Class D Water License PREPARATION TEST
2026 QUESTIONS AND CORRECT ANSWERS
GRADED A+
● The TCEQ requires all storage tanks to have screened vents, licked
hatches, a dust-proof cover, overflows with hinged flaps, and. Answer:
entry ports
● Total storage capacity (elevated storage included) must be how many
gallons?. Answer: 200
● Storage tanks must be painted, disinfected, and maintained according
to what standards?. Answer: AWWA
● Coatings on storage tanks for contact with potable water must be
approved by?. Answer: EPA
● Each foot of a water column produces how much psi?. Answer: 0.433
● What is the state minimum normal operating pressure?. Answer: 35
psi
, ● Elevated storage is water stored at least how many feet above the
highest service connection?. Answer: 80
● A ? is a tank resting on the ground that is greater in height than
diameter?. Answer: standpipe
● What kind of tank also known as (hydropneumatic tanks) are
cylindrical and horizontal to the ground.. Answer: pressure tanks
● Annual inspections on tanks must be inspected how often?. Answer:
yearly
● Cathodic protection is an ? method for preventing corrosion of the
interior of metal tanks?. Answer: electrochemical
● The TCEQ requires distribution system pressure to never fall below ?
psi.. Answer: 20
● Under normal operating conditions, the distribution pressure must be
at least ? psi.. Answer: 35
● Storage facilities ? demand on the water supply?. Answer: equalize
2026 QUESTIONS AND CORRECT ANSWERS
GRADED A+
● The TCEQ requires all storage tanks to have screened vents, licked
hatches, a dust-proof cover, overflows with hinged flaps, and. Answer:
entry ports
● Total storage capacity (elevated storage included) must be how many
gallons?. Answer: 200
● Storage tanks must be painted, disinfected, and maintained according
to what standards?. Answer: AWWA
● Coatings on storage tanks for contact with potable water must be
approved by?. Answer: EPA
● Each foot of a water column produces how much psi?. Answer: 0.433
● What is the state minimum normal operating pressure?. Answer: 35
psi
, ● Elevated storage is water stored at least how many feet above the
highest service connection?. Answer: 80
● A ? is a tank resting on the ground that is greater in height than
diameter?. Answer: standpipe
● What kind of tank also known as (hydropneumatic tanks) are
cylindrical and horizontal to the ground.. Answer: pressure tanks
● Annual inspections on tanks must be inspected how often?. Answer:
yearly
● Cathodic protection is an ? method for preventing corrosion of the
interior of metal tanks?. Answer: electrochemical
● The TCEQ requires distribution system pressure to never fall below ?
psi.. Answer: 20
● Under normal operating conditions, the distribution pressure must be
at least ? psi.. Answer: 35
● Storage facilities ? demand on the water supply?. Answer: equalize
