1
CLASS D WATER OPERATOR License Exam TCEQ
Comprehensive Questions and Verified Detailed
Solutions 100% Correct
Water covers approximately ________ of Earth's surface.
71%
Drought is an extended period when a region receives a deficiency in
its ________ water supply.
atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for
drinking and cooking
True
Excluding outside water use, the average household uses about
_______ gallons of water per month for inside use
2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for
use.
False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy
over the Safe Drinking Water Act from the EPA.
True
T/F: PWS officials should be pro-active in their approach to terrorism.
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.
Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the
total water used.
57%
T/F: An example of a non-transient non-community PWS is a rural
school.
True
Monitoring average and maximum daily water ______ enables us to
plan ahead for growth.
Demand
,2
T/F: The Safe Drinking Water Act sets standards for drinking water
including physical, chemical, bacteriological, and radiological
characteristics.
True
"Potable" means water is safe to drink and has a measurable chlorine
________.
Residual
The plant operator is responsible for a sufficient supply of safe and
________ drinking water.
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.
False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ.
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.
True
Meter readers bring in operating revenue and profoundly impact
_____ relations.
Public
The federal regulator of drinking water is the _____.
EPA
T/F: Duties of distribution operator include repairing leaks, making
taps, flushing mains, and taking radiological samples.
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?
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.
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.
, 3
False (3 years)
T/F: The physical characteristics of water are color, taste, odor,
temperature, and turbidity.
True
An alkaline or basic solution has a pH greater than ____.
7
T/F: The terms mg/L and ppm are not interchangeable.
False (they are interchangeable)
Suspended solids in water cannot be filtered out.
False (they can)
Solids, water hardness, pH and gases are ____ characteristics.
Chemical
T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water
molecule.
True
T/F: The State recommends a water pH of less than 7 to be maintained
at all time.
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.
True
T/F: The deeper the well, the warmer the water.
True
T/F: The threshold odor number (TON) relates to the number of
dilutions needed for the water to be tasteless.
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.
1 million
The State requires filtered water to be equal to or less than ____
turbidity units in at least 95% of the monthly samples.
0.3
The State recommends a TON of ___ or less.
3
T/F: The State recommends 20 color units or less for a quality water.
CLASS D WATER OPERATOR License Exam TCEQ
Comprehensive Questions and Verified Detailed
Solutions 100% Correct
Water covers approximately ________ of Earth's surface.
71%
Drought is an extended period when a region receives a deficiency in
its ________ water supply.
atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for
drinking and cooking
True
Excluding outside water use, the average household uses about
_______ gallons of water per month for inside use
2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for
use.
False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH) assumed primacy
over the Safe Drinking Water Act from the EPA.
True
T/F: PWS officials should be pro-active in their approach to terrorism.
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.
Rule of Capture
In Texas, agricultural water demand accounts for about ___% of the
total water used.
57%
T/F: An example of a non-transient non-community PWS is a rural
school.
True
Monitoring average and maximum daily water ______ enables us to
plan ahead for growth.
Demand
,2
T/F: The Safe Drinking Water Act sets standards for drinking water
including physical, chemical, bacteriological, and radiological
characteristics.
True
"Potable" means water is safe to drink and has a measurable chlorine
________.
Residual
The plant operator is responsible for a sufficient supply of safe and
________ drinking water.
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.
False (130 gals per person per day)
T/F: The primary state regulator of water utilities is the TCEQ.
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.
True
Meter readers bring in operating revenue and profoundly impact
_____ relations.
Public
The federal regulator of drinking water is the _____.
EPA
T/F: Duties of distribution operator include repairing leaks, making
taps, flushing mains, and taking radiological samples.
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?
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.
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.
, 3
False (3 years)
T/F: The physical characteristics of water are color, taste, odor,
temperature, and turbidity.
True
An alkaline or basic solution has a pH greater than ____.
7
T/F: The terms mg/L and ppm are not interchangeable.
False (they are interchangeable)
Suspended solids in water cannot be filtered out.
False (they can)
Solids, water hardness, pH and gases are ____ characteristics.
Chemical
T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water
molecule.
True
T/F: The State recommends a water pH of less than 7 to be maintained
at all time.
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.
True
T/F: The deeper the well, the warmer the water.
True
T/F: The threshold odor number (TON) relates to the number of
dilutions needed for the water to be tasteless.
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.
1 million
The State requires filtered water to be equal to or less than ____
turbidity units in at least 95% of the monthly samples.
0.3
The State recommends a TON of ___ or less.
3
T/F: The State recommends 20 color units or less for a quality water.
