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Class D Water Operator License Exam
TCEQ Questions and Answers Latest
2026
T/F: In Texas, about 75% of all water is used for
commercial, industrial, or agricultural purposes. Ans:
True
Water covers approximately ________ of Earth's surface.
Ans: 71%
Drought is an extended period when a region receives a
deficiency in its ________ water supply. Ans: atmospheric,
ground, or surface
T/F: Only about 1 gallon of tap water per person/day is
used for drinking and cooking Ans: True
Excluding outside water use, the average household uses
about _______ gallons of water per month for inside use
Ans: 2,000
T/F: Only 3% of all the fresh water on earth can be easily
accessed for use. Ans: False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH)
assumed primacy over the Safe Drinking Water Act from
the EPA. Ans: True
© 2025 All rights reserved
, 2 | Page
T/F: PWS officials should be pro-active in their approach
to terrorism. Ans: 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. Ans: Rule of Capture
In Texas, agricultural water demand accounts for about
___% of the total water used. Ans: 57%
T/F: An example of a non-transient non-community PWS
is a rural school. Ans: True
Monitoring average and maximum daily water ______
enables us to plan ahead for growth. Ans: Demand
T/F: The Safe Drinking Water Act sets standards for
drinking water including physical, chemical,
bacteriological, and radiological characteristics. Ans:
True
"Potable" means water is safe to drink and has a
measurable chlorine ________. Ans: Residual
The plant operator is responsible for a sufficient supply
of safe and ________ drinking water. Ans: 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. Ans: False (130 gals per person per day)
© 2025 All rights reserved
, 3 | Page
T/F: The primary state regulator of water utilities is the
TCEQ. Ans: 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. Ans: True
Meter readers bring in operating revenue and profoundly
impact _____ relations. Ans: Public
The federal regulator of drinking water is the _____. Ans:
EPA
T/F: Duties of distribution operator include repairing
leaks, making taps, flushing mains, and taking
radiological samples. Ans: 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? Ans:
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. Ans: 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.
Ans: False (3 years)
T/F: The physical characteristics of water are color, taste,
odor, temperature, and turbidity. Ans: True
© 2025 All rights reserved
Class D Water Operator License Exam
TCEQ Questions and Answers Latest
2026
T/F: In Texas, about 75% of all water is used for
commercial, industrial, or agricultural purposes. Ans:
True
Water covers approximately ________ of Earth's surface.
Ans: 71%
Drought is an extended period when a region receives a
deficiency in its ________ water supply. Ans: atmospheric,
ground, or surface
T/F: Only about 1 gallon of tap water per person/day is
used for drinking and cooking Ans: True
Excluding outside water use, the average household uses
about _______ gallons of water per month for inside use
Ans: 2,000
T/F: Only 3% of all the fresh water on earth can be easily
accessed for use. Ans: False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH)
assumed primacy over the Safe Drinking Water Act from
the EPA. Ans: True
© 2025 All rights reserved
, 2 | Page
T/F: PWS officials should be pro-active in their approach
to terrorism. Ans: 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. Ans: Rule of Capture
In Texas, agricultural water demand accounts for about
___% of the total water used. Ans: 57%
T/F: An example of a non-transient non-community PWS
is a rural school. Ans: True
Monitoring average and maximum daily water ______
enables us to plan ahead for growth. Ans: Demand
T/F: The Safe Drinking Water Act sets standards for
drinking water including physical, chemical,
bacteriological, and radiological characteristics. Ans:
True
"Potable" means water is safe to drink and has a
measurable chlorine ________. Ans: Residual
The plant operator is responsible for a sufficient supply
of safe and ________ drinking water. Ans: 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. Ans: False (130 gals per person per day)
© 2025 All rights reserved
, 3 | Page
T/F: The primary state regulator of water utilities is the
TCEQ. Ans: 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. Ans: True
Meter readers bring in operating revenue and profoundly
impact _____ relations. Ans: Public
The federal regulator of drinking water is the _____. Ans:
EPA
T/F: Duties of distribution operator include repairing
leaks, making taps, flushing mains, and taking
radiological samples. Ans: 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? Ans:
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. Ans: 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.
Ans: False (3 years)
T/F: The physical characteristics of water are color, taste,
odor, temperature, and turbidity. Ans: True
© 2025 All rights reserved
