In a pumping station where two complete pumping units are provided, how much should a
pump be capable of delivering?
a.) Average Flow
b.) Maximum Flow
c.) 1/2 the average flow
d.) 1/2 maximum flow - ANSWER A
When there is insufficient alkalinity present in water to react with the coagulant, alkalinity
should be supplied by
a.) Adding Lime
b.) Adding Turbidity
c.) Reducing plant flow
d.) Removing carbon dioxide - ANSWER A
Chlorine dioxide is generated on-site by the reaction of chlorine with what chemical?
a.) Oxygen
b.) Sodium Chlorite
c.) Salt Brine
d.) Carbon - ANSWER B
Why is carbon dioxide primarily used in the stabilization process?
1
,a.) Decrease pH
b.) Increase pH
c.) Tie up scale forming ions
d.) Form a protective coating - ANSWER A
If fluoride is fed ahead of filtration what can occur?
a.) Some fluoride loss
b.) Problems with disinfection
c.) Increases in fluoride concentration
d.) Formation of precipitate - ANSWER A
Which of the following emergency leak repair kits should be on hand for ton cylinders?
a.) Emergency Kit A
b.) Emergency Kit B
c.) Emergency Kit C
d.) Emergency Kit D - ANSWER B
What will iron that remains in the ferrous state do?
a.) Be removed by filters
b.) Pass through the filters
c.) Precipitate in the reaction tank
d.) Settle out - ANSWER B
2
,Short circuiting in the flocculation process can be corrected by
a.) Adjusting the pH
b.) Decreasing the flows
c.) Increasing coagulant dosages
d.) Providing several compartments in series - ANSWER D
What removes organic substances from depleted activated carbon?
a.) Degasification
b.) Recarbonation
c.) Reduction
d.) Reactivation - ANSWER D
What is the purpose of an anti-siphon valve on a fluoride metering pump?
a.) The same as that of the overflow connection on the supply
b.) To prevent fluoridated water from being siphoned into the feed equipment
c.) To prevent potential overfeed of fluoride
d.) The same as that of a vacuum breaker on the potable makeup water line - ANSWER B
A perfectly uniform sand would have a uniformity coefficient of
a.) 0
b.) 1
c.) 1.5
d.) 1.7 - ANSWER C
3
, When handling any dry fluoride compound one important safety precaution that should be
observed is to
a.) Have another operator near by
b.) Keep all windows closed to prevent the escape of dangerous dusts into the environment
c.) Keep skin contact with fluoride dusts to a minimum
d.) Use only explosion proof fixtures - ANSWER C
What calcium carbonate condition should be maintained for a good calcium carbonate coat-
ing in piping?
a.) Undersaturated
b.) Just saturated
c.) Oversaturated
d.) That which is indicated by the corrosion indices - ANSWER B
The free chlorine residual in the water entering the distribution system cannot be less than
what level for more than 4 hours?
a.) 0.1 mg/L
b.) 0.2 mg/L
c.) 1.0 mg/L
d.) 2.o mg/L - ANSWER B
All community public water systems serving more than 50 service connections and which
have their own source of water are required to install, operate, and maintain
_____________ disinfection equipment.
4
pump be capable of delivering?
a.) Average Flow
b.) Maximum Flow
c.) 1/2 the average flow
d.) 1/2 maximum flow - ANSWER A
When there is insufficient alkalinity present in water to react with the coagulant, alkalinity
should be supplied by
a.) Adding Lime
b.) Adding Turbidity
c.) Reducing plant flow
d.) Removing carbon dioxide - ANSWER A
Chlorine dioxide is generated on-site by the reaction of chlorine with what chemical?
a.) Oxygen
b.) Sodium Chlorite
c.) Salt Brine
d.) Carbon - ANSWER B
Why is carbon dioxide primarily used in the stabilization process?
1
,a.) Decrease pH
b.) Increase pH
c.) Tie up scale forming ions
d.) Form a protective coating - ANSWER A
If fluoride is fed ahead of filtration what can occur?
a.) Some fluoride loss
b.) Problems with disinfection
c.) Increases in fluoride concentration
d.) Formation of precipitate - ANSWER A
Which of the following emergency leak repair kits should be on hand for ton cylinders?
a.) Emergency Kit A
b.) Emergency Kit B
c.) Emergency Kit C
d.) Emergency Kit D - ANSWER B
What will iron that remains in the ferrous state do?
a.) Be removed by filters
b.) Pass through the filters
c.) Precipitate in the reaction tank
d.) Settle out - ANSWER B
2
,Short circuiting in the flocculation process can be corrected by
a.) Adjusting the pH
b.) Decreasing the flows
c.) Increasing coagulant dosages
d.) Providing several compartments in series - ANSWER D
What removes organic substances from depleted activated carbon?
a.) Degasification
b.) Recarbonation
c.) Reduction
d.) Reactivation - ANSWER D
What is the purpose of an anti-siphon valve on a fluoride metering pump?
a.) The same as that of the overflow connection on the supply
b.) To prevent fluoridated water from being siphoned into the feed equipment
c.) To prevent potential overfeed of fluoride
d.) The same as that of a vacuum breaker on the potable makeup water line - ANSWER B
A perfectly uniform sand would have a uniformity coefficient of
a.) 0
b.) 1
c.) 1.5
d.) 1.7 - ANSWER C
3
, When handling any dry fluoride compound one important safety precaution that should be
observed is to
a.) Have another operator near by
b.) Keep all windows closed to prevent the escape of dangerous dusts into the environment
c.) Keep skin contact with fluoride dusts to a minimum
d.) Use only explosion proof fixtures - ANSWER C
What calcium carbonate condition should be maintained for a good calcium carbonate coat-
ing in piping?
a.) Undersaturated
b.) Just saturated
c.) Oversaturated
d.) That which is indicated by the corrosion indices - ANSWER B
The free chlorine residual in the water entering the distribution system cannot be less than
what level for more than 4 hours?
a.) 0.1 mg/L
b.) 0.2 mg/L
c.) 1.0 mg/L
d.) 2.o mg/L - ANSWER B
All community public water systems serving more than 50 service connections and which
have their own source of water are required to install, operate, and maintain
_____________ disinfection equipment.
4
