TCEQ class c water license exam
Questions and Complete Solutions
Graded A+
State Agency responsince for enforcing the safe drinking water act in Texas - Answer: Texas Commission
on environmental Quality
What minerals can cause water hardness - Answer: Calcium and magnesium
A public water system must at all times provide - Answer: Adequate quantity of water, pressure, and
disinfection
A source groundwater would be - Answer: aquifer
Fecal coliform organisms sometimes found in water supplies are an indication that - Answer: 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 - Answer: Dysentery
A common chemical used in disinfection of small water supply is - Answer: Calcium hypochlorite
A physical connection between a potable water supply and house well would be - Answer: A cross
connection
The amount of chlorine in mg/L that is used up by reacting with iron organics of bacteria is called -
Answer: Demand
Which of the following is a physical characteristic of chlorine gas - Answer: Greenish-Yellow Color,
heavier than air, pungent penetrating odor, corrosive
, Which of the following would be considered a part of a hypo-chlorinator system - Answer: Solution feed
pump
According to state requirements, all public water Supply wells should be provided with a raised concrete
sealing block, screened vents, and- - Answer: A flow measuring device
Drawdown of a water well is determined by - Answer: Difference in static and pumping levels
pH of water indicates - Answer: If it's acidic or basic
The pH of water is expressed on a pH scale of - Answer: 0-14
Water that is considered neutral is expressed on the pH scale at - Answer: 7.0
Which of the following is a required Step in collecting a routine distribution sample for bacteriological
testing? - Answer: Use of an approved, sterile sample container
Sand filtration will remove which of the following from surface water - Answer: Turbidity
Activated carbon is used in a surface water plant primarily for - Answer: Taste and odor control
Which or the following chemicals are commonly used as coagulants in surface water treatment -
Answer: Alum and ferric chloride
Ground storage tanks are required to provided with which of the following - Answer: 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 - Answer: Painting, cathodic
protection, water stabilization, and only using galvanized and lead based primed components
Questions and Complete Solutions
Graded A+
State Agency responsince for enforcing the safe drinking water act in Texas - Answer: Texas Commission
on environmental Quality
What minerals can cause water hardness - Answer: Calcium and magnesium
A public water system must at all times provide - Answer: Adequate quantity of water, pressure, and
disinfection
A source groundwater would be - Answer: aquifer
Fecal coliform organisms sometimes found in water supplies are an indication that - Answer: 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 - Answer: Dysentery
A common chemical used in disinfection of small water supply is - Answer: Calcium hypochlorite
A physical connection between a potable water supply and house well would be - Answer: A cross
connection
The amount of chlorine in mg/L that is used up by reacting with iron organics of bacteria is called -
Answer: Demand
Which of the following is a physical characteristic of chlorine gas - Answer: Greenish-Yellow Color,
heavier than air, pungent penetrating odor, corrosive
, Which of the following would be considered a part of a hypo-chlorinator system - Answer: Solution feed
pump
According to state requirements, all public water Supply wells should be provided with a raised concrete
sealing block, screened vents, and- - Answer: A flow measuring device
Drawdown of a water well is determined by - Answer: Difference in static and pumping levels
pH of water indicates - Answer: If it's acidic or basic
The pH of water is expressed on a pH scale of - Answer: 0-14
Water that is considered neutral is expressed on the pH scale at - Answer: 7.0
Which of the following is a required Step in collecting a routine distribution sample for bacteriological
testing? - Answer: Use of an approved, sterile sample container
Sand filtration will remove which of the following from surface water - Answer: Turbidity
Activated carbon is used in a surface water plant primarily for - Answer: Taste and odor control
Which or the following chemicals are commonly used as coagulants in surface water treatment -
Answer: Alum and ferric chloride
Ground storage tanks are required to provided with which of the following - Answer: 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 - Answer: Painting, cathodic
protection, water stabilization, and only using galvanized and lead based primed components
