2025 TEXAS CLASS D WATER LICENSE (COMPLETE) QUESTIONS AND
ANSWERS!!
Question 1
Ground storage at a surface water treatment receiving the treated water is called the:
A) clear well
B) standpipe
C) pressure tank
D) filter basin
E) equalization tank
Correct Answer: A) clear well
Rationale: Ground storage at a surface water treatment receiving the treated water is called
the clear well.
Question 2
The TCEQ requires all storage tanks to have screened vents, locked hatches, a dust-proof cover,
overflows with hinged flaps, and:
A) ladders
B) handrails
C) lighting
D) entry ports
E) safety barriers
Correct Answer: D) entry ports
Rationale: The TCEQ requires all storage tanks to have screened vents, locked hatches, a
dust-proof cover, overflows with hinged flaps, and entry ports.
Question 3
Total storage capacity (elevated storage included) must be how many gallons per connection as
per state standards?
A) 50 gallons
B) 100 gallons
C) 200 gallons
D) 300 gallons
E) 500 gallons
,Correct Answer: C) 200
Rationale: Total storage capacity (elevated storage included) must be 200 gallons per
connection.
Question 4
Storage tanks must be painted, disinfected, and maintained according to what standards?
A) TCEQ
B) EPA
C) AWWA
D) OSHA
E) NSF
Correct Answer: C) AWWA
Rationale: Storage tanks must be painted, disinfected, and maintained according to AWWA
standards.
Question 5
Coatings on storage tanks for contact with potable water must be approved by NSF (National
Sanitation Foundation), FDA (Food and Drug Administration), or:
A) OSHA
B) TCEQ
C) AWWA
,D) EPA
E) DOT
Correct Answer: D) EPA
Rationale: Coatings on storage tanks for contact with potable water must be approved by
EPA
.
Question 6
Each foot of a water column produces how much psi?
A) 1.000psi
B) 0.500psi
C)0.433psi
D) 0.231psi
E) 0.350psi
Correct Answer: C) 0.433
Rationale: Each foot of a water column produces 0.433psi
.
, Question 7
What is the state minimum normal operating pressure for a public water distribution system?
A) 20psi
B) 25psi
C) 30psi
D) 35psi
E) 40psi
Correct Answer: D) 35 psi
Rationale: The state minimum normal operating pressure is 35psi
.
Question 8
Elevated storage is water stored at least how many feet above the highest service connection to
be effective for maintaining pressure?
A) 50
B) 60
C) 70
D) 80
E) 100
ANSWERS!!
Question 1
Ground storage at a surface water treatment receiving the treated water is called the:
A) clear well
B) standpipe
C) pressure tank
D) filter basin
E) equalization tank
Correct Answer: A) clear well
Rationale: Ground storage at a surface water treatment receiving the treated water is called
the clear well.
Question 2
The TCEQ requires all storage tanks to have screened vents, locked hatches, a dust-proof cover,
overflows with hinged flaps, and:
A) ladders
B) handrails
C) lighting
D) entry ports
E) safety barriers
Correct Answer: D) entry ports
Rationale: The TCEQ requires all storage tanks to have screened vents, locked hatches, a
dust-proof cover, overflows with hinged flaps, and entry ports.
Question 3
Total storage capacity (elevated storage included) must be how many gallons per connection as
per state standards?
A) 50 gallons
B) 100 gallons
C) 200 gallons
D) 300 gallons
E) 500 gallons
,Correct Answer: C) 200
Rationale: Total storage capacity (elevated storage included) must be 200 gallons per
connection.
Question 4
Storage tanks must be painted, disinfected, and maintained according to what standards?
A) TCEQ
B) EPA
C) AWWA
D) OSHA
E) NSF
Correct Answer: C) AWWA
Rationale: Storage tanks must be painted, disinfected, and maintained according to AWWA
standards.
Question 5
Coatings on storage tanks for contact with potable water must be approved by NSF (National
Sanitation Foundation), FDA (Food and Drug Administration), or:
A) OSHA
B) TCEQ
C) AWWA
,D) EPA
E) DOT
Correct Answer: D) EPA
Rationale: Coatings on storage tanks for contact with potable water must be approved by
EPA
.
Question 6
Each foot of a water column produces how much psi?
A) 1.000psi
B) 0.500psi
C)0.433psi
D) 0.231psi
E) 0.350psi
Correct Answer: C) 0.433
Rationale: Each foot of a water column produces 0.433psi
.
, Question 7
What is the state minimum normal operating pressure for a public water distribution system?
A) 20psi
B) 25psi
C) 30psi
D) 35psi
E) 40psi
Correct Answer: D) 35 psi
Rationale: The state minimum normal operating pressure is 35psi
.
Question 8
Elevated storage is water stored at least how many feet above the highest service connection to
be effective for maintaining pressure?
A) 50
B) 60
C) 70
D) 80
E) 100
