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Texas Class D Water License Questions and
Correct Answers
Ground storage at a surface water treatment receiving the treated
water is called the? Ans: — clear well
The TCEQ requires all storage tanks to have screened vents, licked
hatches, a dust-proof cover, overflows with hinged flaps, and Ans:
— entry ports
Total storage capacity (elevated storage included) must be how
many gallons? Ans: — 200
Storage tanks must be painted, disinfected, and maintained
according to what standards? Ans: — AWWA
Coatings on storage tanks for contact with potable water must be
approved by? Ans: — EPA
Each foot of a water column produces how much psi? Ans: —
0.433
What is the state minimum normal operating pressure? Ans: — 35
psi
Elevated storage is water stored at least how many feet above the
highest service connection? Ans: — 80
A ? is a tank resting on the ground that is greater in height than
diameter? Ans: — standpipe
What kind of tank also known as (hydropneumatic tanks) are
cylindrical and horizontal to the ground. Ans: — pressure tanks
Annual inspections on tanks must be inspected how often? Ans: —
yearly
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Cathodic protection is an ? method for preventing corrosion of the
interior of metal tanks? Ans: — electrochemical
The TCEQ requires distribution system pressure to never fall
below ? psi. Ans: — 20
Under normal operating conditions, the distribution pressure must
be at least ? psi. Ans: — 35
Storage facilities ? demand on the water supply? Ans: — equalize
Storage allows uniform pump rates, supplies water for fire
fighting, and provides time for ? Ans: — disenfection
Ground storage at a surface water treatment plant is called a ?
Ans: — clear well
The TCEQ requires storage tanks to have covered vents, locked
hatches, a dust-proof cover, overflows with hinged flaps, and ?
Ans: — entry ports
If a 30-inch diameter access opening is not provided in a storage
tank, the primary roof access must not be less than ? inches. Ans:
— 30
No paint, coating, or wax containing ? is allowed. Ans: — lead
Coatings for contact with potable water must be approved by ? ,
the National Sanitation Foundation, or the Food and Drug
Administration. Ans: — EPA
An elevated storage tank is usually ? supported above ground on a
tower. Ans: — steel
Pressure from an elevated tank is maintained by the ? of the water
column. Ans: — height
A ? is a tank resting on the ground that is greater in height than
diameter. Ans: — standpipe
© 2025 All rights reserved
Texas Class D Water License Questions and
Correct Answers
Ground storage at a surface water treatment receiving the treated
water is called the? Ans: — clear well
The TCEQ requires all storage tanks to have screened vents, licked
hatches, a dust-proof cover, overflows with hinged flaps, and Ans:
— entry ports
Total storage capacity (elevated storage included) must be how
many gallons? Ans: — 200
Storage tanks must be painted, disinfected, and maintained
according to what standards? Ans: — AWWA
Coatings on storage tanks for contact with potable water must be
approved by? Ans: — EPA
Each foot of a water column produces how much psi? Ans: —
0.433
What is the state minimum normal operating pressure? Ans: — 35
psi
Elevated storage is water stored at least how many feet above the
highest service connection? Ans: — 80
A ? is a tank resting on the ground that is greater in height than
diameter? Ans: — standpipe
What kind of tank also known as (hydropneumatic tanks) are
cylindrical and horizontal to the ground. Ans: — pressure tanks
Annual inspections on tanks must be inspected how often? Ans: —
yearly
© 2025 All rights reserved
, 2 | Page
Cathodic protection is an ? method for preventing corrosion of the
interior of metal tanks? Ans: — electrochemical
The TCEQ requires distribution system pressure to never fall
below ? psi. Ans: — 20
Under normal operating conditions, the distribution pressure must
be at least ? psi. Ans: — 35
Storage facilities ? demand on the water supply? Ans: — equalize
Storage allows uniform pump rates, supplies water for fire
fighting, and provides time for ? Ans: — disenfection
Ground storage at a surface water treatment plant is called a ?
Ans: — clear well
The TCEQ requires storage tanks to have covered vents, locked
hatches, a dust-proof cover, overflows with hinged flaps, and ?
Ans: — entry ports
If a 30-inch diameter access opening is not provided in a storage
tank, the primary roof access must not be less than ? inches. Ans:
— 30
No paint, coating, or wax containing ? is allowed. Ans: — lead
Coatings for contact with potable water must be approved by ? ,
the National Sanitation Foundation, or the Food and Drug
Administration. Ans: — EPA
An elevated storage tank is usually ? supported above ground on a
tower. Ans: — steel
Pressure from an elevated tank is maintained by the ? of the water
column. Ans: — height
A ? is a tank resting on the ground that is greater in height than
diameter. Ans: — standpipe
© 2025 All rights reserved
