WATER NUGGETS PRACTICE EXAM 2.0 QUESTIONS
Chlorides, Nitrates, and DO - Answers - What should the an above ground raw water
source be tested for if a water plant gets its water from a river that is subject to a cattle
feed lot where water runs off?
pH, Iron and DO
Sulfates, Sulfuric Acid, and HAA5s
Chlorides, Nitrates, and DO
Chromium 6 and Manganese
Keep Iron Soluble in Water - Answers - Potassium permanganate and manganese
greensand are sometimes used to?
Increase the pH of raw water
Coat pipes with film to prevent corrosion
Never used together
Keep Iron Soluble in Water
Iron - Answers - Ion exchange processes can typically be used for direct groundwater
treatment as long as turbidity and what else have levels that are not excessive?
Sodium Sulfate
Carbon Dioxide
Iron
Calcium Carbonate
Cryptosporidium - Answers - What organism can escape coagulation and then pass
through a granular filter?
Cryptosporidium
Giardia
Naegleria
Entamoeba
Calcium - Answers - The injection of fluoride should be as far away as possible from
any chemical containing?
Calcium
Aluminum from Alum
,Chlorine
Soda Ash
54 Degrees Fahrenheit - Answers - A 50% solution of caustic soda will begin to
crystallize if the temperature drops below?
32 Degrees Fahrenheit
82 Degrees Fahrenheit
54 Degrees Fahrenheit
44 Degrees Fahrenheit
Destratification and Hypolimnetic Reaeration - Answers - A method to increase or
maintain the DO concentration of a thermally stratified reservoir?
Adding Copper Sulfate
Destratification and Hypolimnetic Reaeration
Adding Bluestone
Adding Alum
Polyphosphates and Chlorine - Answers - What is the best process for sequestering
manganese?
Polyphosphates Alone
Polyphosphates and Chlorine
Sodium
Sodium Silicate
800 - Answers - In pounds, how much ammonia is contained in a 1 ton cylinder that is
full?
800
1,000
1,500
2,000
Water Hardness and Langlier Index - Answers - What would have the least impact on
the efficiency of copper sulfate?
pH
Alkalinity
Water Hardness and Langlier Index
Water Temperature
, True - Answers - Shellfish grown in polluted waters have been known to contain the
organism that causes infectious hepatitis.
True
False
80 mg/L - Answers - Floc is produced when there is a chemical reaction between the
coagulant and alkalinity. If the alkalinity of raw water is too low the floc formation will be
poor. Some form of alkalinity must be added if the amount that is naturally found in the
water source is less than?
80 mg/L
100 mg/L
150 mg/L
200 mg/L
In could inhibit floc formation - Answers - What will occur if the activation process of
silica is not carefully controlled?
In could inhibit floc formation
The silica could splash due to high heat of reactants
It could deposit silica on the flocculators and the gears
It could corrode and destroy the metal and rubber in the flocculators
30 mins - Answers - What is the usual detention time required to produce optimal floc
aggregation?
30 seconds
30 mins
30 hours
30 days
Media Depth and Media Size - Answers - If a filter is operating at a normal flow rate, its
ability to trap flocculated particles is suspension is a function of?
Media Depth and Uniformity Coefficient
Effective Size Multiplied by Uniformity Coefficient
Media Depth and Media Size
Effective Size Multiplied by Uniformity Coefficient Divided by the Media Size
Chlorides, Nitrates, and DO - Answers - What should the an above ground raw water
source be tested for if a water plant gets its water from a river that is subject to a cattle
feed lot where water runs off?
pH, Iron and DO
Sulfates, Sulfuric Acid, and HAA5s
Chlorides, Nitrates, and DO
Chromium 6 and Manganese
Keep Iron Soluble in Water - Answers - Potassium permanganate and manganese
greensand are sometimes used to?
Increase the pH of raw water
Coat pipes with film to prevent corrosion
Never used together
Keep Iron Soluble in Water
Iron - Answers - Ion exchange processes can typically be used for direct groundwater
treatment as long as turbidity and what else have levels that are not excessive?
Sodium Sulfate
Carbon Dioxide
Iron
Calcium Carbonate
Cryptosporidium - Answers - What organism can escape coagulation and then pass
through a granular filter?
Cryptosporidium
Giardia
Naegleria
Entamoeba
Calcium - Answers - The injection of fluoride should be as far away as possible from
any chemical containing?
Calcium
Aluminum from Alum
,Chlorine
Soda Ash
54 Degrees Fahrenheit - Answers - A 50% solution of caustic soda will begin to
crystallize if the temperature drops below?
32 Degrees Fahrenheit
82 Degrees Fahrenheit
54 Degrees Fahrenheit
44 Degrees Fahrenheit
Destratification and Hypolimnetic Reaeration - Answers - A method to increase or
maintain the DO concentration of a thermally stratified reservoir?
Adding Copper Sulfate
Destratification and Hypolimnetic Reaeration
Adding Bluestone
Adding Alum
Polyphosphates and Chlorine - Answers - What is the best process for sequestering
manganese?
Polyphosphates Alone
Polyphosphates and Chlorine
Sodium
Sodium Silicate
800 - Answers - In pounds, how much ammonia is contained in a 1 ton cylinder that is
full?
800
1,000
1,500
2,000
Water Hardness and Langlier Index - Answers - What would have the least impact on
the efficiency of copper sulfate?
pH
Alkalinity
Water Hardness and Langlier Index
Water Temperature
, True - Answers - Shellfish grown in polluted waters have been known to contain the
organism that causes infectious hepatitis.
True
False
80 mg/L - Answers - Floc is produced when there is a chemical reaction between the
coagulant and alkalinity. If the alkalinity of raw water is too low the floc formation will be
poor. Some form of alkalinity must be added if the amount that is naturally found in the
water source is less than?
80 mg/L
100 mg/L
150 mg/L
200 mg/L
In could inhibit floc formation - Answers - What will occur if the activation process of
silica is not carefully controlled?
In could inhibit floc formation
The silica could splash due to high heat of reactants
It could deposit silica on the flocculators and the gears
It could corrode and destroy the metal and rubber in the flocculators
30 mins - Answers - What is the usual detention time required to produce optimal floc
aggregation?
30 seconds
30 mins
30 hours
30 days
Media Depth and Media Size - Answers - If a filter is operating at a normal flow rate, its
ability to trap flocculated particles is suspension is a function of?
Media Depth and Uniformity Coefficient
Effective Size Multiplied by Uniformity Coefficient
Media Depth and Media Size
Effective Size Multiplied by Uniformity Coefficient Divided by the Media Size
