Water Treatment Operator T3/2/1
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. Trihalomethanes are not formed when disinfecting with
A.) chlorine gas
B.) sodium hypochlorite
C.) chlorine dioxide
D.) sodium thiosulfate - Correct Answer: C.) Chlorine dioxide
2. According to the federal safe drinking water act, which of the following g
process could be used to provide corrosion control?
A.) pH/alkalinity adjustment
B.) Fluoridation
C.) Reverse Osmosis
D.) filtration - Correct Answer: A.) pH/alkalinity adjustment
3. What primarily determines the efficiency of the aeration process?
A.) Velocity of air flow
B.) amount of surface area contact between air and water
C.) number of splash areas
D.) mixing patterns - Correct Answer: B.) Amount of surface area
contact
,4. What three chemicals are used to oxidize trace organic affecting taste, odor,
or color?
A.) Alum, Ozone, and Chlorine
B.) chlorine, potassium permanganate, and ozone
C.) chlorine dioxide, lime, and polymer
D.) Powdered activated carbon, alum, and chlorine - Correct Answer:
B.) Chlorine, potassium permanganate, and ozone
5. Delivery of treatment chemicals and materials can pose a security risk,
which of the following is the best way to reduce a treatment plants
vulnerability?
A.) Verify the credentials of all delivery drivers
B.) check to see if the name and logo on the truck are that of the vendor
C.) only buy chemicals and supplies from known vendors
D.) restrict purchases to only goods made in the U.S - Correct
Answer: A.) Verify the credentials of all delivery drivers
6. When titrating to determine alkalinity, the moment the sample color
changes during the alkalinity titration is known as the
A.) Breakpoint
B.) Endpoint
C.) point if inflection
D.) acid point - Correct Answer: B.) endpoint
7. Changes in the residual chlorine concentration in the effluent from the
coagulation-flocculation process may indicate
A.) changes in the chlorine demand in source water
B.) changes in the hardness in source water
, C.) changes in the laboratory instruments
D.) failure of the flash mixer - Correct Answer: A.) Changes in the
chlorine demand in the source water
8. According to the federal safe drinking water act, consumer confidence
reports require that non-compliance with which of the following regulations
must be noted?
A.) iron and Manganese
B.) capacity development
C.) OSHA
D.) Treatment techniques - Correct Answer: D.) Treatment
techniques
9. According to the federal safe drinking water act Lead and Copper Rule, a
public water system on reduced sampling for lead and copper must collect
samples every?
A.) 1 month
B.) 1 Year
C.) 3 years
D.) 5 years - Correct Answer: C.) 3 years
10.According to the federal safe drinking water act, viruses are controlled by
setting?
A.) a maximum contaminant level
B.) a treatment technique
C.) a minimum detection level
D.) monitoring requirements to enumerate viruses - Correct Answer:
B.) A treatment technique
, 11.What is a potential problem that must be monitored when using granular
activated carbon as a filter media?
A.) black Water
B.) media losses
C.) filter binding
D.) early head loss - Correct Answer: B.) Media losses
12.Which of the following can be defined as the quantity of substances on the
water that are capable of neutralizing acid?
A.) Hardness
B.) pH
C.) alkalinity
D.) Langlier Index - Correct Answer: C.) Alkalinity
13.Alkalinity caused by hydroxide ions is called
A.) Carbonate Alkalinity
B.) Bicarbonate Alkalinity
C.) total Alkalinity
D.) Hydroxyl alkalinity - Correct Answer: D.) Hydroxy Alkalinity
14.Thermal overload relays in a motor starter use heater windings or coils to
monitor the
A.) ambient temperature of the controller
B.) amount of current drawn by the motor
C.) operating voltage of the motor
D.) temperature drop of the motor - Correct Answer: B.) amount of
current drawn by the motor
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. Trihalomethanes are not formed when disinfecting with
A.) chlorine gas
B.) sodium hypochlorite
C.) chlorine dioxide
D.) sodium thiosulfate - Correct Answer: C.) Chlorine dioxide
2. According to the federal safe drinking water act, which of the following g
process could be used to provide corrosion control?
A.) pH/alkalinity adjustment
B.) Fluoridation
C.) Reverse Osmosis
D.) filtration - Correct Answer: A.) pH/alkalinity adjustment
3. What primarily determines the efficiency of the aeration process?
A.) Velocity of air flow
B.) amount of surface area contact between air and water
C.) number of splash areas
D.) mixing patterns - Correct Answer: B.) Amount of surface area
contact
,4. What three chemicals are used to oxidize trace organic affecting taste, odor,
or color?
A.) Alum, Ozone, and Chlorine
B.) chlorine, potassium permanganate, and ozone
C.) chlorine dioxide, lime, and polymer
D.) Powdered activated carbon, alum, and chlorine - Correct Answer:
B.) Chlorine, potassium permanganate, and ozone
5. Delivery of treatment chemicals and materials can pose a security risk,
which of the following is the best way to reduce a treatment plants
vulnerability?
A.) Verify the credentials of all delivery drivers
B.) check to see if the name and logo on the truck are that of the vendor
C.) only buy chemicals and supplies from known vendors
D.) restrict purchases to only goods made in the U.S - Correct
Answer: A.) Verify the credentials of all delivery drivers
6. When titrating to determine alkalinity, the moment the sample color
changes during the alkalinity titration is known as the
A.) Breakpoint
B.) Endpoint
C.) point if inflection
D.) acid point - Correct Answer: B.) endpoint
7. Changes in the residual chlorine concentration in the effluent from the
coagulation-flocculation process may indicate
A.) changes in the chlorine demand in source water
B.) changes in the hardness in source water
, C.) changes in the laboratory instruments
D.) failure of the flash mixer - Correct Answer: A.) Changes in the
chlorine demand in the source water
8. According to the federal safe drinking water act, consumer confidence
reports require that non-compliance with which of the following regulations
must be noted?
A.) iron and Manganese
B.) capacity development
C.) OSHA
D.) Treatment techniques - Correct Answer: D.) Treatment
techniques
9. According to the federal safe drinking water act Lead and Copper Rule, a
public water system on reduced sampling for lead and copper must collect
samples every?
A.) 1 month
B.) 1 Year
C.) 3 years
D.) 5 years - Correct Answer: C.) 3 years
10.According to the federal safe drinking water act, viruses are controlled by
setting?
A.) a maximum contaminant level
B.) a treatment technique
C.) a minimum detection level
D.) monitoring requirements to enumerate viruses - Correct Answer:
B.) A treatment technique
, 11.What is a potential problem that must be monitored when using granular
activated carbon as a filter media?
A.) black Water
B.) media losses
C.) filter binding
D.) early head loss - Correct Answer: B.) Media losses
12.Which of the following can be defined as the quantity of substances on the
water that are capable of neutralizing acid?
A.) Hardness
B.) pH
C.) alkalinity
D.) Langlier Index - Correct Answer: C.) Alkalinity
13.Alkalinity caused by hydroxide ions is called
A.) Carbonate Alkalinity
B.) Bicarbonate Alkalinity
C.) total Alkalinity
D.) Hydroxyl alkalinity - Correct Answer: D.) Hydroxy Alkalinity
14.Thermal overload relays in a motor starter use heater windings or coils to
monitor the
A.) ambient temperature of the controller
B.) amount of current drawn by the motor
C.) operating voltage of the motor
D.) temperature drop of the motor - Correct Answer: B.) amount of
current drawn by the motor
