TCEQ Class D Water Operator License
Exam Questions with 100% Correct Answers
1. . Elevated storage tanks primarily help provide:
A. Extra chlorination time
B. Gravity pressure and emergency storage
C. Water softening
D. Filtration
Answer B>>
Rationale: Gravity feed from elevated tanks maintains pressure when
pumps are off.
2. Iron and manganese problems in groundwater are best controlled by:
A. Adding more chlorine only
B. Oxidation followed by filtration
C. Adding fluoride
D. Lowering pH
Answer B>>
,Rationale: Oxidation converts dissolved iron/manganese to forms that
can be filtered out.
3. The main goal of a water operator is to:
A. Provide safe drinking water in adequate quantity at adequate
pressure
B. Keep water bills as low as possible
C. Make the water as soft as possible
D. Use the least amount of electricity
Answer A
Rationale: This is the core public health responsibility of every licensed
operator.
4. The primary state regulator of public water systems in Texas is the:
A. EPA
B. TCEQ
C. Texas Department of Health
D. Local city council
Answer B>> TCEQ
,Rationale: The Texas Commission on Environmental Quality (TCEQ)
enforces drinking water standards under the Safe Drinking Water Act
(primacy from EPA).
5. The federal agency responsible for setting national drinking water
standards is the:
A. TCEQ
B. EPA
C. OSHA
D. CDC
Answer B>> EPA
Rationale: The EPA sets the Safe Drinking Water Act standards; states
like Texas implement and enforce them via primacy.
6. An alkaline or basic solution has a pH:
A. Less than 7
B. Equal to 7
C. Greater than 7
D. Greater than 14
Answer C>> Greater than 7
, Rationale: pH affects corrosion, disinfection efficiency, and taste. Texas
recommends slightly above 7 for non-corrosive water.
7. Pathogens are:
A. Disease-causing microorganisms
B. Chemicals that cause hardness
C. Suspended particles
D. Dissolved gases
Answer A
Rationale: Operators focus on destroying or removing pathogens
(bacteria, viruses, protozoa) through treatment and disinfection to
prevent waterborne disease.
8. When chlorine gas is used, a full-face self-contained breathing
apparatus (SCBA) must be readily accessible:
A. In the office
B. Outside the chlorinator room
C. Inside the chlorinator room
D. In the vehicle
Answer B>>
Exam Questions with 100% Correct Answers
1. . Elevated storage tanks primarily help provide:
A. Extra chlorination time
B. Gravity pressure and emergency storage
C. Water softening
D. Filtration
Answer B>>
Rationale: Gravity feed from elevated tanks maintains pressure when
pumps are off.
2. Iron and manganese problems in groundwater are best controlled by:
A. Adding more chlorine only
B. Oxidation followed by filtration
C. Adding fluoride
D. Lowering pH
Answer B>>
,Rationale: Oxidation converts dissolved iron/manganese to forms that
can be filtered out.
3. The main goal of a water operator is to:
A. Provide safe drinking water in adequate quantity at adequate
pressure
B. Keep water bills as low as possible
C. Make the water as soft as possible
D. Use the least amount of electricity
Answer A
Rationale: This is the core public health responsibility of every licensed
operator.
4. The primary state regulator of public water systems in Texas is the:
A. EPA
B. TCEQ
C. Texas Department of Health
D. Local city council
Answer B>> TCEQ
,Rationale: The Texas Commission on Environmental Quality (TCEQ)
enforces drinking water standards under the Safe Drinking Water Act
(primacy from EPA).
5. The federal agency responsible for setting national drinking water
standards is the:
A. TCEQ
B. EPA
C. OSHA
D. CDC
Answer B>> EPA
Rationale: The EPA sets the Safe Drinking Water Act standards; states
like Texas implement and enforce them via primacy.
6. An alkaline or basic solution has a pH:
A. Less than 7
B. Equal to 7
C. Greater than 7
D. Greater than 14
Answer C>> Greater than 7
, Rationale: pH affects corrosion, disinfection efficiency, and taste. Texas
recommends slightly above 7 for non-corrosive water.
7. Pathogens are:
A. Disease-causing microorganisms
B. Chemicals that cause hardness
C. Suspended particles
D. Dissolved gases
Answer A
Rationale: Operators focus on destroying or removing pathogens
(bacteria, viruses, protozoa) through treatment and disinfection to
prevent waterborne disease.
8. When chlorine gas is used, a full-face self-contained breathing
apparatus (SCBA) must be readily accessible:
A. In the office
B. Outside the chlorinator room
C. Inside the chlorinator room
D. In the vehicle
Answer B>>
