TCEQ class c water license exam | QUESTIONS AND
ANSWERS | 2025/2026
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State Agency responsince for enforcing the safe drinking Texas Commission on environmental
Quality water act in Texas
What minerals can cause water hardness Calcium and magnesium
A public water system must at all times provide Adequate quantity of water, pressure, and disinfection
, A source groundwater would be aquifer
Fecal coliform organisms sometimes found in water Water supply is contaminated, harmful bacteria may be present, possible
supplies are an indication that pathogenic organisms in the water, water is unsuitable for drinking
A disease that may be spread by inadequately disinfected Dysentery
water
A common chemical used in disinfection of small water Calcium hypochlorite
supply is
A physical connection between a potable water supply A cross connection
and house well would be
The amount of chlorine in mg/L that is used up by Demand
reacting with iron organics of bacteria is called
Which of the following is a physical characteristic of Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
chlorine gas
Which of the following would be considered a part of a Solution feed pump
hypo-chlorinator system
According to state requirements, all public water Supply A flow measuring device
wells should be provided with a raised concrete sealing
block, screened vents, and-
Drawdown of a water well is determined by Difference in static and pumping levels
pH of water indicates If it's acidic or basic
The pH of water is expressed on a pH scale of 0-14
Water that is considered neutral is expressed on the pH 7.0
scale at
Which of the following is a required Step in collecting a Use of an approved, sterile sample container
routine distribution sample for bacteriological testing?
Sand filtration will remove which of the following from Turbidity
surface water
Activated carbon is used in a surface water plant Taste and odor control
primarily for
Which or the following chemicals are commonly used as Alum and ferric chloride
coagulants in surface water treatment
Ground storage tanks are required to provided with which Screened vents, an approved locking roof hatch, an overflow pipe with hinged
of the following flap device, annual inspection and maintenance as needed
ANSWERS | 2025/2026
Save
State Agency responsince for enforcing the safe drinking Texas Commission on environmental
Quality water act in Texas
What minerals can cause water hardness Calcium and magnesium
A public water system must at all times provide Adequate quantity of water, pressure, and disinfection
, A source groundwater would be aquifer
Fecal coliform organisms sometimes found in water Water supply is contaminated, harmful bacteria may be present, possible
supplies are an indication that pathogenic organisms in the water, water is unsuitable for drinking
A disease that may be spread by inadequately disinfected Dysentery
water
A common chemical used in disinfection of small water Calcium hypochlorite
supply is
A physical connection between a potable water supply A cross connection
and house well would be
The amount of chlorine in mg/L that is used up by Demand
reacting with iron organics of bacteria is called
Which of the following is a physical characteristic of Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
chlorine gas
Which of the following would be considered a part of a Solution feed pump
hypo-chlorinator system
According to state requirements, all public water Supply A flow measuring device
wells should be provided with a raised concrete sealing
block, screened vents, and-
Drawdown of a water well is determined by Difference in static and pumping levels
pH of water indicates If it's acidic or basic
The pH of water is expressed on a pH scale of 0-14
Water that is considered neutral is expressed on the pH 7.0
scale at
Which of the following is a required Step in collecting a Use of an approved, sterile sample container
routine distribution sample for bacteriological testing?
Sand filtration will remove which of the following from Turbidity
surface water
Activated carbon is used in a surface water plant Taste and odor control
primarily for
Which or the following chemicals are commonly used as Alum and ferric chloride
coagulants in surface water treatment
Ground storage tanks are required to provided with which Screened vents, an approved locking roof hatch, an overflow pipe with hinged
of the following flap device, annual inspection and maintenance as needed
