Water Treatment Operator 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. Flocculation detention time for floc formation must be at least _________
minutes, with a detention time of ________ minutes being recommended.
a.) 10; 20
b.) 30; 45
c.) 30; 60
d.) 45; 90 - Correct Answer: B
2. Which of the following conditions may cause air binding of a filter?
a.) increase in the turbidity of the water during filtration
b.) decrease in the turbidity of the water during filtration
c.) release of oxygen by algae collected within the filter
d.) reduction of pressure resulting from operating under a negative head -
Correct Answer: D
3. When the fluoride electrode method is used, what buffer will adjust the pH?
a.) tempered ionic strength adjustment buffer
b.) total ionic strength adjustment buffer
,c.) tolerance inorganic strength adjustment buffer
d.) total inorganic strength alignment buffer - Correct Answer: B
4. Which is the correct type of valve for controlling the level of a treated water
storage reservoir that is below the level of the hydraulic gradient?
a.) pressure relief valve
b.) reduced pressure backflow valve
c.) altitude valve
d.) check valve - Correct Answer: C
5. Which of the following statements regarding enclosed spaces is true?
a.) Should never be entered
b.) Should be entered only by trained individuals
c.) Are only the concern of the supervisor
d.) Are not found at water treatment plants - Correct Answer: B
6. Which of the following is most effectively used to reduce scaling in reverse
osmosis?
a.) sodium hexametaphosphate
b.) sodium orthophosphate
c.) zinc orthophosphate
d.) calcium carbonate - Correct Answer: A
,7. An operator's certificate may be revoked if an operator who performs
laboratory analysis services for a water supply system when he/she
determines that the operator has prepared and/or signed reports of
laboratory analysis for the system that ____________.
a.) contain more monitoring data than required
b.) contain unsubstantiated data
c.) contain inaccurate data and are known or should be known by the operator to
be false
d.) contain unnecessary data - Correct Answer: C
8. Which one of the following is most necessary for optimum polymer dosages,
treatment, and dewatering of residuals?
a.) Bulking
b.) pH range
c.) Temperature
d.) Volume index - Correct Answer: B
9. When draining down a sedimentation basin why should all equipment be
washed down immediately?
a.) Eliminates the need to lubricate equipment
b.) High concentrations of toxic gases will be released if not washed down
c.) For aesthetic reasons only
d.) When sludge dries it is very difficult to remove - Correct Answer: D
10. Oxygen transfer rate is dependent upon
, a.) the rate of flow
b.) the size of the aerator
c.) the liquid temperature
d.) the total volume of the aeration tank - Correct Answer: B
11. ____________ are punishment for specific prohibited activities or acts of
negligence, usually in the form of fines.
a.)Actuary penalties
b.) Civil penalties
c.) Criminal penalties
d.) Retributory penalties - Correct Answer: B
12. For every one part of aluminum sulfate fed to form floc, how much calcium
hydroxide should be added?
a.) 0.035-0.05 mg/L
b.) 0.35-0.5 mg/L
c.) 1.5-3.5 mg/L
d.) 3.5-5.9 mg/L - Correct Answer: B?
13.What is the most effective way to disseminate information to the general
public in the event of an emergency?
a.) Designate one spokesperson for the system
b.) Make sure all personnel are fully informed in order to respond to questions
c.) Refer all questions to the system manager or the administrator
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. Flocculation detention time for floc formation must be at least _________
minutes, with a detention time of ________ minutes being recommended.
a.) 10; 20
b.) 30; 45
c.) 30; 60
d.) 45; 90 - Correct Answer: B
2. Which of the following conditions may cause air binding of a filter?
a.) increase in the turbidity of the water during filtration
b.) decrease in the turbidity of the water during filtration
c.) release of oxygen by algae collected within the filter
d.) reduction of pressure resulting from operating under a negative head -
Correct Answer: D
3. When the fluoride electrode method is used, what buffer will adjust the pH?
a.) tempered ionic strength adjustment buffer
b.) total ionic strength adjustment buffer
,c.) tolerance inorganic strength adjustment buffer
d.) total inorganic strength alignment buffer - Correct Answer: B
4. Which is the correct type of valve for controlling the level of a treated water
storage reservoir that is below the level of the hydraulic gradient?
a.) pressure relief valve
b.) reduced pressure backflow valve
c.) altitude valve
d.) check valve - Correct Answer: C
5. Which of the following statements regarding enclosed spaces is true?
a.) Should never be entered
b.) Should be entered only by trained individuals
c.) Are only the concern of the supervisor
d.) Are not found at water treatment plants - Correct Answer: B
6. Which of the following is most effectively used to reduce scaling in reverse
osmosis?
a.) sodium hexametaphosphate
b.) sodium orthophosphate
c.) zinc orthophosphate
d.) calcium carbonate - Correct Answer: A
,7. An operator's certificate may be revoked if an operator who performs
laboratory analysis services for a water supply system when he/she
determines that the operator has prepared and/or signed reports of
laboratory analysis for the system that ____________.
a.) contain more monitoring data than required
b.) contain unsubstantiated data
c.) contain inaccurate data and are known or should be known by the operator to
be false
d.) contain unnecessary data - Correct Answer: C
8. Which one of the following is most necessary for optimum polymer dosages,
treatment, and dewatering of residuals?
a.) Bulking
b.) pH range
c.) Temperature
d.) Volume index - Correct Answer: B
9. When draining down a sedimentation basin why should all equipment be
washed down immediately?
a.) Eliminates the need to lubricate equipment
b.) High concentrations of toxic gases will be released if not washed down
c.) For aesthetic reasons only
d.) When sludge dries it is very difficult to remove - Correct Answer: D
10. Oxygen transfer rate is dependent upon
, a.) the rate of flow
b.) the size of the aerator
c.) the liquid temperature
d.) the total volume of the aeration tank - Correct Answer: B
11. ____________ are punishment for specific prohibited activities or acts of
negligence, usually in the form of fines.
a.)Actuary penalties
b.) Civil penalties
c.) Criminal penalties
d.) Retributory penalties - Correct Answer: B
12. For every one part of aluminum sulfate fed to form floc, how much calcium
hydroxide should be added?
a.) 0.035-0.05 mg/L
b.) 0.35-0.5 mg/L
c.) 1.5-3.5 mg/L
d.) 3.5-5.9 mg/L - Correct Answer: B?
13.What is the most effective way to disseminate information to the general
public in the event of an emergency?
a.) Designate one spokesperson for the system
b.) Make sure all personnel are fully informed in order to respond to questions
c.) Refer all questions to the system manager or the administrator
