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 disinfecti...
TCEQ Class C Water License Exam
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 an
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,
corrosive
Which of the following would be considered a part of a hypo-chlorinator
system
(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-
(Ans- A flow measuring device
Drawdown of a water well is determined by
(Ans- Difference in static and pumping levels
pH of water indicates
(Ans- If it's acidic or basic
The pH of water is expressed on a pH scale of
(Ans- 0-14
Water that is considered neutral is expressed on the pH scale at
(Ans- 7.0
Which of the following is a required Step in collecting a routine distribution
sample for bacteriological testing?
(Ans- Use of an approved, sterile sample container
Sand filtration will remove which of the following from surface water
(Ans- Turbidity
Activated carbon is used in a surface water plant primarily for
(Ans- Taste and odor control
, Which or the following chemicals are commonly used as coagulants in
surface water treatment
(Ans- Alum and ferric chloride
Ground storage tanks are required to provided with which of the following
(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
(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
(Ans- 35 psi
Before a new or repaired water line is placed into service, it must be
properly disinfected by providing a chlorine dosage of _________ and
proper detention time
(Ans- 50 mg/L
Water bearing formations beneath the earths surface that are used as a
source of water for public water supplies are
(Ans- Aquifers
The purpose of an air line on a well is
(Ans- Determine Water levels in the well
The mesh size is an important feature of a well screen because properly
sized openings should
(Ans- Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most
affected by the
(Ans- pH, alkalinity, temperature, and chemical Dosage
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