TCEQ FINAL EXAM QUESTIONS AND CORRECT
ANSWERS
Fecal Coliform - CORRECT ANSWERS _____ ______ found in drinking water indicates the
water is contaminated with potentially pathogenic organisms that may be harmful
Hepatitis, typhoid, cholera, and dysentery are all waterborne diseases that are preventable with
proper disinfection. - CORRECT ANSWERS Hepatitis, typhoid, ______, and _________ are
all waterborne diseases that are preventable with proper disinfection.
Calcium Hypochlorite is a solid form of chlorine that is used by some small water systems to
maintain a chlorine residual. - CORRECT ANSWERS ______ ______ is a solid form of
chlorine that is used by some small water systems to maintain a chlorine residual.
The chlorine demand represents the amount of chlorine used by reducing agents and other
impurities before a chlorine residual is formed. - CORRECT ANSWERS The chlorine
_______ represents the amount of chlorine used by reducing agents and other impurities
before a chlorine residual is formed.
Disinfection is commonly referred to as the most important water treatment process. -
CORRECT ANSWERS __________ is commonly referred to as the most important water
treatment process.
The main component of a hypo-chlorination system is a solution feed pump. - CORRECT
ANSWERS The main component of a hypo-chlorination system is a ________ ________
pump.
Components of a chlorine gas feed system include a steel chlorine cylinder, scale and rotameter.
- CORRECT ANSWERS Components of a chlorine gas feed system include a steel chlorine
cylinder, ______, and ________.
, Under non-emergency conditions, the chlorine residual for disinfecting new or repaired water
main is ___ mg/L. - CORRECT ANSWERS Under non-emergency conditions, the chlorine
residual for disinfecting new or repaired water main is 50 mg/L.
Under emergency conditions, TCEQ allows water main disinfection to be accomplished with a
500 mg/L chlorine dose for 30 minutes. - CORRECT ANSWERS Under emergency
conditions, TCEQ allows water main disinfection to be accomplished with a ____ mg/L chlorine
dose for ___ minutes.
Most Calcium Hypochlorite (HTH) contains about 65% available chlorine. - CORRECT
ANSWERS Most Calcium Hypochlorite (HTH) contains about ___% available chlorine.
Chlorine dosage is the combination of demand plus the desired residual. - CORRECT
ANSWERS Chlorine dosage is the combination of demand plus the desired _______.
The point at which all organic compounds, ammonia, and reducing agents have reacted with the
chlorine dose is called the Breakpoint. - CORRECT ANSWERS The point at which all organic
compounds, ammonia, and reducing agents have reacted with the chlorine dose is called the
________.
After flushing and disinfecting newly installed water line, a bacteriological sample should be
collected every 1,000 feet along the new water main. - CORRECT ANSWERS After flushing
and disinfecting newly installed water line, a bacteriological sample should be collected every
_____ feet along the new water main.
Cryptosporidium is very resistant to chlorine disinfection. - CORRECT
ANSWERS _____________ is very resistant to chlorine disinfection.
1 MGD = 694.4 gpm - CORRECT ANSWERS 1 MGD = _____ gpm
ANSWERS
Fecal Coliform - CORRECT ANSWERS _____ ______ found in drinking water indicates the
water is contaminated with potentially pathogenic organisms that may be harmful
Hepatitis, typhoid, cholera, and dysentery are all waterborne diseases that are preventable with
proper disinfection. - CORRECT ANSWERS Hepatitis, typhoid, ______, and _________ are
all waterborne diseases that are preventable with proper disinfection.
Calcium Hypochlorite is a solid form of chlorine that is used by some small water systems to
maintain a chlorine residual. - CORRECT ANSWERS ______ ______ is a solid form of
chlorine that is used by some small water systems to maintain a chlorine residual.
The chlorine demand represents the amount of chlorine used by reducing agents and other
impurities before a chlorine residual is formed. - CORRECT ANSWERS The chlorine
_______ represents the amount of chlorine used by reducing agents and other impurities
before a chlorine residual is formed.
Disinfection is commonly referred to as the most important water treatment process. -
CORRECT ANSWERS __________ is commonly referred to as the most important water
treatment process.
The main component of a hypo-chlorination system is a solution feed pump. - CORRECT
ANSWERS The main component of a hypo-chlorination system is a ________ ________
pump.
Components of a chlorine gas feed system include a steel chlorine cylinder, scale and rotameter.
- CORRECT ANSWERS Components of a chlorine gas feed system include a steel chlorine
cylinder, ______, and ________.
, Under non-emergency conditions, the chlorine residual for disinfecting new or repaired water
main is ___ mg/L. - CORRECT ANSWERS Under non-emergency conditions, the chlorine
residual for disinfecting new or repaired water main is 50 mg/L.
Under emergency conditions, TCEQ allows water main disinfection to be accomplished with a
500 mg/L chlorine dose for 30 minutes. - CORRECT ANSWERS Under emergency
conditions, TCEQ allows water main disinfection to be accomplished with a ____ mg/L chlorine
dose for ___ minutes.
Most Calcium Hypochlorite (HTH) contains about 65% available chlorine. - CORRECT
ANSWERS Most Calcium Hypochlorite (HTH) contains about ___% available chlorine.
Chlorine dosage is the combination of demand plus the desired residual. - CORRECT
ANSWERS Chlorine dosage is the combination of demand plus the desired _______.
The point at which all organic compounds, ammonia, and reducing agents have reacted with the
chlorine dose is called the Breakpoint. - CORRECT ANSWERS The point at which all organic
compounds, ammonia, and reducing agents have reacted with the chlorine dose is called the
________.
After flushing and disinfecting newly installed water line, a bacteriological sample should be
collected every 1,000 feet along the new water main. - CORRECT ANSWERS After flushing
and disinfecting newly installed water line, a bacteriological sample should be collected every
_____ feet along the new water main.
Cryptosporidium is very resistant to chlorine disinfection. - CORRECT
ANSWERS _____________ is very resistant to chlorine disinfection.
1 MGD = 694.4 gpm - CORRECT ANSWERS 1 MGD = _____ gpm
