State of Florida "B" Water Operator - Practice Questions
With Complete Solutions
__________ would lead to the least amount of thihalomethane
formation. Correct Answers low Ph
_____________ is recommended for corrosion control in waters
with low alkalinity Correct Answers ca(oh)2
________________ is not a solution for corrosion problems
Correct Answers dissolved oxygen saturation
_________________ inhibits corrosion by forming a film on the
interior of water pipes. Correct Answers calcium carbonate
__________________ is used to remove noncarbonate hardness
in chemical precipitation. Correct Answers sodium carbonate
___________________ has the greatest potential for being
corrosive. Correct Answers a soft water with low alkalinity, low
Ph, and low mineral content (tds)
a disadvantage of using chlorine dioxide as a disinfectant is:
Correct Answers its preparation requires handling sodium
chlorite.
a filter becomes air bound: Correct Answers by the release of of
dissolved air in saturated, cold water
,A jar test indicates that 80% of the floc is settling out 2 minutes
after the mixer is turned off. expect: Correct Answers floc to
prematurely settle out
a langlier index of 0 or a driving force index of 1 indicates the
water is: Correct Answers saturated
a major limitation of using a chloramine residual is the fact that
chloramines: Correct Answers are not as effective as free
chlorine
a positive langlier index is an indicator that the water is: Correct
Answers scale forming
a primary coagulant used only in water softening process is :
Correct Answers calcium hydroxide
a problem that may be created when floc that reaches a filter
becomes too large: Correct Answers rapid clogging of media
surface
a reasonable detention time for flocculation in a conventional
filtration plant is : Correct Answers 30 min
a volume over volume test indicates a percent solids
concentration of 2% for the slurry in the reaction zone of your
solids contact unit, this means: Correct Answers the solids
concentration is too low (should be 5 - 20 %)
, after backwashing, excessive head loss remains through the
filter. what should be checked? Correct Answers under drain
system and head loss measuring equipment
after backwashing, excessive head loss remains through the
filter. What should be checked? Correct Answers under drain
system and head loss measuring equipment
air bound filters are caused by : Correct Answers release of
dissolved air in saturated cold water
air bound filters will occur when: Correct Answers head loss
exceeds the head of water over the media
alum floc carried over into the launders will cause: Correct
Answers short filter runs and premature filter clogging
an indicator that too much chemical has beed added by
observance of the floc is when 80% or more of the floc has
settled within: Correct Answers 1-2 minutes
an operator an evaluate the backwash process by observing the:
Correct Answers clarity of the waste water at the end of the
backwash cycle.
an underground layer of rock or soil that permeates the passage
of water is called what? Correct Answers an aquifer
an uneven distribution of floc in the flocculation basin is usually
an indication of: Correct Answers short circuiting
With Complete Solutions
__________ would lead to the least amount of thihalomethane
formation. Correct Answers low Ph
_____________ is recommended for corrosion control in waters
with low alkalinity Correct Answers ca(oh)2
________________ is not a solution for corrosion problems
Correct Answers dissolved oxygen saturation
_________________ inhibits corrosion by forming a film on the
interior of water pipes. Correct Answers calcium carbonate
__________________ is used to remove noncarbonate hardness
in chemical precipitation. Correct Answers sodium carbonate
___________________ has the greatest potential for being
corrosive. Correct Answers a soft water with low alkalinity, low
Ph, and low mineral content (tds)
a disadvantage of using chlorine dioxide as a disinfectant is:
Correct Answers its preparation requires handling sodium
chlorite.
a filter becomes air bound: Correct Answers by the release of of
dissolved air in saturated, cold water
,A jar test indicates that 80% of the floc is settling out 2 minutes
after the mixer is turned off. expect: Correct Answers floc to
prematurely settle out
a langlier index of 0 or a driving force index of 1 indicates the
water is: Correct Answers saturated
a major limitation of using a chloramine residual is the fact that
chloramines: Correct Answers are not as effective as free
chlorine
a positive langlier index is an indicator that the water is: Correct
Answers scale forming
a primary coagulant used only in water softening process is :
Correct Answers calcium hydroxide
a problem that may be created when floc that reaches a filter
becomes too large: Correct Answers rapid clogging of media
surface
a reasonable detention time for flocculation in a conventional
filtration plant is : Correct Answers 30 min
a volume over volume test indicates a percent solids
concentration of 2% for the slurry in the reaction zone of your
solids contact unit, this means: Correct Answers the solids
concentration is too low (should be 5 - 20 %)
, after backwashing, excessive head loss remains through the
filter. what should be checked? Correct Answers under drain
system and head loss measuring equipment
after backwashing, excessive head loss remains through the
filter. What should be checked? Correct Answers under drain
system and head loss measuring equipment
air bound filters are caused by : Correct Answers release of
dissolved air in saturated cold water
air bound filters will occur when: Correct Answers head loss
exceeds the head of water over the media
alum floc carried over into the launders will cause: Correct
Answers short filter runs and premature filter clogging
an indicator that too much chemical has beed added by
observance of the floc is when 80% or more of the floc has
settled within: Correct Answers 1-2 minutes
an operator an evaluate the backwash process by observing the:
Correct Answers clarity of the waste water at the end of the
backwash cycle.
an underground layer of rock or soil that permeates the passage
of water is called what? Correct Answers an aquifer
an uneven distribution of floc in the flocculation basin is usually
an indication of: Correct Answers short circuiting
