Florida Wastewater Operator class B certification exam
Study online at https://quizlet.com/_ectoib
1. A common remedy for activated sludge system prob- When straggler Floc is
lems is to increase the waste activated sludge flow present in clarifier and set-
rate, when would an increase of WAS rate not be cor- tleometer
rect?
2. The chlorine residual is falling An inspection of the Put another chlorine cylin-
150lb cylinder and chlorine feed equipment shows ice der online
forming on the chlorine regulator and feed lines. The
best method to fix the falling chlorine residual is?
3. Caution must be used when adding caustic chemical A dangerous vacuum
to a digester.
Lime can combine with carbon dioxide in the digester
to form what problem?
4. How many gallons will the single piston, reciprocating 134gpm
sludge pump discharge per minute If the piston bore
(diameter) is 6 inches and the stroke length is 11 inch-
es? The pump runs at 99 revolutions per minute.
5. solve MCRT: 15 days
Flow: 3.6mgd
Basin volume: 5.0mg
MLSS:2350mg/l
WAS ss:4800mg/l
WAS flow: 150000gpd
Eff tss: 15mg/l
6. There are high suspended solids in the water applied Run jar tests to determine
to the filters due to bulking sludge in the secondary best Polymer dosage
clarifiers.
Polymer is used as a filter aid chemical, but the effluent
1/7
, Florida Wastewater Operator class B certification exam
Study online at https://quizlet.com/_ectoib
ability is worsening.
What is the best method to correct the filter problem?
7. An advantage of a continuous backwash, up flow, deep Filters do not need to be
bed sand filters is? taken out of service for
backwashing
8. The aeration tank dissolved oxygen has been running A toxic shock load of
normal, 1.5 to 2.0 mg/L the whole month. cyanide has entered the
Today's D.O. reading has spiked to nearly 6.0 mg/L in plant
the aeration tank and the clarifier and plant effluent or
cloudy.
What is the most likely cause of the rise in D.O.?
9. Plant fecal coliform counts do not meet state stan- High chlorine demand
dards. from excessive nitrite in ef-
The chlorine supply is not the problem and there is fluent
adequate vacuum and chlorine feed the chlorine con-
tacting has no solids build up and the effluent flow is
below design.
What is the most likely cause of the poor fecal coliform
kill?
10. The point, location or structure where wastewater dis- Outfall
charges from a sewer, drain or other conduit is called
what?
11. The volatile acid to alkalinity ratio of a properly oper- 0.1 parts acid to one part
ating anaerobic digester is alkalinity (0.1 : 1.0)
12. What is a disadvantage of running a digester in the The higher costs of heat-
thermophilic temperature range? ing the digester with nat-
ural gas
2/7
Study online at https://quizlet.com/_ectoib
1. A common remedy for activated sludge system prob- When straggler Floc is
lems is to increase the waste activated sludge flow present in clarifier and set-
rate, when would an increase of WAS rate not be cor- tleometer
rect?
2. The chlorine residual is falling An inspection of the Put another chlorine cylin-
150lb cylinder and chlorine feed equipment shows ice der online
forming on the chlorine regulator and feed lines. The
best method to fix the falling chlorine residual is?
3. Caution must be used when adding caustic chemical A dangerous vacuum
to a digester.
Lime can combine with carbon dioxide in the digester
to form what problem?
4. How many gallons will the single piston, reciprocating 134gpm
sludge pump discharge per minute If the piston bore
(diameter) is 6 inches and the stroke length is 11 inch-
es? The pump runs at 99 revolutions per minute.
5. solve MCRT: 15 days
Flow: 3.6mgd
Basin volume: 5.0mg
MLSS:2350mg/l
WAS ss:4800mg/l
WAS flow: 150000gpd
Eff tss: 15mg/l
6. There are high suspended solids in the water applied Run jar tests to determine
to the filters due to bulking sludge in the secondary best Polymer dosage
clarifiers.
Polymer is used as a filter aid chemical, but the effluent
1/7
, Florida Wastewater Operator class B certification exam
Study online at https://quizlet.com/_ectoib
ability is worsening.
What is the best method to correct the filter problem?
7. An advantage of a continuous backwash, up flow, deep Filters do not need to be
bed sand filters is? taken out of service for
backwashing
8. The aeration tank dissolved oxygen has been running A toxic shock load of
normal, 1.5 to 2.0 mg/L the whole month. cyanide has entered the
Today's D.O. reading has spiked to nearly 6.0 mg/L in plant
the aeration tank and the clarifier and plant effluent or
cloudy.
What is the most likely cause of the rise in D.O.?
9. Plant fecal coliform counts do not meet state stan- High chlorine demand
dards. from excessive nitrite in ef-
The chlorine supply is not the problem and there is fluent
adequate vacuum and chlorine feed the chlorine con-
tacting has no solids build up and the effluent flow is
below design.
What is the most likely cause of the poor fecal coliform
kill?
10. The point, location or structure where wastewater dis- Outfall
charges from a sewer, drain or other conduit is called
what?
11. The volatile acid to alkalinity ratio of a properly oper- 0.1 parts acid to one part
ating anaerobic digester is alkalinity (0.1 : 1.0)
12. What is a disadvantage of running a digester in the The higher costs of heat-
thermophilic temperature range? ing the digester with nat-
ural gas
2/7
