FDEP Water Treatment C Exam Graded A+
A commonly used method to test for chlorine residual in water is called the _____
method.
a. HTH
b. THM
c. VOC
d. DPD - ANSWER-DPD
A high level of ______ in the water can cause the "blue-baby" syndrome - ANSWER-
Nitrates
According to the safe water drinking act, the basic definition of public water supply
system is any water system that supplies water for human consumption that serves: -
ANSWER-15 service connections or over 25 persons for over 60 days a year
After a jar test is completed, what does a hazy settled water indicate? - ANSWER-Poor
coagulation
Alkalinity consist predominately in which of the following forms?
Bicarbonate, carbonate, and hydroxide
carbon dioxide and bicarbonate
carbonate and carbon dioxide
carbonate, carbon dioxide, and bicarbonate - ANSWER-Bicarbonate, carbonate, and
hydroxide
Always add acid to water, never the reverse. - ANSWER-True
An alkalinity determination is needed when calculating chemical doses used in what
water treatment processes?
1) coagulation
2) filtration
3) flocculation
4) settling
5) softening - ANSWER-1,5
Baffling inside a storage facility may be needed to prevent "hot spots" and
a. straight through flows
b. long contact times with disinfectants
c. high chlorine residuals throughout the facility
d. high temperatures throughout the storage facility - ANSWER-straight through flows
Calcium hypochlorite (Ca(OCl)2) - ANSWER-granular Chlorine , Available Chlorine 40-
78%
, Chlorine expands approximately how many times from liquid to gas? - ANSWER-450
Completely empty volumetric pipets by blowing out the small amount remaining in the
tip - ANSWER-false
Federal laws include sludge from a water treatment plant as an industrial waste and
require proper handling and disposal. - ANSWER-true
Filters are generally backwashed when the loss-of-head indicator registers a certain set
value, such as 6-ft, or upon a certain time, say 48-hours, or upon a rise in - ANSWER-
turbidity
Following the softening process, the pH is high and the water is _____ with excess
caustic alkalinity in either the hydroxide or carbonate form. - ANSWER-Supersaturated
free available residual chlorine has the highest disinfection ability? - ANSWER-True
grab sampler - ANSWER-a single sample of water collected at a particular time and
place which represents the composition of the water only at a time and place
Groundwaters generally have consistent water quality that include
a. having a higher total dissolved solids content than surface water
b. having a lower mineral content than surface waters
c. having lower pH values than surface waters
d. having a higher amount of bacteria than surface waters - ANSWER-having a higher
total dissolved solids content than surface wate
Hard water contains an abundance of
a. sodium
b. iron
c. lead
d. calcium carbonate - ANSWER-calcium carbonate
How are filter production(capacity) rates measured? - ANSWER-Filter
production(capacity) are measured MGD (Million Gallons per Day)
How are ORP probes used in the disinfection process? - ANSWER-ORP (Oxidation-
reduction potential) probes provide a direct measure of the disinfecting power of the
disinfectant
How can an operator determine if a filter is not completely clean after backwashing? -
ANSWER-initial head loss is too high, next filter run is too low
How can an operator tell if a filter is NOT completely cleaned after backwashing -
ANSWER-the initial headloss is on the high side
A commonly used method to test for chlorine residual in water is called the _____
method.
a. HTH
b. THM
c. VOC
d. DPD - ANSWER-DPD
A high level of ______ in the water can cause the "blue-baby" syndrome - ANSWER-
Nitrates
According to the safe water drinking act, the basic definition of public water supply
system is any water system that supplies water for human consumption that serves: -
ANSWER-15 service connections or over 25 persons for over 60 days a year
After a jar test is completed, what does a hazy settled water indicate? - ANSWER-Poor
coagulation
Alkalinity consist predominately in which of the following forms?
Bicarbonate, carbonate, and hydroxide
carbon dioxide and bicarbonate
carbonate and carbon dioxide
carbonate, carbon dioxide, and bicarbonate - ANSWER-Bicarbonate, carbonate, and
hydroxide
Always add acid to water, never the reverse. - ANSWER-True
An alkalinity determination is needed when calculating chemical doses used in what
water treatment processes?
1) coagulation
2) filtration
3) flocculation
4) settling
5) softening - ANSWER-1,5
Baffling inside a storage facility may be needed to prevent "hot spots" and
a. straight through flows
b. long contact times with disinfectants
c. high chlorine residuals throughout the facility
d. high temperatures throughout the storage facility - ANSWER-straight through flows
Calcium hypochlorite (Ca(OCl)2) - ANSWER-granular Chlorine , Available Chlorine 40-
78%
, Chlorine expands approximately how many times from liquid to gas? - ANSWER-450
Completely empty volumetric pipets by blowing out the small amount remaining in the
tip - ANSWER-false
Federal laws include sludge from a water treatment plant as an industrial waste and
require proper handling and disposal. - ANSWER-true
Filters are generally backwashed when the loss-of-head indicator registers a certain set
value, such as 6-ft, or upon a certain time, say 48-hours, or upon a rise in - ANSWER-
turbidity
Following the softening process, the pH is high and the water is _____ with excess
caustic alkalinity in either the hydroxide or carbonate form. - ANSWER-Supersaturated
free available residual chlorine has the highest disinfection ability? - ANSWER-True
grab sampler - ANSWER-a single sample of water collected at a particular time and
place which represents the composition of the water only at a time and place
Groundwaters generally have consistent water quality that include
a. having a higher total dissolved solids content than surface water
b. having a lower mineral content than surface waters
c. having lower pH values than surface waters
d. having a higher amount of bacteria than surface waters - ANSWER-having a higher
total dissolved solids content than surface wate
Hard water contains an abundance of
a. sodium
b. iron
c. lead
d. calcium carbonate - ANSWER-calcium carbonate
How are filter production(capacity) rates measured? - ANSWER-Filter
production(capacity) are measured MGD (Million Gallons per Day)
How are ORP probes used in the disinfection process? - ANSWER-ORP (Oxidation-
reduction potential) probes provide a direct measure of the disinfecting power of the
disinfectant
How can an operator determine if a filter is not completely clean after backwashing? -
ANSWER-initial head loss is too high, next filter run is too low
How can an operator tell if a filter is NOT completely cleaned after backwashing -
ANSWER-the initial headloss is on the high side
