TEXAS CLASS D WATER OPERATOR LICENSE EXAM 2026
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS LATEST VERSION (100% VERIFIED ANSWERS)
ALREADY GRADED A+
T/F: In Texas, about 75% of all water is used for commercial, industrial, or agricultural
purposes. - ANSWERS-True
Water covers approximately ________ of Earth's surface. - ANSWERS-71%
Drought is an extended period when a region receives a deficiency in its ________ water
supply. - ANSWERS-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and cooking -
ANSWERS-True
Excluding outside water use, the average household uses about _______ gallons of water per
month for inside use - ANSWERS-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. - ANSWERS-False
(only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over the Safe Drinking
Water Act from the EPA. - ANSWERS-True
,T/F: PWS officials should be pro-active in their approach to terrorism. - ANSWERS-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. - ANSWERS-Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the total water used. -
ANSWERS-57%
T/F: An example of a non-transient non-community PWS is a rural school. - ANSWERS-True
Monitoring average and maximum daily water ______ enables us to plan ahead for growth. -
ANSWERS-Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including physical,
chemical, bacteriological, and radiological characteristics. - ANSWERS-True
"Potable" means water is safe to drink and has a measurable chlorine ________. - ANSWERS-
Residual
The plant operator is responsible for a sufficient supply of safe and ________ drinking water. -
ANSWERS-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. - ANSWERS-
False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - ANSWERS-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. - ANSWERS-True
Meter readers bring in operating revenue and profoundly impact _____ relations. - ANSWERS-
Public
The federal regulator of drinking water is the _____. - ANSWERS-EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing mains, and
taking radiological samples. - ANSWERS-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? - ANSWERS-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. - ANSWERS-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. - ANSWERS-False (3 years)
T/F: The physical characteristics of water are color, taste, odor, temperature, and turbidity. -
ANSWERS-True
An alkaline or basic solution has a pH greater than ____. - ANSWERS-7
T/F: The terms mg/L and ppm are not interchangeable. - ANSWERS-False (they are
interchangeable)
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS LATEST VERSION (100% VERIFIED ANSWERS)
ALREADY GRADED A+
T/F: In Texas, about 75% of all water is used for commercial, industrial, or agricultural
purposes. - ANSWERS-True
Water covers approximately ________ of Earth's surface. - ANSWERS-71%
Drought is an extended period when a region receives a deficiency in its ________ water
supply. - ANSWERS-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and cooking -
ANSWERS-True
Excluding outside water use, the average household uses about _______ gallons of water per
month for inside use - ANSWERS-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. - ANSWERS-False
(only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over the Safe Drinking
Water Act from the EPA. - ANSWERS-True
,T/F: PWS officials should be pro-active in their approach to terrorism. - ANSWERS-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. - ANSWERS-Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the total water used. -
ANSWERS-57%
T/F: An example of a non-transient non-community PWS is a rural school. - ANSWERS-True
Monitoring average and maximum daily water ______ enables us to plan ahead for growth. -
ANSWERS-Demand
T/F: The Safe Drinking Water Act sets standards for drinking water including physical,
chemical, bacteriological, and radiological characteristics. - ANSWERS-True
"Potable" means water is safe to drink and has a measurable chlorine ________. - ANSWERS-
Residual
The plant operator is responsible for a sufficient supply of safe and ________ drinking water. -
ANSWERS-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. - ANSWERS-
False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ. - ANSWERS-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. - ANSWERS-True
Meter readers bring in operating revenue and profoundly impact _____ relations. - ANSWERS-
Public
The federal regulator of drinking water is the _____. - ANSWERS-EPA
T/F: Duties of distribution operator include repairing leaks, making taps, flushing mains, and
taking radiological samples. - ANSWERS-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? - ANSWERS-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. - ANSWERS-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. - ANSWERS-False (3 years)
T/F: The physical characteristics of water are color, taste, odor, temperature, and turbidity. -
ANSWERS-True
An alkaline or basic solution has a pH greater than ____. - ANSWERS-7
T/F: The terms mg/L and ppm are not interchangeable. - ANSWERS-False (they are
interchangeable)
