GRADE 4 WATER TREATMENT EXAM PREP
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
Which of the following should be done to a filter bed at
least once a year?
a.) Take out of service
b.) Replace
c.) Restratify
d.) Probe for gravel displacement - ANSWERS-D
What is the purpose of the underdrain of a filter?
a.) Regulate the filtration rate and backwash rate of the
filter
b.) Remove giardia and crypto that pass through the filter
media
,c.) Collect filtered water and distribute backwash water
evenly
d.) Prevent the formation of mudballs in the filter -
ANSWERS-C
What depth of anthracite must dual media high rate
filtration filters maintain in the filter beds?
a.) 10-12 inches
b.) 12-18 inches
c.) 18-20 inches
d.) 20-24 inches - ANSWERS-C
What does the maximum safe dosage of copper sulfate
depend in part on?
a.) Solubility of copper sulfate
b.) Toxic effect on fish
c.) Amount of algae present
d.) Method of dispersal - ANSWERS-B
Anabaena can cause what undesirable effect in water?
,a.) Color and decomposition
b.) Evaporation
c.) Taste and odor
d.) Hardness - ANSWERS-C
Which of the following is likely to occur during cold weather
coagulation and flocculation?
a.) Dense floc
b.) pH swings
c.) Smaller floc
d.) Failure of floc to form - ANSWERS-C
In a well operated direct filtration plant, without
disinfection, what is the giardia lamblia log removal credit?
a.) 1.0 log
b.) 2.0 log
c.) 2.5 log
d.) 3.0 log - ANSWERS-D
, The greatest safety hazard involved with the use of ferric
chloride is
a.) Corrosiveness
b.) Flammability
c.) Fume production
d.) Slippery surface - ANSWERS-B
How will a drop in the ammonia concentration in the raw
water supply affect the water treatment plant operation?
a.) More chloramines will be formed
b.) Less chlorine will be needed to reach the breakpoint
c.) Less fluoride will be required
d.) more carbon dioxide will be needed for coagulation -
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?
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+
Which of the following should be done to a filter bed at
least once a year?
a.) Take out of service
b.) Replace
c.) Restratify
d.) Probe for gravel displacement - ANSWERS-D
What is the purpose of the underdrain of a filter?
a.) Regulate the filtration rate and backwash rate of the
filter
b.) Remove giardia and crypto that pass through the filter
media
,c.) Collect filtered water and distribute backwash water
evenly
d.) Prevent the formation of mudballs in the filter -
ANSWERS-C
What depth of anthracite must dual media high rate
filtration filters maintain in the filter beds?
a.) 10-12 inches
b.) 12-18 inches
c.) 18-20 inches
d.) 20-24 inches - ANSWERS-C
What does the maximum safe dosage of copper sulfate
depend in part on?
a.) Solubility of copper sulfate
b.) Toxic effect on fish
c.) Amount of algae present
d.) Method of dispersal - ANSWERS-B
Anabaena can cause what undesirable effect in water?
,a.) Color and decomposition
b.) Evaporation
c.) Taste and odor
d.) Hardness - ANSWERS-C
Which of the following is likely to occur during cold weather
coagulation and flocculation?
a.) Dense floc
b.) pH swings
c.) Smaller floc
d.) Failure of floc to form - ANSWERS-C
In a well operated direct filtration plant, without
disinfection, what is the giardia lamblia log removal credit?
a.) 1.0 log
b.) 2.0 log
c.) 2.5 log
d.) 3.0 log - ANSWERS-D
, The greatest safety hazard involved with the use of ferric
chloride is
a.) Corrosiveness
b.) Flammability
c.) Fume production
d.) Slippery surface - ANSWERS-B
How will a drop in the ammonia concentration in the raw
water supply affect the water treatment plant operation?
a.) More chloramines will be formed
b.) Less chlorine will be needed to reach the breakpoint
c.) Less fluoride will be required
d.) more carbon dioxide will be needed for coagulation -
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?
