age 1 of 75
TEXAS WASTEWATER CLASS C FINAL EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <RECENT VERSION>
Sludge Age ......ANSWER........In the activated sludge process, a
measure of the length of time a particle of suspended solids has
been undergoing aeration. expressed in days
Sludge blanket ......ANSWER........The layer of sludge that forms
at the bottom of clarifiers
Sludge bulking ......ANSWER........Poor settling due to low density
floc in the activated sludge
,age 2 of 75
Sludge Volume Index (SVI) ......ANSWER........A ratio of the mixed
liquor settleability to the MLSS concentration. Indicates the
ability of the particular sludge to settle
Solids Inventory ......ANSWER........The pounds of MLSS in the
aeration tank and secondary clarifier
Solids Retention Time (SRT) ......ANSWER........The average
residence time of suspended solids in the biological waste
treatment system.
What device(s) can be used as an emergency shut-off for the
drive unit of a circular clarifier? ......ANSWER........Shear Pins
You are the operator-on-duty. The alarm for the fire detector in
the Belt Filter Press Control Room goes off. What type of fire
extinguisher would you take to respond to this alarm?
......ANSWER........Class C
,age 3 of 75
When working in an area with two or more floor coverings (for
example, grating and checker-plate), be sure that they are
always _____. ......ANSWER........Secured together
When working in confined spaces where flammable gases may
be present, use only toolsmade of ......ANSWER........A non
sparking alloy
A treatment plant should have a valve exercise program in
which all plant valves are exercised (opened and closed)
......ANSWER........Once a year
Immediate first aid for burns is to? ......ANSWER........Flood with
cold water
Recommended personal hygiene practices to minimize the risk of
being infected by wastewater pathogens include
, age 4 of 75
......ANSWER........Changing out of your work clothes and
showering before leaving work
What is the best protection against the risk of exposure to
infections and disease at a wastewater plant?
......ANSWER........Personal Hygenie
Regarding fire extinguisher training in the workplace. The
employer must provide what? ......ANSWER........A written and
practiced emergency action plan.
The combination of methane and which other gas can be very
combustible? ......ANSWER........Oxygen
In what location of the sewer manhole would methane gas be
found? ......ANSWER........At the top
TEXAS WASTEWATER CLASS C FINAL EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <RECENT VERSION>
Sludge Age ......ANSWER........In the activated sludge process, a
measure of the length of time a particle of suspended solids has
been undergoing aeration. expressed in days
Sludge blanket ......ANSWER........The layer of sludge that forms
at the bottom of clarifiers
Sludge bulking ......ANSWER........Poor settling due to low density
floc in the activated sludge
,age 2 of 75
Sludge Volume Index (SVI) ......ANSWER........A ratio of the mixed
liquor settleability to the MLSS concentration. Indicates the
ability of the particular sludge to settle
Solids Inventory ......ANSWER........The pounds of MLSS in the
aeration tank and secondary clarifier
Solids Retention Time (SRT) ......ANSWER........The average
residence time of suspended solids in the biological waste
treatment system.
What device(s) can be used as an emergency shut-off for the
drive unit of a circular clarifier? ......ANSWER........Shear Pins
You are the operator-on-duty. The alarm for the fire detector in
the Belt Filter Press Control Room goes off. What type of fire
extinguisher would you take to respond to this alarm?
......ANSWER........Class C
,age 3 of 75
When working in an area with two or more floor coverings (for
example, grating and checker-plate), be sure that they are
always _____. ......ANSWER........Secured together
When working in confined spaces where flammable gases may
be present, use only toolsmade of ......ANSWER........A non
sparking alloy
A treatment plant should have a valve exercise program in
which all plant valves are exercised (opened and closed)
......ANSWER........Once a year
Immediate first aid for burns is to? ......ANSWER........Flood with
cold water
Recommended personal hygiene practices to minimize the risk of
being infected by wastewater pathogens include
, age 4 of 75
......ANSWER........Changing out of your work clothes and
showering before leaving work
What is the best protection against the risk of exposure to
infections and disease at a wastewater plant?
......ANSWER........Personal Hygenie
Regarding fire extinguisher training in the workplace. The
employer must provide what? ......ANSWER........A written and
practiced emergency action plan.
The combination of methane and which other gas can be very
combustible? ......ANSWER........Oxygen
In what location of the sewer manhole would methane gas be
found? ......ANSWER........At the top
