1
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Class D Water Operator License Exam
TCEQ Questions and Answers (100%
Correct Answers) Already Graded A+
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%
© 2025 Assignment Expert
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
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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
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
, 2
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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
© 2025 Assignment Expert
available based on 30 gals per person per day.—Ans: False (130
gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ.—Ans:
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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)
, 3
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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
An alkaline or basic solution has a pH greater than ____.—Ans: 7
T/F: The terms mg/L and ppm are not interchangeable.—Ans:
False (they are interchangeable)
Suspended solids in water cannot be filtered out.—Ans: False
(they can)
Solids, water hardness, pH and gases are ____ characteristics.—
Ans: Chemical
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T/F: There are 2 hydrogen atoms and 1 oxygen atom in each
water molecule.—Ans: True
T/F: The State recommends a water pH of less than 7 to be
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maintained at all time.—Ans: False (The state recommends a pH
slightly greater than 7 and for the water to be non-corrosive.)
T/F: Taste and odor can come from organisms such as vegetation,
bacteria, and algae, and from certain chemicals and metals.—
Ans: True
T/F: The deeper the well, the warmer the water.—Ans: True
T/F: The threshold odor number (TON) relates to the number of
dilutions needed for the water to be tasteless.—Ans: False (It
reflects the number of dilutions needed for water sample to be
odorless)
One part per million or 1 mg/L means that for every ____ pounds of
water there is one pound of material in it.—Ans: 1 million
The State requires filtered water to be equal to or less than ____
turbidity units in at least 95% of the monthly samples.—Ans: 0.3
The State recommends a TON of ___ or less.—Ans: 3
T/F: The State recommends 20 color units or less for a quality
water.—Ans: False (The state recommends 15 units of color or less
for drinking water.)
For Expert help and assignment solutions, +254707240657
Class D Water Operator License Exam
TCEQ Questions and Answers (100%
Correct Answers) Already Graded A+
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%
© 2025 Assignment Expert
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
Guru01 - Stuvia
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
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
, 2
For Expert help and assignment solutions, +254707240657
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
© 2025 Assignment Expert
available based on 30 gals per person per day.—Ans: False (130
gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ.—Ans:
Guru01 - Stuvia
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)
, 3
For Expert help and assignment solutions, +254707240657
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
An alkaline or basic solution has a pH greater than ____.—Ans: 7
T/F: The terms mg/L and ppm are not interchangeable.—Ans:
False (they are interchangeable)
Suspended solids in water cannot be filtered out.—Ans: False
(they can)
Solids, water hardness, pH and gases are ____ characteristics.—
Ans: Chemical
© 2025 Assignment Expert
T/F: There are 2 hydrogen atoms and 1 oxygen atom in each
water molecule.—Ans: True
T/F: The State recommends a water pH of less than 7 to be
Guru01 - Stuvia
maintained at all time.—Ans: False (The state recommends a pH
slightly greater than 7 and for the water to be non-corrosive.)
T/F: Taste and odor can come from organisms such as vegetation,
bacteria, and algae, and from certain chemicals and metals.—
Ans: True
T/F: The deeper the well, the warmer the water.—Ans: True
T/F: The threshold odor number (TON) relates to the number of
dilutions needed for the water to be tasteless.—Ans: False (It
reflects the number of dilutions needed for water sample to be
odorless)
One part per million or 1 mg/L means that for every ____ pounds of
water there is one pound of material in it.—Ans: 1 million
The State requires filtered water to be equal to or less than ____
turbidity units in at least 95% of the monthly samples.—Ans: 0.3
The State recommends a TON of ___ or less.—Ans: 3
T/F: The State recommends 20 color units or less for a quality
water.—Ans: False (The state recommends 15 units of color or less
for drinking water.)
