TEXAS CLASS C SURFACE WATER EXAM
REVIEW QUESTIONS AND VERIFIED ANSWERS
100% CORRECT GRADE A (2026/2027)
10 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Demonstrate mastery of surface water treatment principles including coagulation, flocculation,
sedimentation, filtration, and disinfection
2 Apply TCEQ regulations and Texas Water Code to operational scenarios, including sampling, reporting,
and compliance calculations
3 Analyze distribution system hydraulics, troubleshoot water quality issues, and implement safety and
emergency procedures
4 Texas Class C Surface Water Exam Review Questions and Verified Answers 100% Correct Grade A
5 2026
6 2027
7 Foundations of Water Treatment and Distribution Operations
8 Applied Water Treatment and Distribution Operations
9 Advanced Water Treatment and Distribution Operations
10 Water Treatment and Distribution Operations Review
ABSTRACT
This study document brings together 10 carefully worded exam questions drawn from Texas Class
C Surface Water Exam Review Questions and Verified Answers 100% Correct Grade A
(2026/2027), with the strongest emphasis placed on Demonstrate mastery of surface water
treatment principles including coagulation, flocculation, sedimentation, filtration, and disinfection,
Apply TCEQ regulations and Texas Water Code to operational scenarios, including sampling,
reporting, and compliance calculations, Analyze distribution system hydraulics, troubleshoot water
quality issues and and implement safety and emergency procedures. Every item follows the
wording style and level of reasoning you meet in the real paper, and each one is paired with a clear
rationale so the correct choice is never a guess. Work through the set at your own pace, mark the
questions that slow you down, then come back to them until the reasoning feels automatic.
Learners who revise this way walk into the exam room recognising the pattern behind the
questions instead of meeting them for the first time. Keep going - steady, honest practice is what
turns a difficult paper into a comfortable pass.
Page 1
, Q1 DEMONSTRATE MASTERY OF SURFACE WATER TREATMENT PRINCIPLES INCLUDING
COAGULATION, FLOCCULATION, SEDIMENTATION, FILTRATION, AND DISINFECTION
A surface water treatment plant uses alum coagulation at pH 6.5. The raw water
alkalinity is 40 mg/L as CaCO3. After adding 25 mg/L of alum, what is the
approximate theoretical alkalinity consumption and the resulting pH effect?
A. Alkalinity consumed = 13.5 mg/L, pH will decrease slightly. CORRECT
B. Alkalinity consumed = 25 mg/L, pH will increase slightly.
C. Alkalinity consumed = 13.5 mg/L, pH will increase significantly.
D. Alkalinity consumed = 25 mg/L, pH will decrease significantly.
RATIONALE: Alum (Al2(SO4)3-14H2O) consumes alkalinity at a rate of approximately 0.54 mg/L
as CaCO3 per mg/L of alum. For 25 mg/L alum, consumption = 25 × 0.54 13.5 mg/L. This
consumption reduces alkalinity and lowers pH, though the effect is slight because 13.5 mg/L is
less than the initial 40 mg/L. Options B and D incorrectly state 25 mg/L consumption; option C
incorrectly states pH increases.
Q2 APPLY TCEQ REGULATIONS AND TEXAS WATER CODE TO OPERATIONAL SCENARIOS,
INCLUDING SAMPLING, REPORTING, AND COMPLIANCE CALCULATIONS
In a distribution system, a pressure gauge reads 65 psi at a point where the
elevation is 150 ft above the treatment plant. What is the pressure head in feet at
this location?
A. 150 ft CORRECT
B. 65 ft
C. 150 psi
D. 65 psi
RATIONALE: Pressure head in feet is calculated as psi × 2.31. 65 psi × 2.31 = 150.15 ft, which
rounds to 150 ft. The elevation is irrelevant to converting pressure to head. Option B is the
pressure in psi, not feet. Option C mistakenly uses psi as feet. Option D is the original pressure
reading.
Page 2
REVIEW QUESTIONS AND VERIFIED ANSWERS
100% CORRECT GRADE A (2026/2027)
10 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Demonstrate mastery of surface water treatment principles including coagulation, flocculation,
sedimentation, filtration, and disinfection
2 Apply TCEQ regulations and Texas Water Code to operational scenarios, including sampling, reporting,
and compliance calculations
3 Analyze distribution system hydraulics, troubleshoot water quality issues, and implement safety and
emergency procedures
4 Texas Class C Surface Water Exam Review Questions and Verified Answers 100% Correct Grade A
5 2026
6 2027
7 Foundations of Water Treatment and Distribution Operations
8 Applied Water Treatment and Distribution Operations
9 Advanced Water Treatment and Distribution Operations
10 Water Treatment and Distribution Operations Review
ABSTRACT
This study document brings together 10 carefully worded exam questions drawn from Texas Class
C Surface Water Exam Review Questions and Verified Answers 100% Correct Grade A
(2026/2027), with the strongest emphasis placed on Demonstrate mastery of surface water
treatment principles including coagulation, flocculation, sedimentation, filtration, and disinfection,
Apply TCEQ regulations and Texas Water Code to operational scenarios, including sampling,
reporting, and compliance calculations, Analyze distribution system hydraulics, troubleshoot water
quality issues and and implement safety and emergency procedures. Every item follows the
wording style and level of reasoning you meet in the real paper, and each one is paired with a clear
rationale so the correct choice is never a guess. Work through the set at your own pace, mark the
questions that slow you down, then come back to them until the reasoning feels automatic.
Learners who revise this way walk into the exam room recognising the pattern behind the
questions instead of meeting them for the first time. Keep going - steady, honest practice is what
turns a difficult paper into a comfortable pass.
Page 1
, Q1 DEMONSTRATE MASTERY OF SURFACE WATER TREATMENT PRINCIPLES INCLUDING
COAGULATION, FLOCCULATION, SEDIMENTATION, FILTRATION, AND DISINFECTION
A surface water treatment plant uses alum coagulation at pH 6.5. The raw water
alkalinity is 40 mg/L as CaCO3. After adding 25 mg/L of alum, what is the
approximate theoretical alkalinity consumption and the resulting pH effect?
A. Alkalinity consumed = 13.5 mg/L, pH will decrease slightly. CORRECT
B. Alkalinity consumed = 25 mg/L, pH will increase slightly.
C. Alkalinity consumed = 13.5 mg/L, pH will increase significantly.
D. Alkalinity consumed = 25 mg/L, pH will decrease significantly.
RATIONALE: Alum (Al2(SO4)3-14H2O) consumes alkalinity at a rate of approximately 0.54 mg/L
as CaCO3 per mg/L of alum. For 25 mg/L alum, consumption = 25 × 0.54 13.5 mg/L. This
consumption reduces alkalinity and lowers pH, though the effect is slight because 13.5 mg/L is
less than the initial 40 mg/L. Options B and D incorrectly state 25 mg/L consumption; option C
incorrectly states pH increases.
Q2 APPLY TCEQ REGULATIONS AND TEXAS WATER CODE TO OPERATIONAL SCENARIOS,
INCLUDING SAMPLING, REPORTING, AND COMPLIANCE CALCULATIONS
In a distribution system, a pressure gauge reads 65 psi at a point where the
elevation is 150 ft above the treatment plant. What is the pressure head in feet at
this location?
A. 150 ft CORRECT
B. 65 ft
C. 150 psi
D. 65 psi
RATIONALE: Pressure head in feet is calculated as psi × 2.31. 65 psi × 2.31 = 150.15 ft, which
rounds to 150 ft. The elevation is irrelevant to converting pressure to head. Option B is the
pressure in psi, not feet. Option C mistakenly uses psi as feet. Option D is the original pressure
reading.
Page 2
