NC Water Operator Certification C questions and
answers already passed
1. Langelier Index Corrosivity of water. An index reflecting the equilibrium pH of a water
with respect to calcium and alkalinity. pH-pHs
2. Galvanic Cell An electrolytic cell capable of producing electric energy by
electrochemical action. The decomposition of materials in the cell
causes an electric (electron) current to flow from cathode to anode.
3. Amperage the strength of an electric current in amperes.
4. coupon a steel specimen inserted into water or wastewater to measure
corrosiveness.
5. NPDES permit National Pollutant Discharge Elimination System permit is the
regulatory agency document issued by either a federal or state
agency that is designed to control all discharges of potential pollutants.
6. Electrolyte cell device in which the chemical decomposition of material causes an
electric current to flow
7. KMnO4 Potassium permanganate
8. Fe Iron (ferrum)
9. Pb Lead (plumbum)
10. Cu Copper (cuprum)
11. How many 5 years
years does
Bacterio- logical
records needs
to be kept?
12. Minimum of 3 years
,NC Water Operator Certification C questions and
answers already passed
How many years
should monthly
reports be
kept?
years
13. How many
years should
Chemical
Analysis
reports be
kept?
years
14. Operators who
allow their li-
cense to lapse
can reapply
after how long?
15. Chlorine gas is times more heavier
how much
heav- ier than
air?
16. In chlorine inches from floor
room,
ventilation
should be no
more than how
far from floor?
17. From liquid to
gas, what is the
liter to 460 liters
expansion rate
of chlorine?
18. The fusible
plug on a
chlorine 156F - 165F (70C-76C)
cylinder melts
,NC Water Operator Certification C questions and
answers already passed
at approximately what temperature?
19. Water turns potassium permanganate
pink when
there is too
much of this
chemical
20. A jar test is
used to The dosage and ettectiveness of a coagulant and polymers
determine...?
21. THM Trihalomethane
22. What are THMs? unwanted and undesirable compounds formed by reactions between
chlorine
and certain organics
23. air scour mudballs
pre- vents
what?
24. pH scale scale with values from 0 to 14, used to measure the concentration of H+
ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a
pH of 7 to 14 is basic
25. Benching A method of protecting workers from cave-ins by excavating the sides of a
excavation to form one or a series of horizontal levels or steps, usually with
vertical or near-vertical surfaces between levels.
answers already passed
1. Langelier Index Corrosivity of water. An index reflecting the equilibrium pH of a water
with respect to calcium and alkalinity. pH-pHs
2. Galvanic Cell An electrolytic cell capable of producing electric energy by
electrochemical action. The decomposition of materials in the cell
causes an electric (electron) current to flow from cathode to anode.
3. Amperage the strength of an electric current in amperes.
4. coupon a steel specimen inserted into water or wastewater to measure
corrosiveness.
5. NPDES permit National Pollutant Discharge Elimination System permit is the
regulatory agency document issued by either a federal or state
agency that is designed to control all discharges of potential pollutants.
6. Electrolyte cell device in which the chemical decomposition of material causes an
electric current to flow
7. KMnO4 Potassium permanganate
8. Fe Iron (ferrum)
9. Pb Lead (plumbum)
10. Cu Copper (cuprum)
11. How many 5 years
years does
Bacterio- logical
records needs
to be kept?
12. Minimum of 3 years
,NC Water Operator Certification C questions and
answers already passed
How many years
should monthly
reports be
kept?
years
13. How many
years should
Chemical
Analysis
reports be
kept?
years
14. Operators who
allow their li-
cense to lapse
can reapply
after how long?
15. Chlorine gas is times more heavier
how much
heav- ier than
air?
16. In chlorine inches from floor
room,
ventilation
should be no
more than how
far from floor?
17. From liquid to
gas, what is the
liter to 460 liters
expansion rate
of chlorine?
18. The fusible
plug on a
chlorine 156F - 165F (70C-76C)
cylinder melts
,NC Water Operator Certification C questions and
answers already passed
at approximately what temperature?
19. Water turns potassium permanganate
pink when
there is too
much of this
chemical
20. A jar test is
used to The dosage and ettectiveness of a coagulant and polymers
determine...?
21. THM Trihalomethane
22. What are THMs? unwanted and undesirable compounds formed by reactions between
chlorine
and certain organics
23. air scour mudballs
pre- vents
what?
24. pH scale scale with values from 0 to 14, used to measure the concentration of H+
ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a
pH of 7 to 14 is basic
25. Benching A method of protecting workers from cave-ins by excavating the sides of a
excavation to form one or a series of horizontal levels or steps, usually with
vertical or near-vertical surfaces between levels.
