)
C) Texas Water Development Board (TWDB)
D) Railroad Commission of Texas
Rationale: The correct answer is B. TDLR administers the Well Driller
Licensing Program under Texas Occupations Code Chapters 1901 and
1902 and 16 Texas Administrative Code Chapter 76 . Option A is
incorrect because TCEQ oversees water quality and public water
supply well construction, not private well driller licensing . Option C is
incorrect because TWDB manages water resources data and well
records, not licensing . Option D is incorrect because the Railroad
Commission regulates oil and gas wells, not water wells .
Q2: What is the minimum age requirement for a Texas Water Well
Driller license?
A) 18 years
B) 21 years
C) 25 years
D) No age requirement
Rationale: The correct answer is A. Texas Occupations Code
§1902.102 requires applicants to be at least 18 years of age . Option
B is incorrect because 21 is not the minimum age. Option C is
incorrect because 25 exceeds the minimum. Option D is incorrect
because there is an age requirement.
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Q3: What is the minimum experience required to apply for a Water
Well Driller license in Texas?
A) 1 year of relevant experience
B) 2 years of relevant experience under a licensed driller
C) 3 years of relevant experience
D) 5 years of relevant experience
Rationale: The correct answer is B. Applicants must have a minimum
of two years of experience under the supervision of a licensed Well
Driller or Pump Installer . Option A is incorrect because 1 year is
insufficient. Option C is incorrect because 3 years exceeds the
minimum. Option D is incorrect because 5 years exceeds the
minimum.
Q4: What is the passing score for the Texas Water Well Driller
License Exam?
A) 60%
B) 65%
C) 70%
D) 75%
Rationale: The correct answer is C. Texas Administrative Code
§76.23(c) specifies that a passing grade is 70% . Option A is incorrect
because 60% is below the passing threshold. Option B is incorrect
because 65% is below the threshold. Option D is incorrect because
75% exceeds the required minimum.
Q5: How long is a Texas Water Well Driller license valid before
renewal?
A) 1 year
B) 2 years
TEXAS WATER WELL DRILLER LICENSE PRACTICE EXAM TEXAS
DEPARTMENT OF LICENSING AND REGULATION (TDLR) ACADEMIC
YEAR 2026-2027 FULL PACKAGE QUESTIONS ANSWERS AND
RATIONALES LATEST UPDATED VERSION
INSTANT DOWNLOAD PDF..!!
INTRODUCTION
The Texas Water Well Driller License Examination is the official
credentialing assessment administered by the Texas Department of
Licensing and Regulation (TDLR) for individuals seeking to drill,
construct, repair, or plug water wells throughout the State of Texas .
This license is mandatory for anyone performing water well drilling
work in Texas, with the exception of a landowner drilling a well for
personal use on their own property . The examination process
includes endorsement-specific written exams testing knowledge of 16
Texas Administrative Code Chapter 76, with a minimum passing score
of 70 percent required . Texas employs a tiered endorsement system:
Water Wells (W) requires 15 qualifying drillings, Monitor Wells (M)
requires 50, Injection Wells (N) requires 50, Dewatering Wells (D)
requires 50, Closed Loop Geothermal Wells (C) requires 50, and
Master License (A) requires all endorsements . Applicants must have
at least two years of experience under a licensed driller, be at least
18 years old, and complete continuing education for renewal . This
comprehensive question bank delivers 200 advanced, scenario-based
questions modeled on the official TDLR exam domains, including
licensing requirements, Regulation 76 compliance, well construction
standards, setback distances, grouting procedures, and safety
protocols. Each question includes a detailed rationale explaining why
the correct answer is right and analyzing why each distractor fails. By
mastering this bank, you will develop the regulatory and technical
,2
knowledge required to pass on your first attempt and to drill water
wells safely and legally in Texas.
CORE DOMAINS TESTED
1. Licensing and Regulatory Framework – TDLR jurisdiction,
application requirements, experience, fees, renewal, and
continuing education .
2. Texas Administrative Code Chapter 76 – Scope, definitions,
technical standards, and enforcement provisions .
3. Well Construction Standards – Casing materials, minimum
diameter, casing thickness, annular space, and grouting
procedures .
4. Setback Requirements – Distances from septic systems,
property lines, surface water, and other features .
5. Drilling Methods and Equipment – Rotary drilling, cable tool,
auger drilling, and drilling fluids .
6. Groundwater Principles – Aquifer types, hydrogeology,
drawdown, and Darcy's Law .
7. Well Completion and Development – Well development,
disinfection, sanitary seals, and caps .
8. Well Abandonment and Plugging – Full-depth sealing, plugging
reports, and materials .
9. Reporting and Recordkeeping – Well Construction Report,
Notice of Intent, and deadlines .
10. Safety and Water Quality Protection – Confined space,
hydrogen sulfide, contamination prevention, and disinfection .
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QUESTIONS 1-200
Q1: Which Texas agency is primarily responsible for licensing water
well drillers and pump installers?
A) Texas Commission on Environmental Quality (TCEQ)
B) Texas Department of Licensing and Regulation (TDLR)
C) Texas Water Development Board (TWDB)
D) Railroad Commission of Texas
Rationale: The correct answer is B. TDLR administers the Well Driller
Licensing Program under Texas Occupations Code Chapters 1901 and
1902 and 16 Texas Administrative Code Chapter 76 . Option A is
incorrect because TCEQ oversees water quality and public water
supply well construction, not private well driller licensing . Option C is
incorrect because TWDB manages water resources data and well
records, not licensing . Option D is incorrect because the Railroad
Commission regulates oil and gas wells, not water wells .
Q2: What is the minimum age requirement for a Texas Water Well
Driller license?
A) 18 years
B) 21 years
C) 25 years
D) No age requirement
Rationale: The correct answer is A. Texas Occupations Code
§1902.102 requires applicants to be at least 18 years of age . Option
B is incorrect because 21 is not the minimum age. Option C is
incorrect because 25 exceeds the minimum. Option D is incorrect
because there is an age requirement.
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Q3: What is the minimum experience required to apply for a Water
Well Driller license in Texas?
A) 1 year of relevant experience
B) 2 years of relevant experience under a licensed driller
C) 3 years of relevant experience
D) 5 years of relevant experience
Rationale: The correct answer is B. Applicants must have a minimum
of two years of experience under the supervision of a licensed Well
Driller or Pump Installer . Option A is incorrect because 1 year is
insufficient. Option C is incorrect because 3 years exceeds the
minimum. Option D is incorrect because 5 years exceeds the
minimum.
Q4: What is the passing score for the Texas Water Well Driller
License Exam?
A) 60%
B) 65%
C) 70%
D) 75%
Rationale: The correct answer is C. Texas Administrative Code
§76.23(c) specifies that a passing grade is 70% . Option A is incorrect
because 60% is below the passing threshold. Option B is incorrect
because 65% is below the threshold. Option D is incorrect because
75% exceeds the required minimum.
Q5: How long is a Texas Water Well Driller license valid before
renewal?
A) 1 year
B) 2 years
