Class D Water Operator License Exam
2026 Questions and Answers
T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - Correct answer-True
Water covers approximately ________ of Earth's surface. - Correct answer-71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - Correct answer-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - Correct answer-True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - Correct answer-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
Correct answer-False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over the
Safe Drinking Water Act from the EPA. - Correct answer-True
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,T/F: PWS officials should be pro-active in their approach to terrorism. - Correct
answer-True
_________ permits the owner of a well to pump as much water as desired, even if
the water is drained from beneath the land of others. - Correct answer-Rule of
Capture
In Texas, agricultural water demand accounts for about ___% of the total water
used. - Correct answer-57%
T/F: An example of a non-transient non-community PWS is a rural school. -
Correct answer-True
Monitoring average and maximum daily water ______ enables us to plan ahead for
growth. - Correct answer-Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including
physical, chemical, bacteriological, and radiological characteristics. - Correct
answer-True
"Potable" means water is safe to drink and has a measurable chlorine ________. -
Correct answer-Residual
The plant operator is responsible for a sufficient supply of safe and ________
drinking water. - Correct answer-Palatable
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, T/F: The Texas State Board of Fire Insurance requires utilities that provide fire
protection to have a minimum amount of water available based on 30 gals per
person per day. - Correct answer-False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - Correct answer-
True
T/F: All community and non-transient non-community PWS, regardless of source
of water, must be under the supervision of a licensed water works operator. -
Correct answer-True
Meter readers bring in operating revenue and profoundly impact _____ relations. -
Correct answer-Public
The federal regulator of drinking water is the _____. - Correct answer-EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing
mains, and taking radiological samples. - Correct answer-False (Repair leaks,
Make taps, Flush mains, Operate pumps, Take *bacteriological* samples)
A service area has 1000 service connections. What can we estimate the population
of this service area to be? - Correct answer-3,000 (multiply connections x 3)
T/F: The State must be notified after an existing facility is changed or after
construction of a new facility. - Correct answer-False (must notify *before*)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
2026 Questions and Answers
T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - Correct answer-True
Water covers approximately ________ of Earth's surface. - Correct answer-71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - Correct answer-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - Correct answer-True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - Correct answer-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
Correct answer-False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over the
Safe Drinking Water Act from the EPA. - Correct answer-True
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,T/F: PWS officials should be pro-active in their approach to terrorism. - Correct
answer-True
_________ permits the owner of a well to pump as much water as desired, even if
the water is drained from beneath the land of others. - Correct answer-Rule of
Capture
In Texas, agricultural water demand accounts for about ___% of the total water
used. - Correct answer-57%
T/F: An example of a non-transient non-community PWS is a rural school. -
Correct answer-True
Monitoring average and maximum daily water ______ enables us to plan ahead for
growth. - Correct answer-Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including
physical, chemical, bacteriological, and radiological characteristics. - Correct
answer-True
"Potable" means water is safe to drink and has a measurable chlorine ________. -
Correct answer-Residual
The plant operator is responsible for a sufficient supply of safe and ________
drinking water. - Correct answer-Palatable
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, T/F: The Texas State Board of Fire Insurance requires utilities that provide fire
protection to have a minimum amount of water available based on 30 gals per
person per day. - Correct answer-False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - Correct answer-
True
T/F: All community and non-transient non-community PWS, regardless of source
of water, must be under the supervision of a licensed water works operator. -
Correct answer-True
Meter readers bring in operating revenue and profoundly impact _____ relations. -
Correct answer-Public
The federal regulator of drinking water is the _____. - Correct answer-EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing
mains, and taking radiological samples. - Correct answer-False (Repair leaks,
Make taps, Flush mains, Operate pumps, Take *bacteriological* samples)
A service area has 1000 service connections. What can we estimate the population
of this service area to be? - Correct answer-3,000 (multiply connections x 3)
T/F: The State must be notified after an existing facility is changed or after
construction of a new facility. - Correct answer-False (must notify *before*)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
