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. - Answer -True
Water covers approximately ________ of Earth's surface. - Answer -71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - Answer -atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - Answer -True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - Answer -2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
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. - Answer -True
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,T/F: PWS officials should be pro-active in their approach to terrorism. - 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. - Answer -Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the total water
used. - Answer -57%
T/F: An example of a non-transient non-community PWS is a rural school. -
Answer -True
Monitoring average and maximum daily water ______ enables us to plan ahead for
growth. - Answer -Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including
physical, chemical, bacteriological, and radiological characteristics. - Answer -True
"Potable" means water is safe to drink and has a measurable chlorine ________. -
Answer -Residual
The plant operator is responsible for a sufficient supply of safe and ________
drinking water. - 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. - Answer -False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - 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. -
Answer -True
Meter readers bring in operating revenue and profoundly impact _____ relations. -
Answer -Public
The federal regulator of drinking water is the _____. - Answer -EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing
mains, and taking radiological samples. - 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? - 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. - Answer -False (must notify *before*)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
Exam 2026 Questions and Answers
T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - Answer -True
Water covers approximately ________ of Earth's surface. - Answer -71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - Answer -atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - Answer -True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - Answer -2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
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. - Answer -True
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,T/F: PWS officials should be pro-active in their approach to terrorism. - 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. - Answer -Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the total water
used. - Answer -57%
T/F: An example of a non-transient non-community PWS is a rural school. -
Answer -True
Monitoring average and maximum daily water ______ enables us to plan ahead for
growth. - Answer -Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including
physical, chemical, bacteriological, and radiological characteristics. - Answer -True
"Potable" means water is safe to drink and has a measurable chlorine ________. -
Answer -Residual
The plant operator is responsible for a sufficient supply of safe and ________
drinking water. - 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. - Answer -False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - 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. -
Answer -True
Meter readers bring in operating revenue and profoundly impact _____ relations. -
Answer -Public
The federal regulator of drinking water is the _____. - Answer -EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing
mains, and taking radiological samples. - 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? - 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. - Answer -False (must notify *before*)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
