HOSMERIT
TCEQ CLASS C WATER LICENSE EXAM QUESTIONS
AND CORRECT ANSWERS
State Agency responsince for enforcing the safe drinking water act in TexasTexas Commission on
environmental Quality
What minerals can cause water hardnessCalcium 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 supplies are an indication that
Water supply is contaminated, harmful bacteria may be present, possible pathogenicorganisms in
the water, water is unsuitable for drinking
A disease that may be spread by inadequately disinfected waterDysentery
The most common disinfecting chemical used in disinfection of small water supplies isCalcium
hypochlorite
A physical connection between a potable water supply and house well would be
,A cross connection
Milligrams per liter of chlorine used up by reacting with the iron organics of bacteria iscalled
Demand
Which of the following is a physical characteristic of chlorine gas?
Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
Which of the following would be considered a part of a hypo-chlorinator system Solution feed
pump
According to the state rules and regulations, each public water Supply wells shall be installed
with an elevated concrete sealing block, screened vents, and-
A flow measuring device
Drawdown of a well water is determined byStatic and pumping level variation
pH of water providesIf it's acidic or basic
The pH of water is represented on a pH scale of 0-14
Neutral water on pH scale is represented at
7.0
Which of the following is an essential Step in routine distribution sample collection for
bacteriological testing?
, Use of an approved, sterile sample container
Sand filtration will eliminate which of the following from surface waterTurbidity
Activated carbon in a surface water plant is primarily used forTaste and odor control
Which or the following chemicals are surface water treatment commonly used ascoagulants
Alum and ferric chloride
Ground storage tanks are required to provided with which of the following
Screened vents, an approved locking roof hatch, an overflow pipe with hinged flapdevice, annual
inspection and maintenance as needed
An elevated storage tank should be protected against corrosion by
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 aminimum of
normal operating pressure of
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
50 mg/L
Water bearing formations beneath the earths surface that are used as a source of waterfor public
water supplies are
Aquifers
TCEQ CLASS C WATER LICENSE EXAM QUESTIONS
AND CORRECT ANSWERS
State Agency responsince for enforcing the safe drinking water act in TexasTexas Commission on
environmental Quality
What minerals can cause water hardnessCalcium 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 supplies are an indication that
Water supply is contaminated, harmful bacteria may be present, possible pathogenicorganisms in
the water, water is unsuitable for drinking
A disease that may be spread by inadequately disinfected waterDysentery
The most common disinfecting chemical used in disinfection of small water supplies isCalcium
hypochlorite
A physical connection between a potable water supply and house well would be
,A cross connection
Milligrams per liter of chlorine used up by reacting with the iron organics of bacteria iscalled
Demand
Which of the following is a physical characteristic of chlorine gas?
Greenish-Yellow Color, heavier than air, pungent penetrating odor, corrosive
Which of the following would be considered a part of a hypo-chlorinator system Solution feed
pump
According to the state rules and regulations, each public water Supply wells shall be installed
with an elevated concrete sealing block, screened vents, and-
A flow measuring device
Drawdown of a well water is determined byStatic and pumping level variation
pH of water providesIf it's acidic or basic
The pH of water is represented on a pH scale of 0-14
Neutral water on pH scale is represented at
7.0
Which of the following is an essential Step in routine distribution sample collection for
bacteriological testing?
, Use of an approved, sterile sample container
Sand filtration will eliminate which of the following from surface waterTurbidity
Activated carbon in a surface water plant is primarily used forTaste and odor control
Which or the following chemicals are surface water treatment commonly used ascoagulants
Alum and ferric chloride
Ground storage tanks are required to provided with which of the following
Screened vents, an approved locking roof hatch, an overflow pipe with hinged flapdevice, annual
inspection and maintenance as needed
An elevated storage tank should be protected against corrosion by
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 aminimum of
normal operating pressure of
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
50 mg/L
Water bearing formations beneath the earths surface that are used as a source of waterfor public
water supplies are
Aquifers
