Page 1 of 105
Texas Well Driller License Exam ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS LATEST UPDATE THIS
YEAR
SUMMARIZED EXAM COVERAGE
The exam focuses on safe, legal, and technically sound groundwater well construction and
management, including:
• Texas laws and licensing rules
• Proper well design, drilling, and completion
• Groundwater science and aquifer behavior
• Equipment operation and drilling methods
• Pump systems and installation
• Water quality protection
• Safety practices on drilling sites
• Calculations related to well construction
• Proper well abandonment procedures
, Page 2 of 105
✅ MCQs (Batch 1: 50 Questions
1.
A driller begins constructing a water well without obtaining required permits from the local
groundwater district. What is the most likely consequence?
A. No consequence if the well is shallow
B. Immediate license upgrade
C. Violation subject to penalties and possible license suspension
D. Only a verbal warning
Answer: C
Rationale: Texas regulations require permits before drilling; violations can result in fines or suspension.
2.
During drilling, a contractor encounters a confined aquifer under pressure. What is the most appropriate
precaution?
, Page 3 of 105
A. Ignore pressure and continue drilling
B. Install proper casing and control flow immediately
C. Increase drilling speed
D. Remove drilling mud
Answer: B
Rationale: Confined aquifers can cause uncontrolled flow; proper casing ensures safety and control.
3.
A well driller selects a screen slot size that is too large for the formation. What is the most likely result?
A. Increased pump efficiency
B. Reduced water yield
C. Sand infiltration into the well
D. Faster drilling time
Answer: C
Rationale: Oversized slots allow formation particles to enter, causing sand pumping.
4.
, Page 4 of 105
A drilling crew fails to disinfect a newly constructed well before use. What risk does this create?
A. Structural collapse
B. Electrical hazard
C. Biological contamination of water supply
D. Reduced water pressure
Answer: C
Rationale: Disinfection removes bacteria introduced during drilling.
5.
While calculating annular volume, a driller miscalculates the borehole diameter. What is the likely
consequence?
A. Overuse or underuse of sealing materials
B. Faster drilling progress
C. Reduced labor cost
D. Increased pump efficiency
Answer: A
Rationale: Incorrect volume leads to improper sealing, risking contamination.
Texas Well Driller License Exam ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS LATEST UPDATE THIS
YEAR
SUMMARIZED EXAM COVERAGE
The exam focuses on safe, legal, and technically sound groundwater well construction and
management, including:
• Texas laws and licensing rules
• Proper well design, drilling, and completion
• Groundwater science and aquifer behavior
• Equipment operation and drilling methods
• Pump systems and installation
• Water quality protection
• Safety practices on drilling sites
• Calculations related to well construction
• Proper well abandonment procedures
, Page 2 of 105
✅ MCQs (Batch 1: 50 Questions
1.
A driller begins constructing a water well without obtaining required permits from the local
groundwater district. What is the most likely consequence?
A. No consequence if the well is shallow
B. Immediate license upgrade
C. Violation subject to penalties and possible license suspension
D. Only a verbal warning
Answer: C
Rationale: Texas regulations require permits before drilling; violations can result in fines or suspension.
2.
During drilling, a contractor encounters a confined aquifer under pressure. What is the most appropriate
precaution?
, Page 3 of 105
A. Ignore pressure and continue drilling
B. Install proper casing and control flow immediately
C. Increase drilling speed
D. Remove drilling mud
Answer: B
Rationale: Confined aquifers can cause uncontrolled flow; proper casing ensures safety and control.
3.
A well driller selects a screen slot size that is too large for the formation. What is the most likely result?
A. Increased pump efficiency
B. Reduced water yield
C. Sand infiltration into the well
D. Faster drilling time
Answer: C
Rationale: Oversized slots allow formation particles to enter, causing sand pumping.
4.
, Page 4 of 105
A drilling crew fails to disinfect a newly constructed well before use. What risk does this create?
A. Structural collapse
B. Electrical hazard
C. Biological contamination of water supply
D. Reduced water pressure
Answer: C
Rationale: Disinfection removes bacteria introduced during drilling.
5.
While calculating annular volume, a driller miscalculates the borehole diameter. What is the likely
consequence?
A. Overuse or underuse of sealing materials
B. Faster drilling progress
C. Reduced labor cost
D. Increased pump efficiency
Answer: A
Rationale: Incorrect volume leads to improper sealing, risking contamination.
