Grade 4 Water Treatment Exam Prep Questions With
Complete Solutions
____________ 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 Answers B
A 4-log inactivation, such as with viruses, is how much
removal?
a.) 96%
b.) 99%
c.) 99.9%
d.) 99.99% Correct Answers D
A direct water connection to a high hazard chemical feeder must
be protected by a
a.) Reduced pressure zone back flow prevention valve assembly
b.) Single check valve assembly
c.) Dual check valve assembly
d.) Double check valve assembly Correct Answers A
A disinfectant residual in the distribution system cannot be
maintained if the only disinfectant agent used is
a.) chlorine dioxide
,b.) ozone
c.) a monochloramine
d.) free chlorine Correct Answers B
A one-ton cylinder of chlorine gas has developed a small leak.
The best action to take is to
a.) apply liquid lead putty over the leak area
b.) hose the cylinder off with cold water
c.) use a chlorine emergency repair kit to contain the leak
d.) read the Chlorine Institute Safety Kit Correct Answers C
A perfectly uniform sand would have a uniformity coefficient of
a.) 0
b.) 1
c.) 1.5
d.) 1.7 Correct Answers C
A tracer added to the clarifier influent is first detected in the
effluent in 15 minutes and has completely passed through the
tank in 45 minutes. What does this indicate?
a.) Settling in this tank must be exceptionally good
b.) The tank is too large for the flow being treated
c.) This test has little or no meaning
d.) Flow is passing through the tank too quickly Correct
Answers D
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.
a.) Duplicate
b.) Quadruple
c.) Single
d.) Triplicate Correct Answers A
All of the following are possible causes of under dosing fluoride
except
a.) careless lab procedures in testing for fluoride
b.) failure to verify the accuracy of the feeder calibration curve
c.) Incomplete mixing of dry chemicals ina dissolving tank
d.) higher than expected purity of fluorosilicic acid Correct
Answers D
All types of high-pressure cylinders must be properly restrained
in order to
a. Prevent the formation of condensation on the cylinder
b. Prevent damage to the cylinder, which can result in the
sudden release of its contents
c. Allow access by the operator
d. Allow identification of the chemical or gas in the cylinder.
Correct Answers B
All water quality samples submitted for microbiological
examination at the proper state lab must be examined no later
than how many hours after collection?
, a.) 12 hours
b.) 24 hours
c.) 30 hours
d.) 72 hours Correct Answers C
Ammonia addition of water is used for
a. Increasing pH
b. Maintaining chlorine residual
c. Precipitating iron
d. Reducing corrosion Correct Answers B
An operator of a treatment plant that uses the greensand filter
process is receiving complaints of brown or rust colored water.
What can be done to correct this problem?
a.) Add sodium bisulfate to the effluent
b.) Decrease the detention time
c.) increase the permanganate dose
d.) Lower the pH by adding and acid Correct Answers B
An operator receives frequent complaints of medicinal
(phenolic) tastes in water coming from the waterworks. What
method of treatment would be used to correct this problem?
a.) Fluoridation
b.) chlorine dioxide
c.) Chlorine-ammonia
d.) Superchlorination and dechlorination Correct Answers B
Complete Solutions
____________ 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 Answers B
A 4-log inactivation, such as with viruses, is how much
removal?
a.) 96%
b.) 99%
c.) 99.9%
d.) 99.99% Correct Answers D
A direct water connection to a high hazard chemical feeder must
be protected by a
a.) Reduced pressure zone back flow prevention valve assembly
b.) Single check valve assembly
c.) Dual check valve assembly
d.) Double check valve assembly Correct Answers A
A disinfectant residual in the distribution system cannot be
maintained if the only disinfectant agent used is
a.) chlorine dioxide
,b.) ozone
c.) a monochloramine
d.) free chlorine Correct Answers B
A one-ton cylinder of chlorine gas has developed a small leak.
The best action to take is to
a.) apply liquid lead putty over the leak area
b.) hose the cylinder off with cold water
c.) use a chlorine emergency repair kit to contain the leak
d.) read the Chlorine Institute Safety Kit Correct Answers C
A perfectly uniform sand would have a uniformity coefficient of
a.) 0
b.) 1
c.) 1.5
d.) 1.7 Correct Answers C
A tracer added to the clarifier influent is first detected in the
effluent in 15 minutes and has completely passed through the
tank in 45 minutes. What does this indicate?
a.) Settling in this tank must be exceptionally good
b.) The tank is too large for the flow being treated
c.) This test has little or no meaning
d.) Flow is passing through the tank too quickly Correct
Answers D
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.
a.) Duplicate
b.) Quadruple
c.) Single
d.) Triplicate Correct Answers A
All of the following are possible causes of under dosing fluoride
except
a.) careless lab procedures in testing for fluoride
b.) failure to verify the accuracy of the feeder calibration curve
c.) Incomplete mixing of dry chemicals ina dissolving tank
d.) higher than expected purity of fluorosilicic acid Correct
Answers D
All types of high-pressure cylinders must be properly restrained
in order to
a. Prevent the formation of condensation on the cylinder
b. Prevent damage to the cylinder, which can result in the
sudden release of its contents
c. Allow access by the operator
d. Allow identification of the chemical or gas in the cylinder.
Correct Answers B
All water quality samples submitted for microbiological
examination at the proper state lab must be examined no later
than how many hours after collection?
, a.) 12 hours
b.) 24 hours
c.) 30 hours
d.) 72 hours Correct Answers C
Ammonia addition of water is used for
a. Increasing pH
b. Maintaining chlorine residual
c. Precipitating iron
d. Reducing corrosion Correct Answers B
An operator of a treatment plant that uses the greensand filter
process is receiving complaints of brown or rust colored water.
What can be done to correct this problem?
a.) Add sodium bisulfate to the effluent
b.) Decrease the detention time
c.) increase the permanganate dose
d.) Lower the pH by adding and acid Correct Answers B
An operator receives frequent complaints of medicinal
(phenolic) tastes in water coming from the waterworks. What
method of treatment would be used to correct this problem?
a.) Fluoridation
b.) chlorine dioxide
c.) Chlorine-ammonia
d.) Superchlorination and dechlorination Correct Answers B
