TCEQ Class C Water License Exam - Questions &
Complete Solutions
State Agency responsible for enforcing the safe drinking water act in Texas
Right Ans - Texas Commission on environmental Quality
What minerals can cause water hardness Right Ans - Calcium and
magnesium
A public water system must at all times provide Right Ans - Adequate
quantity of water, pressure, and disinfection
A source groundwater would be Right Ans - aquifer
Fecal coliform organisms sometimes found in water supplies are an indication
that Right Ans - Water supply is contaminated, harmful bacteria may be
present, possible pathogenic organisms in the water, water is unsuitable for
drinking
A disease that may be spread by inadequately disinfected water Right Ans -
Dysentery
A common chemical used in disinfection of small water supply is Right Ans
- Calcium hypochlorite
A physical connection between a potable water supply and house well would
be Right Ans - A cross connection
The amount of chlorine in mg/L that is used up by reacting with iron organics
of bacteria is called Right Ans - Demand
Which of the following is a physical characteristic of chlorine gas Right Ans
- Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
Which of the following would be considered a part of a hypo-chlorinator
system Right Ans - Solution feed pump
, According to state requirements, all public water Supply wells should be
provided with a raised concrete sealing block, screened vents, and- Right
Ans - A flow measuring device
Drawdown of a water well is determined by Right Ans - Difference in static
and pumping levels
pH of water indicates Right Ans - If it's acidic or basic
The pH of water is expressed on a pH scale of Right Ans - 0-14
Water that is considered neutral is expressed on the pH scale at Right Ans -
7.0
Which of the following is a required Step in collecting a routine distribution
sample for bacteriological testing? Right Ans - Use of an approved, sterile
sample container
Sand filtration will remove which of the following from surface water Right
Ans - Turbidity
Activated carbon is used in a surface water plant primarily for Right Ans -
Taste and odor control
Which or the following chemicals are commonly used as coagulants in surface
water treatment Right Ans - Alum and ferric chloride
Ground storage tanks are required to provided with which of the following
Right Ans - Screened vents, an approved locking roof hatch, an overflow pipe
with hinged flap device, annual inspection and maintenance as needed
An elevated storage tank should be protected against corrosion by Right
Ans - Painting, cathodic protection, water stabilization, and only using
galvanized and lead based primed components
A public water supply system should maintain residual pressure of 20 psi and
a minimum of normal operating pressure of Right Ans - 35 psi
Complete Solutions
State Agency responsible for enforcing the safe drinking water act in Texas
Right Ans - Texas Commission on environmental Quality
What minerals can cause water hardness Right Ans - Calcium and
magnesium
A public water system must at all times provide Right Ans - Adequate
quantity of water, pressure, and disinfection
A source groundwater would be Right Ans - aquifer
Fecal coliform organisms sometimes found in water supplies are an indication
that Right Ans - Water supply is contaminated, harmful bacteria may be
present, possible pathogenic organisms in the water, water is unsuitable for
drinking
A disease that may be spread by inadequately disinfected water Right Ans -
Dysentery
A common chemical used in disinfection of small water supply is Right Ans
- Calcium hypochlorite
A physical connection between a potable water supply and house well would
be Right Ans - A cross connection
The amount of chlorine in mg/L that is used up by reacting with iron organics
of bacteria is called Right Ans - Demand
Which of the following is a physical characteristic of chlorine gas Right Ans
- Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
Which of the following would be considered a part of a hypo-chlorinator
system Right Ans - Solution feed pump
, According to state requirements, all public water Supply wells should be
provided with a raised concrete sealing block, screened vents, and- Right
Ans - A flow measuring device
Drawdown of a water well is determined by Right Ans - Difference in static
and pumping levels
pH of water indicates Right Ans - If it's acidic or basic
The pH of water is expressed on a pH scale of Right Ans - 0-14
Water that is considered neutral is expressed on the pH scale at Right Ans -
7.0
Which of the following is a required Step in collecting a routine distribution
sample for bacteriological testing? Right Ans - Use of an approved, sterile
sample container
Sand filtration will remove which of the following from surface water Right
Ans - Turbidity
Activated carbon is used in a surface water plant primarily for Right Ans -
Taste and odor control
Which or the following chemicals are commonly used as coagulants in surface
water treatment Right Ans - Alum and ferric chloride
Ground storage tanks are required to provided with which of the following
Right Ans - Screened vents, an approved locking roof hatch, an overflow pipe
with hinged flap device, annual inspection and maintenance as needed
An elevated storage tank should be protected against corrosion by Right
Ans - Painting, cathodic protection, water stabilization, and only using
galvanized and lead based primed components
A public water supply system should maintain residual pressure of 20 psi and
a minimum of normal operating pressure of Right Ans - 35 psi
