1 | P a g e | © copyright 2024/2025 | Grade A+
Texas Class D Water Distribution
study guide Questions and Answers
(100% Pass)
What is the name of the State Agency responsible for enforcing the Safe
Drinking Water Act?
→ Texas Commission on Environmental Quality
what Minerals are associated with water hardness?
→ Calcium and magnesium
A public water system MUST at all times provide?
A. Adequate quantity of water
B. Adequate water pressure
c. Adequate disinfection
D. All of the above
→ D. All of the above
A Source of groundwater would be?
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
→ Aquifer
Fecal Coliform organisms sometimes found in water supplies are an indication
that?
A. The water Supply is Contaminated
B. Harmful Bacteria may be present
C. Possible pathogenic organisms are in the water
D. The water is unsuitable for drinking
E. All of the above
→ E. All of the above
A disease that may be spread by inadequately disinfected water is
→ Dysentery
A Common Chemical used in the disinfection of a small water Supply is
→ Calcium hypochlorite
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
A public water Supply system should maintain a system residual pressure of 20
psi and a minimum normal operating pressure of _____
→ 35 psi
The amount of chlorine in mg/L that is used by reacting with iron, organics or
bacteria is called
→ Demand
The MOST important treatment in water is
→ Disinfection
Which of the following would be considered part(s) of a hypo-chlorinator
system
→ Solution feed pump
According to state requirements all public water supply wells shall be
provided with a raised concrete sealing block screen vents and
→ Flow Measuring Device
Master01 | September, 2024/2025 | Latest update
Texas Class D Water Distribution
study guide Questions and Answers
(100% Pass)
What is the name of the State Agency responsible for enforcing the Safe
Drinking Water Act?
→ Texas Commission on Environmental Quality
what Minerals are associated with water hardness?
→ Calcium and magnesium
A public water system MUST at all times provide?
A. Adequate quantity of water
B. Adequate water pressure
c. Adequate disinfection
D. All of the above
→ D. All of the above
A Source of groundwater would be?
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
→ Aquifer
Fecal Coliform organisms sometimes found in water supplies are an indication
that?
A. The water Supply is Contaminated
B. Harmful Bacteria may be present
C. Possible pathogenic organisms are in the water
D. The water is unsuitable for drinking
E. All of the above
→ E. All of the above
A disease that may be spread by inadequately disinfected water is
→ Dysentery
A Common Chemical used in the disinfection of a small water Supply is
→ Calcium hypochlorite
Master01 | September, 2024/2025 | Latest update
, 1 | P a g e | © copyright 2024/2025 | Grade A+
A public water Supply system should maintain a system residual pressure of 20
psi and a minimum normal operating pressure of _____
→ 35 psi
The amount of chlorine in mg/L that is used by reacting with iron, organics or
bacteria is called
→ Demand
The MOST important treatment in water is
→ Disinfection
Which of the following would be considered part(s) of a hypo-chlorinator
system
→ Solution feed pump
According to state requirements all public water supply wells shall be
provided with a raised concrete sealing block screen vents and
→ Flow Measuring Device
Master01 | September, 2024/2025 | Latest update
