Water Treatment Final Exam 2025/2026
Exam Questions and Answers 100%
Guaranteed Success | Already Rated A+
Whats a rapid method of estimating total dissolved content of a water
supply? - 🧠 ANSWER ✔✔Specific conductance
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
Exam Questions and Answers 100%
Guaranteed Success | Already Rated A+
Whats a rapid method of estimating total dissolved content of a water
supply? - 🧠 ANSWER ✔✔Specific conductance
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
