TCEQ Surface Water B License Pt.2
What is the purpose of nonionic polymers? - correct answer Filter aids
Where do humic and fulvic acids come from? - correct answer Natural Organic Matter (NOM)
decay
What can chlorine oxidize? - correct answer Iron, manganese, and microorganisms
At what pH range does iron react best? - correct answer 7.5-8.0
At what pH range does manganese oxidation occur best? - correct answer 9.0-10.0
What is required in a chlorine room with more than one 150-pound cylinder? - correct answer
High level fans and floor vents
What are the characteristics of chlorine? - correct answer Greenish-yellow gas, 2.5 times
heavier than air
At what frequency should filters be backwashed? - correct answer 100-hour run time or 6-10
feet of head loss
What is the backwash rate? - correct answer 16 gpm/ft2
What is the process for softening water? - correct answer Sodium zeolite and lime/soda ash
What is used for algae control in large bodies of water? - correct answer Copper sulfate or
potassium permanganate
, TCEQ Surface Water B License Pt.2
What is used to measure sludge? - correct answer Sludge Judge or sample taps on clarifier
What do lime and soda ash do to water? - correct answer Increase alkalinity, which increases
coagulation and removes more floc
What does higher alkalinity mean? - correct answer More floc
What is the expansion of filter bed during backwash? - correct answer 30-50%
What happens to backwash time when filter aids are used? - correct answer It is increased to
remove floc in the filter
What must be done to chlorine dioxide? - correct answer It must be generated onsite
What is the exception to ozone not producing halogenated DBP? - correct answer In bromide-
rich water
What is the most common type of hardness in water? - correct answer Calcium and magnesium
What is formed when calcium and magnesium carbonates are combined with carbon dioxide? -
correct answer Calcium and magnesium bicarbonates called carbonate hardness
What are the factors affecting hydraulic gradient? - correct answer Emergency demand,
throttled valves, pipe diameter, flows that are too small or too great
What does hard water cause? - correct answer Scale
What is the purpose of nonionic polymers? - correct answer Filter aids
Where do humic and fulvic acids come from? - correct answer Natural Organic Matter (NOM)
decay
What can chlorine oxidize? - correct answer Iron, manganese, and microorganisms
At what pH range does iron react best? - correct answer 7.5-8.0
At what pH range does manganese oxidation occur best? - correct answer 9.0-10.0
What is required in a chlorine room with more than one 150-pound cylinder? - correct answer
High level fans and floor vents
What are the characteristics of chlorine? - correct answer Greenish-yellow gas, 2.5 times
heavier than air
At what frequency should filters be backwashed? - correct answer 100-hour run time or 6-10
feet of head loss
What is the backwash rate? - correct answer 16 gpm/ft2
What is the process for softening water? - correct answer Sodium zeolite and lime/soda ash
What is used for algae control in large bodies of water? - correct answer Copper sulfate or
potassium permanganate
, TCEQ Surface Water B License Pt.2
What is used to measure sludge? - correct answer Sludge Judge or sample taps on clarifier
What do lime and soda ash do to water? - correct answer Increase alkalinity, which increases
coagulation and removes more floc
What does higher alkalinity mean? - correct answer More floc
What is the expansion of filter bed during backwash? - correct answer 30-50%
What happens to backwash time when filter aids are used? - correct answer It is increased to
remove floc in the filter
What must be done to chlorine dioxide? - correct answer It must be generated onsite
What is the exception to ozone not producing halogenated DBP? - correct answer In bromide-
rich water
What is the most common type of hardness in water? - correct answer Calcium and magnesium
What is formed when calcium and magnesium carbonates are combined with carbon dioxide? -
correct answer Calcium and magnesium bicarbonates called carbonate hardness
What are the factors affecting hydraulic gradient? - correct answer Emergency demand,
throttled valves, pipe diameter, flows that are too small or too great
What does hard water cause? - correct answer Scale
