Page 1 of 37
TCEQ CLASS C& D WATER LICENSE EXAM
|NEW UPDATES WITH VERIFIED
QS&As|ALREADY GRADED A+
Q1. Under TCEQ rules, what is the maximum allowable lead
content for "lead-free" pipes and fittings?
A) 0.2% lead
B) 0.25% lead
C) 0.5% lead
D) 0.25% weighted average lead
Answer: D
*Rationale: The Reduction of Lead in Drinking Water Act defines
lead-free as ≤0.25% weighted average for wetted surfaces.
Solder/flux ≤0.2%.*
Q2. A Tier 1 Public Notice for E. coli contamination must be
issued within how many hours?
,Page 2 of 37
A) 8 hours
B) 24 hours
C) 48 hours
D) 72 hours
Answer: B
Rationale: Tier 1 (acute health risk) requires notice within 24 hours
via radio, TV, or hand delivery.
Q3. The maximum contaminant level (MCL) for Total
Trihalomethanes (TTHMs) is:
A) 40 µg/L
B) 60 µg/L
C) 80 µg/L
D) 100 µg/L
Answer: C
*Rationale: EPA/TCEQ MCL for TTHMs is 0.080 mg/L (80 µg/L)
as a running annual average.*
,Page 3 of 37
Q4. Which of the following is a required component of an
OSHA Confined Space Entry permit?
A) List of all employee birthdays
B) Verification that all hazards are controlled
C) Approval from the mayor
D) Weather forecast
Answer: B
Rationale: The permit must verify atmospheric testing, isolation,
lockout/tagout, and rescue availability.
Q5. What is the minimum free chlorine residual required at the
far point of a distribution system under normal conditions?
A) 0.0 mg/L
B) 0.2 mg/L
C) 0.5 mg/L (TCEQ rules)
D) 2.0 mg/L
Answer: C
, Page 4 of 37
*Rationale: TCEQ rules (30 TAC 290) require a minimum of 0.5
mg/L free chlorine residual throughout the distribution system.*
Q6. A Tier 2 Public Notice is required for:
A) E. coli detection
B) Failure to submit a monitoring report on time
C) Violation of a treatment technique
D) Chronic MCL violation (less acute than Tier 1)
Answer: D
*Rationale: Tier 2 is for violations with potential health effects
but not imminent (e.g., long-term MCL exceedance). Must be
issued within 30 days.*
Q7. What is the minimum diameter for a main line fire
hydrant lead?
A) 4 inches
B) 6 inches
C) 8 inches
TCEQ CLASS C& D WATER LICENSE EXAM
|NEW UPDATES WITH VERIFIED
QS&As|ALREADY GRADED A+
Q1. Under TCEQ rules, what is the maximum allowable lead
content for "lead-free" pipes and fittings?
A) 0.2% lead
B) 0.25% lead
C) 0.5% lead
D) 0.25% weighted average lead
Answer: D
*Rationale: The Reduction of Lead in Drinking Water Act defines
lead-free as ≤0.25% weighted average for wetted surfaces.
Solder/flux ≤0.2%.*
Q2. A Tier 1 Public Notice for E. coli contamination must be
issued within how many hours?
,Page 2 of 37
A) 8 hours
B) 24 hours
C) 48 hours
D) 72 hours
Answer: B
Rationale: Tier 1 (acute health risk) requires notice within 24 hours
via radio, TV, or hand delivery.
Q3. The maximum contaminant level (MCL) for Total
Trihalomethanes (TTHMs) is:
A) 40 µg/L
B) 60 µg/L
C) 80 µg/L
D) 100 µg/L
Answer: C
*Rationale: EPA/TCEQ MCL for TTHMs is 0.080 mg/L (80 µg/L)
as a running annual average.*
,Page 3 of 37
Q4. Which of the following is a required component of an
OSHA Confined Space Entry permit?
A) List of all employee birthdays
B) Verification that all hazards are controlled
C) Approval from the mayor
D) Weather forecast
Answer: B
Rationale: The permit must verify atmospheric testing, isolation,
lockout/tagout, and rescue availability.
Q5. What is the minimum free chlorine residual required at the
far point of a distribution system under normal conditions?
A) 0.0 mg/L
B) 0.2 mg/L
C) 0.5 mg/L (TCEQ rules)
D) 2.0 mg/L
Answer: C
, Page 4 of 37
*Rationale: TCEQ rules (30 TAC 290) require a minimum of 0.5
mg/L free chlorine residual throughout the distribution system.*
Q6. A Tier 2 Public Notice is required for:
A) E. coli detection
B) Failure to submit a monitoring report on time
C) Violation of a treatment technique
D) Chronic MCL violation (less acute than Tier 1)
Answer: D
*Rationale: Tier 2 is for violations with potential health effects
but not imminent (e.g., long-term MCL exceedance). Must be
issued within 30 days.*
Q7. What is the minimum diameter for a main line fire
hydrant lead?
A) 4 inches
B) 6 inches
C) 8 inches
