TCEQ Class C Water License Exam - Questions & Verified Answers
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 and A cross connection
house well would be
The amount of chlorine in mg/L that is used up by reacting Demand
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
2026-2027
, TCEQ Class C Water License Exam - Questions & Verified Answers
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 primarily Taste and odor control
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 flap
of the following device, annual inspection and maintenance as needed
An elevated storage tank should be protected against Painting, cathodic protection, water stabilization, and only using galvanized and
corrosion by lead based primed components
A public water supply system should maintain residual 35 psi
pressure of 20 psi and a minimum of normal operating
pressure of
Before a new or repaired water line is placed into service, 50 mg/L
it must be properly disinfected by providing a chlorine
dosage of _________ and proper detention time
Water bearing formations beneath the earths surface that Aquifers
are used as a source of water for public water supplies are
The purpose of an air line on a well is Determine Water leves in the well
The mesh size is an important feature of a well screen Reduce the amount of Sand pumped
because properly sized openings should
When treating surface Water, the process of coagularon pH, alkalinity, temperature, and chemical Dosage
will be most affected by the
A rapid sand filter should be backwashed When The loss of head gauge indicated between 6 and 10 feet
Which of the following is an acceptable disinfection 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual when using
residual at the far reaches of the distribution System chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free
chlorine residual for ground water Supply
2026-2027
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 and A cross connection
house well would be
The amount of chlorine in mg/L that is used up by reacting Demand
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
2026-2027
, TCEQ Class C Water License Exam - Questions & Verified Answers
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 primarily Taste and odor control
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 flap
of the following device, annual inspection and maintenance as needed
An elevated storage tank should be protected against Painting, cathodic protection, water stabilization, and only using galvanized and
corrosion by lead based primed components
A public water supply system should maintain residual 35 psi
pressure of 20 psi and a minimum of normal operating
pressure of
Before a new or repaired water line is placed into service, 50 mg/L
it must be properly disinfected by providing a chlorine
dosage of _________ and proper detention time
Water bearing formations beneath the earths surface that Aquifers
are used as a source of water for public water supplies are
The purpose of an air line on a well is Determine Water leves in the well
The mesh size is an important feature of a well screen Reduce the amount of Sand pumped
because properly sized openings should
When treating surface Water, the process of coagularon pH, alkalinity, temperature, and chemical Dosage
will be most affected by the
A rapid sand filter should be backwashed When The loss of head gauge indicated between 6 and 10 feet
Which of the following is an acceptable disinfection 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual when using
residual at the far reaches of the distribution System chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free
chlorine residual for ground water Supply
2026-2027
