TREEO Drinking Water Treatment C (Study Material
From 2023 Exam Review) – Q&A
Iron Secondary MCL (affects aesthetic quality) Correct Ans - 0.3
mg/l (red water complaints)
HAA5 MCL Correct Ans - 0.060 mg/l
Manganese Secondary MCL (affects aesthetic quality) Correct Ans -
0.05 mg/l (red water complaints)
pH Secondary MCL (affects aesthetic quality) Correct Ans - 6.5-8.5
Chloride MCL Correct Ans - 250 mg/l
TDS (Total Dissolved Solids) Secondary MCL (affects aesthetic quality)
Correct Ans - 500 mg/l
Odor Secondary MCL (affects aesthetic quality) Correct Ans - 3
TON(Threshold Odor Number)
Color Secondary MCL (affects aesthetic quality) Correct Ans - 15
units
Copper Secondary MCL (affects aesthetic quality) Correct Ans - 1.0
mg/l
Fluoride Primary MCL (direct threat to human health) Correct Ans -
4 mg/l
Lead Primary MCL (direct threat to human health) Correct Ans -
0.015 mg/l (lead poison/brain issues)
Copper Primary MCL (direct threat to human health) Correct Ans -
1.3 mg/l (Organ issues)
Total Nitrate Primary MCL (direct threat to human health) Correct Ans
- 10 mg/l (Blue Baby Syndrome/lack of oxygen)
, Turbidity Primary MCL (direct threat to human health) Correct Ans -
5.0 NTU (bacterial growth)
Total Coliform Primary MCL (direct threat to human health) Correct
Ans - No more than 1 (40 samples or less) or 5% (more than 40
samples) per month
Fluoride Secondary MCL (affects aesthetic quality) Correct Ans - 2
mg/l
Sodium Primary MCL (direct threat to human health) Correct Ans -
160 mg/l
Chlorine/Chloramines MRDL Correct Ans - 4.0 mg/l
Chlorine Dioxide MRDL Correct Ans - 0.8 mg/l
Aluminum, zinc, and magnesium are often used as anodes to prevent
corrosion to other metals. Where does aluminum, zinc and magnesium
place in the galvanic series? Correct Ans - The most active metals
In the corrosion cell, which pole is the ANODE? Correct Ans -
Positive pole
In the corrosion cell, which pole is the CATHODE? Correct Ans -
Negative pole
A lump or mound of rust on a pipe surface Correct Ans - Tubercule
The point on metal where electron activity begins and where the tubercule
forms Correct Ans - Anode
The point on metal where electrons leave the metal Correct Ans -
Cathode
The fluid that allows the flow of electrons (water in pipes) Correct Ans
- Electrolyte
From 2023 Exam Review) – Q&A
Iron Secondary MCL (affects aesthetic quality) Correct Ans - 0.3
mg/l (red water complaints)
HAA5 MCL Correct Ans - 0.060 mg/l
Manganese Secondary MCL (affects aesthetic quality) Correct Ans -
0.05 mg/l (red water complaints)
pH Secondary MCL (affects aesthetic quality) Correct Ans - 6.5-8.5
Chloride MCL Correct Ans - 250 mg/l
TDS (Total Dissolved Solids) Secondary MCL (affects aesthetic quality)
Correct Ans - 500 mg/l
Odor Secondary MCL (affects aesthetic quality) Correct Ans - 3
TON(Threshold Odor Number)
Color Secondary MCL (affects aesthetic quality) Correct Ans - 15
units
Copper Secondary MCL (affects aesthetic quality) Correct Ans - 1.0
mg/l
Fluoride Primary MCL (direct threat to human health) Correct Ans -
4 mg/l
Lead Primary MCL (direct threat to human health) Correct Ans -
0.015 mg/l (lead poison/brain issues)
Copper Primary MCL (direct threat to human health) Correct Ans -
1.3 mg/l (Organ issues)
Total Nitrate Primary MCL (direct threat to human health) Correct Ans
- 10 mg/l (Blue Baby Syndrome/lack of oxygen)
, Turbidity Primary MCL (direct threat to human health) Correct Ans -
5.0 NTU (bacterial growth)
Total Coliform Primary MCL (direct threat to human health) Correct
Ans - No more than 1 (40 samples or less) or 5% (more than 40
samples) per month
Fluoride Secondary MCL (affects aesthetic quality) Correct Ans - 2
mg/l
Sodium Primary MCL (direct threat to human health) Correct Ans -
160 mg/l
Chlorine/Chloramines MRDL Correct Ans - 4.0 mg/l
Chlorine Dioxide MRDL Correct Ans - 0.8 mg/l
Aluminum, zinc, and magnesium are often used as anodes to prevent
corrosion to other metals. Where does aluminum, zinc and magnesium
place in the galvanic series? Correct Ans - The most active metals
In the corrosion cell, which pole is the ANODE? Correct Ans -
Positive pole
In the corrosion cell, which pole is the CATHODE? Correct Ans -
Negative pole
A lump or mound of rust on a pipe surface Correct Ans - Tubercule
The point on metal where electron activity begins and where the tubercule
forms Correct Ans - Anode
The point on metal where electrons leave the metal Correct Ans -
Cathode
The fluid that allows the flow of electrons (water in pipes) Correct Ans
- Electrolyte
