TCEQ CLASS D WATER OPERATORS
LICENSE EXAM QUESTIONS AND
ANSWERS
True or False: In Texas, approximately 75% of all water is used for commercial,
industrial, or agricultural purposes. - Answer- True
What percentage of Earth's surface is covered by water? - Answer- 71%
Define drought: An extended period when a region experiences a deficiency in its
water supply, which can be atmospheric, ground, or surface water. - Answer-
True or False: Only about 1 gallon of tap water per person per day is used for
drinking and cooking. - Answer- True
Excluding outside water use, how many gallons of water does the average
household use per month for inside use? - Answer- 2,000
True or False: Only 1% of all the fresh water on earth can be easily accessed for
use. - Answer- False (only 1%)
True or False: In 1978, the Texas Department of Health (TDH) took over primacy of
the Safe Drinking Water Act from the EPA. - Answer- True
True or False: Public Water System (PWS) officials should take a proactive
approach to terrorism. - Answer- True
What legal concept 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, what percentage of the total water used is accounted for by agricultural
water demand? - Answer- 57%
True or False: A rural school is an example of a non-transient non-community PWS.
- Answer- True
What does monitoring average and maximum daily water enable us to plan ahead
for? - Answer- Demand
True or False: The Safe Drinking Water Act establishes standards for physical,
chemical, bacteriological, and radiological characteristics of drinking water. - Answer-
True
Define 'potable' in relation to water safety and chlorine. - Answer- Residual
, What is the responsibility of a plant operator in ensuring drinking water quality? -
Answer- Palatable
True or False: Utilities providing fire protection must have a minimum of 130 gallons
of water per person per day according to the Texas State Board of Fire Insurance. -
Answer- False
True or False: The TCEQ is the primary state regulator of water utilities. - Answer-
True
True or False: All PWS, regardless of water source, must be supervised by a
licensed water works operator. - Answer- True
How do meter readers impact revenue and community relations? - Answer- Public
Who is the federal regulator of drinking water? - 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)
Estimate the population of a service area with 1000 service connections. - Answer-
3,000 (multiply connections x 3)
T/F: The State must be notified before 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 3 years at ground and purchase water systems
with 250 connections or less. - Answer- False (3 years)
T/F: The physical characteristics of water include color, taste, odor, temperature, and
turbidity. - Answer- True
What pH value indicates an alkaline or basic solution? - Answer- 7
T/F: The terms mg/L and ppm are interchangeable. - Answer- False (they are not
interchangeable)
Can suspended solids in water be filtered out? - Answer- False (they can)
What type of characteristics are solids, water hardness, pH, and gases? - Answer-
Chemical
T/F: Each water molecule contains 2 hydrogen atoms and 1 oxygen atom. - Answer-
True
True or False: The State recommends maintaining a water pH slightly greater than 7
and non-corrosive. - Answer- False
LICENSE EXAM QUESTIONS AND
ANSWERS
True or False: In Texas, approximately 75% of all water is used for commercial,
industrial, or agricultural purposes. - Answer- True
What percentage of Earth's surface is covered by water? - Answer- 71%
Define drought: An extended period when a region experiences a deficiency in its
water supply, which can be atmospheric, ground, or surface water. - Answer-
True or False: Only about 1 gallon of tap water per person per day is used for
drinking and cooking. - Answer- True
Excluding outside water use, how many gallons of water does the average
household use per month for inside use? - Answer- 2,000
True or False: Only 1% of all the fresh water on earth can be easily accessed for
use. - Answer- False (only 1%)
True or False: In 1978, the Texas Department of Health (TDH) took over primacy of
the Safe Drinking Water Act from the EPA. - Answer- True
True or False: Public Water System (PWS) officials should take a proactive
approach to terrorism. - Answer- True
What legal concept 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, what percentage of the total water used is accounted for by agricultural
water demand? - Answer- 57%
True or False: A rural school is an example of a non-transient non-community PWS.
- Answer- True
What does monitoring average and maximum daily water enable us to plan ahead
for? - Answer- Demand
True or False: The Safe Drinking Water Act establishes standards for physical,
chemical, bacteriological, and radiological characteristics of drinking water. - Answer-
True
Define 'potable' in relation to water safety and chlorine. - Answer- Residual
, What is the responsibility of a plant operator in ensuring drinking water quality? -
Answer- Palatable
True or False: Utilities providing fire protection must have a minimum of 130 gallons
of water per person per day according to the Texas State Board of Fire Insurance. -
Answer- False
True or False: The TCEQ is the primary state regulator of water utilities. - Answer-
True
True or False: All PWS, regardless of water source, must be supervised by a
licensed water works operator. - Answer- True
How do meter readers impact revenue and community relations? - Answer- Public
Who is the federal regulator of drinking water? - 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)
Estimate the population of a service area with 1000 service connections. - Answer-
3,000 (multiply connections x 3)
T/F: The State must be notified before 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 3 years at ground and purchase water systems
with 250 connections or less. - Answer- False (3 years)
T/F: The physical characteristics of water include color, taste, odor, temperature, and
turbidity. - Answer- True
What pH value indicates an alkaline or basic solution? - Answer- 7
T/F: The terms mg/L and ppm are interchangeable. - Answer- False (they are not
interchangeable)
Can suspended solids in water be filtered out? - Answer- False (they can)
What type of characteristics are solids, water hardness, pH, and gases? - Answer-
Chemical
T/F: Each water molecule contains 2 hydrogen atoms and 1 oxygen atom. - Answer-
True
True or False: The State recommends maintaining a water pH slightly greater than 7
and non-corrosive. - Answer- False
