TCEQ Class C Water License Exam
Questions and answers 100% pass
State Agency responsible for enforcing the safe drinking water act in Texas (Ans- Texas
Commission on environmental Quality
What minerals can cause water hardness (Ans- Calcium and magnesium
A public water system must at all times provide (Ans- Adequate quantity of water,
pressure, and disinfection
A source groundwater would be (Ans- aquifer
Fecal coliform organisms sometimes found in water supplies are a indication that (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 (Ans- Dysentery
A common chemical used in disinfection of small water supply is (Ans- Calcium
hypochlorite
,A physical connection between a potable water supply and house well would be (Ans- A
cross connection
The amount of chlorine in mg/L that is used up by reacting with iron organics of bacteria is
called (Ans- Demand
Which of the following is a physical characteristic of chlorine gas (Ans- Greenish-Yellow
Color, heavier than air, pungent penetrating odor,
Which of the following would be considered a component of a hypo-chlorinator system?
(Ans- Solution feed pump)
According to state rules, all public water supply wells should
supplied with a raised concrete sealing block, screened vents, and (Ans- A flow measuring
equipment is used to determine the drawdown of a water well.
(Ans- The difference in static and pumping levels reveals whether the water is acidic or
basic.
The pH of water is stated on a pH scale (Ans-0-14).
Water deemed neutral is represented on the pH scale at (Ans-7.0).
Which of the following is a mandatory step in collecting a routine distribution sample for
bacteriological testing? (Answer: Use an approved, sterile sample container
, Sand filtration will remove which of the following from surface water (Ans- Turbidity).
Activated carbon is typically used in surface water plants to regulate taste and odor.
Which of the following substances is commonly employed as a coagulant in surface water
treatment?
(Ans- Alum and ferric chloride ground storage tanks must have which of the following:
screened vents, an approved locking roof hatch, and an overflow pipe
with a hinged flap device, annual inspection, and repair as needed.
An elevated storage tank should be protected against corrosion
(Ans - Painting, cathodic protection, water stabilization, and only employing galvanized
and lead-based primed components.
A public water supply system should maintain residual pressure of 20 psi.
and a minimum of typical operating pressure of (Ans-35 psi
thoroughly disinfected by delivering a chlorine dosage of _________.
Proper detention time (Ans-50 mg/L)
Ans- Aquifers are water-bearing formations beneath the earth's surface that serve as a
source of water for public water supply.
Questions and answers 100% pass
State Agency responsible for enforcing the safe drinking water act in Texas (Ans- Texas
Commission on environmental Quality
What minerals can cause water hardness (Ans- Calcium and magnesium
A public water system must at all times provide (Ans- Adequate quantity of water,
pressure, and disinfection
A source groundwater would be (Ans- aquifer
Fecal coliform organisms sometimes found in water supplies are a indication that (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 (Ans- Dysentery
A common chemical used in disinfection of small water supply is (Ans- Calcium
hypochlorite
,A physical connection between a potable water supply and house well would be (Ans- A
cross connection
The amount of chlorine in mg/L that is used up by reacting with iron organics of bacteria is
called (Ans- Demand
Which of the following is a physical characteristic of chlorine gas (Ans- Greenish-Yellow
Color, heavier than air, pungent penetrating odor,
Which of the following would be considered a component of a hypo-chlorinator system?
(Ans- Solution feed pump)
According to state rules, all public water supply wells should
supplied with a raised concrete sealing block, screened vents, and (Ans- A flow measuring
equipment is used to determine the drawdown of a water well.
(Ans- The difference in static and pumping levels reveals whether the water is acidic or
basic.
The pH of water is stated on a pH scale (Ans-0-14).
Water deemed neutral is represented on the pH scale at (Ans-7.0).
Which of the following is a mandatory step in collecting a routine distribution sample for
bacteriological testing? (Answer: Use an approved, sterile sample container
, Sand filtration will remove which of the following from surface water (Ans- Turbidity).
Activated carbon is typically used in surface water plants to regulate taste and odor.
Which of the following substances is commonly employed as a coagulant in surface water
treatment?
(Ans- Alum and ferric chloride ground storage tanks must have which of the following:
screened vents, an approved locking roof hatch, and an overflow pipe
with a hinged flap device, annual inspection, and repair as needed.
An elevated storage tank should be protected against corrosion
(Ans - Painting, cathodic protection, water stabilization, and only employing galvanized
and lead-based primed components.
A public water supply system should maintain residual pressure of 20 psi.
and a minimum of typical operating pressure of (Ans-35 psi
thoroughly disinfected by delivering a chlorine dosage of _________.
Proper detention time (Ans-50 mg/L)
Ans- Aquifers are water-bearing formations beneath the earth's surface that serve as a
source of water for public water supply.
