WATER TREATMENT GRADE 1 EXAMINATION
TEST SOLVED QUESTIONS AND COURSE
NOTES GRADED A+ 2026.
◍ Waterfall aeration devices may cause what type of problems?
Answer: Encourage biological growth
◍ If a person is poisoned by inhaling fluoride what is the first
symptom? Answer: Sharp biting pain to the nose followed by a runny
nose or a nose bleed
◍ Drinking water waste is considered what type of waste? Answer:
Industrial
◍ pH kept at ____ will precipitate calcium carbonate? Answer: 10
◍ Excess pink water can be caused by what? Answer: Potassium
permanganate overdose
◍ Pressure in a distribution system should not fall below what level?
Answer: 20psi
◍ What is the MCL for Trihalomethanes Answer: 0.08 milligrams
per liter
, ◍ Shortened filter runs can occur because of air bound filters, why is
this? Answer: Caused by the release of dissolved air in saturated cold
water due to a decrease in pressure
◍ What is the most expensive aeration device? Answer: Mechanical
◍ In the Ion exchange process, calcium(Ca) and magnesium(Mg)
Ions are exchanged for what? Answer: Na- Ions
◍ What are the four stages of the operation of an ion exchange
softener? Answer: Service, Brine, Backwash, Rinse
◍ What is the chief cause of accidents? Answer: Carelessness/
negligence
◍ Drinking water should be free of what 2 things? Answer: Bacteria
and toxins
◍ Ton tanks have how many fusible metal safety plugs on each ends?
Answer: 3 to 4- each side
◍ If you have positive sample for total coliform, do what? Answer:
Repeat samples are required (3) tap upstream and downstream
, ◍ Filters are clogged by what, that can cause head loss? Answer:
Algae/ aquatic micro organisms
◍ What is the meaning of eutrophic Answer: High nutrient content
◍ What is a bubbler tube used for? Answer: Measuring the depths of
a well
◍ What is the primary advantage of vacuum system chlorination?
Answer: Safety
◍ When chlorine and ammonia are added to water what is formed?
Answer: Chloramines
◍ What is tapered energy mixing? Answer: Reduction of speed or
surface area of the paddle or basin
◍ What is the best appearance of a floc particle? Answer: Discrete
(separate) fairly dense
◍ What is a cross connection? Answer: Connection between a
drinking water supply and a unapproved water supply
◍ What is the meaning of MCL? Answer: Maximum contaminant
level, (largest allowable amount)
TEST SOLVED QUESTIONS AND COURSE
NOTES GRADED A+ 2026.
◍ Waterfall aeration devices may cause what type of problems?
Answer: Encourage biological growth
◍ If a person is poisoned by inhaling fluoride what is the first
symptom? Answer: Sharp biting pain to the nose followed by a runny
nose or a nose bleed
◍ Drinking water waste is considered what type of waste? Answer:
Industrial
◍ pH kept at ____ will precipitate calcium carbonate? Answer: 10
◍ Excess pink water can be caused by what? Answer: Potassium
permanganate overdose
◍ Pressure in a distribution system should not fall below what level?
Answer: 20psi
◍ What is the MCL for Trihalomethanes Answer: 0.08 milligrams
per liter
, ◍ Shortened filter runs can occur because of air bound filters, why is
this? Answer: Caused by the release of dissolved air in saturated cold
water due to a decrease in pressure
◍ What is the most expensive aeration device? Answer: Mechanical
◍ In the Ion exchange process, calcium(Ca) and magnesium(Mg)
Ions are exchanged for what? Answer: Na- Ions
◍ What are the four stages of the operation of an ion exchange
softener? Answer: Service, Brine, Backwash, Rinse
◍ What is the chief cause of accidents? Answer: Carelessness/
negligence
◍ Drinking water should be free of what 2 things? Answer: Bacteria
and toxins
◍ Ton tanks have how many fusible metal safety plugs on each ends?
Answer: 3 to 4- each side
◍ If you have positive sample for total coliform, do what? Answer:
Repeat samples are required (3) tap upstream and downstream
, ◍ Filters are clogged by what, that can cause head loss? Answer:
Algae/ aquatic micro organisms
◍ What is the meaning of eutrophic Answer: High nutrient content
◍ What is a bubbler tube used for? Answer: Measuring the depths of
a well
◍ What is the primary advantage of vacuum system chlorination?
Answer: Safety
◍ When chlorine and ammonia are added to water what is formed?
Answer: Chloramines
◍ What is tapered energy mixing? Answer: Reduction of speed or
surface area of the paddle or basin
◍ What is the best appearance of a floc particle? Answer: Discrete
(separate) fairly dense
◍ What is a cross connection? Answer: Connection between a
drinking water supply and a unapproved water supply
◍ What is the meaning of MCL? Answer: Maximum contaminant
level, (largest allowable amount)
