TCEQ class c water license exam 2023
Already Passed!!
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
, TCEQ class c water license exam 2023
Already Passed!!
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
A public water supply system should maintain residual pressure of 20 psi and a
minimum of normal operating pressure of - Answer 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 -
Answer 50 mg/L
Water bearing formations beneath the earths surface that are used as a source of
water for public water supplies are - Answer Aquifers
The purpose of an air line on a well is - Answer Determine Water leves in the well
The mesh size is an important feature of a well screen because properly sized
openings should - Answer Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most affected by the
- Answer pH, alkalinity, temperature, and chemical Dosage
A rapid sand filter should be backwashed When - Answer The loss of head gauge
indicated between 6 and 10 feet
Which of the following is an acceptable disinfection residual at the far reaches of the
distribution System - Answer 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine
residual when using chloramine treatment, 0.5 mg/L chloramine for surface water
supply, 0.5 mg/L free chlorine residual for ground water Supply
What is the approximate total volume of a circular tank in gallons, if it is 30 feet in
diameter, and 15 feet deep - Answer 79,300 gallons
Already Passed!!
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
, TCEQ class c water license exam 2023
Already Passed!!
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
A public water supply system should maintain residual pressure of 20 psi and a
minimum of normal operating pressure of - Answer 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 -
Answer 50 mg/L
Water bearing formations beneath the earths surface that are used as a source of
water for public water supplies are - Answer Aquifers
The purpose of an air line on a well is - Answer Determine Water leves in the well
The mesh size is an important feature of a well screen because properly sized
openings should - Answer Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most affected by the
- Answer pH, alkalinity, temperature, and chemical Dosage
A rapid sand filter should be backwashed When - Answer The loss of head gauge
indicated between 6 and 10 feet
Which of the following is an acceptable disinfection residual at the far reaches of the
distribution System - Answer 0.2 mg/L free chlorine residual, 0.8 mg/L chloramine
residual when using chloramine treatment, 0.5 mg/L chloramine for surface water
supply, 0.5 mg/L free chlorine residual for ground water Supply
What is the approximate total volume of a circular tank in gallons, if it is 30 feet in
diameter, and 15 feet deep - Answer 79,300 gallons
