Class D Water Operator License Exam TCEQ verified with correct
answers 2026 version
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
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
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*)
T/F: A Class "D" license is valid for 2 years at ground and purchase water systems with
250 connections or less. - answer>>>False (3 years)
T/F: The physical characteristics of water are color, taste, odor, temperature, and
turbidity. - answer>>>True
An alkaline or basic solution has a pH greater than ____. - answer>>>7
T/F: The terms mg/L and ppm are not interchangeable. - answer>>>False (they are
interchangeable)
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
Suspended solids in water cannot be filtered out. - answer>>>False (they can)
Solids, water hardness, pH and gases are ____ characteristics. - answer>>>Chemical
T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water molecule. -
answer>>>True
answers 2026 version
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
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
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*)
T/F: A Class "D" license is valid for 2 years at ground and purchase water systems with
250 connections or less. - answer>>>False (3 years)
T/F: The physical characteristics of water are color, taste, odor, temperature, and
turbidity. - answer>>>True
An alkaline or basic solution has a pH greater than ____. - answer>>>7
T/F: The terms mg/L and ppm are not interchangeable. - answer>>>False (they are
interchangeable)
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
Suspended solids in water cannot be filtered out. - answer>>>False (they can)
Solids, water hardness, pH and gases are ____ characteristics. - answer>>>Chemical
T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water molecule. -
answer>>>True
