Water Treatment – ADEQ T1 Prep
Comprehensive Resource To Help You Ace 2026-2027
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update
1. Why is fluoride added to drinking water? - Correct Answer: to prevent
tooth decay
2. Which chemicals can be used as sources of fluoride? - Correct Answer:
Fluorosilicic acid, silica fluoride, and sodium fluoride
3. What is the optimum concentration of fluoride in water?
A. 0.2-0.4 mg/l
B. 0.8-1.2 mg/l
C. 2.0-4.0 mg/l
D. 8.0-12.0 mg/l - Correct Answer: B. 0.8-1.2 mg/l
4. What factor is used to determine the optimum dosage of fluoride?
A. Air temperature
B. Water temperature
C. Fluoride solution temperature
D. pH - Correct Answer: A. Air temperature
,5. What type of equipment would be used to feed liquid fluoride? -
Correct Answer: Solution feeders
6. Why is fluoride an inorganic primary contaminant? - Correct Answer:
Causes adverse health effects. Makes bone harder and brittle
7. What is the name of the lab analysis for fluoride residual? - Correct
Answer: The SPADNS Method
8. Liquid fluoride is delivered as:
A. Sodium Fluoride
B. Hydrofluorosilicic acid
C. Sodium Silicofluoride - Correct Answer: B. Hydrofluorosilicic acid
9. What are the 3 types of aquifers? - Correct Answer: Unconfined
10.Perched
11.Artesian (confined)
12.What is transpiration? - Correct Answer: Plants giving water vapor to
the atmosphere
13.What is a GWUDI water supply? - Correct Answer: Groundwater
touching surface water
14.The best quality water is usually found where in a lake? - Correct
Answer: Thermocline
,15.True or False: Turnover in a lake is caused by changes in the specific gravity
of water. - Correct Answer: True
16.The specific gravity of water is highest at:
A. 32 F or 0 C
B. 39 F or 4 C
C. 72 F or 20 C - Correct Answer: B. 39 F or 4 C
17.One of the problems found in water taken from the bottom of a lake might
be:
A. Higher mineral concentrations
B. Tastes and odors
C. Less dissolved oxygen
D. Different temperature - Correct Answer: A. Higher mineral
concentrations
18.What is non-point source pollution? - Correct Answer: Pollution where
source is unknown
19.What is the disadvantage of pointing a river intake directly downstream? -
Correct Answer: Low pressure zone created from high flows
20.What should be done when the surface water quality changes? -
Correct Answer: Jar test
, 21.What is subsidence? - Correct Answer: Water mining lowering the water
table
22.What is a thermocline? - Correct Answer: Where lake temperature goes
from warm to cold.
23.Runoff after a fire can result in:
A. Point source pollution
B. Non-Point source pollution
C. Point of entry pollution
D. Creation of a thermocline - Correct Answer: B. Non-Point source
pollution
24.Some metal concentrations will be higher at the bottom of the lake
because:
A. Metals sink to the bottom
B. The water is heavier at the bottom
C. They are oxidized at the top
D. Debris at the bottom is decomposing - Correct Answer: C. They
are oxidized at the top
25.The relationship between the flow and the drawdown is called:
A. Radius of influence
B. Cone of depression
C. Specific capacity
D. Total yield - Correct Answer: C. Specific capacity
Comprehensive Resource To Help You Ace 2026-2027
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update
1. Why is fluoride added to drinking water? - Correct Answer: to prevent
tooth decay
2. Which chemicals can be used as sources of fluoride? - Correct Answer:
Fluorosilicic acid, silica fluoride, and sodium fluoride
3. What is the optimum concentration of fluoride in water?
A. 0.2-0.4 mg/l
B. 0.8-1.2 mg/l
C. 2.0-4.0 mg/l
D. 8.0-12.0 mg/l - Correct Answer: B. 0.8-1.2 mg/l
4. What factor is used to determine the optimum dosage of fluoride?
A. Air temperature
B. Water temperature
C. Fluoride solution temperature
D. pH - Correct Answer: A. Air temperature
,5. What type of equipment would be used to feed liquid fluoride? -
Correct Answer: Solution feeders
6. Why is fluoride an inorganic primary contaminant? - Correct Answer:
Causes adverse health effects. Makes bone harder and brittle
7. What is the name of the lab analysis for fluoride residual? - Correct
Answer: The SPADNS Method
8. Liquid fluoride is delivered as:
A. Sodium Fluoride
B. Hydrofluorosilicic acid
C. Sodium Silicofluoride - Correct Answer: B. Hydrofluorosilicic acid
9. What are the 3 types of aquifers? - Correct Answer: Unconfined
10.Perched
11.Artesian (confined)
12.What is transpiration? - Correct Answer: Plants giving water vapor to
the atmosphere
13.What is a GWUDI water supply? - Correct Answer: Groundwater
touching surface water
14.The best quality water is usually found where in a lake? - Correct
Answer: Thermocline
,15.True or False: Turnover in a lake is caused by changes in the specific gravity
of water. - Correct Answer: True
16.The specific gravity of water is highest at:
A. 32 F or 0 C
B. 39 F or 4 C
C. 72 F or 20 C - Correct Answer: B. 39 F or 4 C
17.One of the problems found in water taken from the bottom of a lake might
be:
A. Higher mineral concentrations
B. Tastes and odors
C. Less dissolved oxygen
D. Different temperature - Correct Answer: A. Higher mineral
concentrations
18.What is non-point source pollution? - Correct Answer: Pollution where
source is unknown
19.What is the disadvantage of pointing a river intake directly downstream? -
Correct Answer: Low pressure zone created from high flows
20.What should be done when the surface water quality changes? -
Correct Answer: Jar test
, 21.What is subsidence? - Correct Answer: Water mining lowering the water
table
22.What is a thermocline? - Correct Answer: Where lake temperature goes
from warm to cold.
23.Runoff after a fire can result in:
A. Point source pollution
B. Non-Point source pollution
C. Point of entry pollution
D. Creation of a thermocline - Correct Answer: B. Non-Point source
pollution
24.Some metal concentrations will be higher at the bottom of the lake
because:
A. Metals sink to the bottom
B. The water is heavier at the bottom
C. They are oxidized at the top
D. Debris at the bottom is decomposing - Correct Answer: C. They
are oxidized at the top
25.The relationship between the flow and the drawdown is called:
A. Radius of influence
B. Cone of depression
C. Specific capacity
D. Total yield - Correct Answer: C. Specific capacity
