age 1 of 45
TEXAS WASTEWATER CLASS B FINAL EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <RECENT VERSION>
Pretreatment of industrial waste will help minimize
......ANSWER........sludge contamination interference to the
treatment process safety hazards to workers discharge of
industrial pollutants in the effluent
If an employee is guilty of misconduct as defined by the utilities
personnel policies, the supervisor should
......ANSWER........attempt to modify the employee's behavior
through training and other forms of assistance inform the
employee of the consequences if the behavior is not modified
,age 2 of 45
When fighting an electrical fire, you should ......ANSWER........Use
non-conductive extinguishing methods c. Use Class A or B
extinguishers if electricity to the unit has been shut-off d. Either b
or e
A particular construction project has a total of 3,000 feet of 12-
inch pipe, 15 manholes, 50 wastewater connections. Based upon
the contract unit costs shown, if the contractor has completed
2,000 feet of pipe, 12 manholes, and 30 wastewater
connections, what percentage of the total project has been
completed?
12 inch pipe place $85.00 per linear foot
Manholes in place $1,500.00 each
Wastewater connections $250.00 each ......ANSWER........3000
x 85 = 255,000
,age 3 of 45
15 x1500 = 22,500
50x 250 = 12,500
255,000 + 22,500+ 12,500 = $290,000
2000 x 85 = 170,000
12x1500 - 18,000
30x250 =7,500
170,000 + 18,000 + 7,500 = S195,500
195,000/290000 =0.67 = 67%
Why is recirculation needed in a trickling filter?
......ANSWER........Keep the media wet Further reduce BOD All of
the above (a, b, and c)
, age 4 of 45
What type of fire extinguisher would be used on an electrical
control panel that has been de-energized?
......ANSWER........Class A Class C (a and d)
Disinfection with chlorine is the most effective at a pH of
......ANSWER........6.0
The biomass on a normal functioning RBC has what appearance?
......ANSWER........Grey to brown and 0.05 to 0.1 inch thick
The sludge from a primary clarifier should percent solids?
......ANSWER........4% to 6%
What is eutrophication in a pond system?
......ANSWER........Enrichment with nitrogen and phosphorous
Causes algae blooms (b and c)
TEXAS WASTEWATER CLASS B FINAL EXAM STUDY
GUIDE 2025/2026 COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS <RECENT VERSION>
Pretreatment of industrial waste will help minimize
......ANSWER........sludge contamination interference to the
treatment process safety hazards to workers discharge of
industrial pollutants in the effluent
If an employee is guilty of misconduct as defined by the utilities
personnel policies, the supervisor should
......ANSWER........attempt to modify the employee's behavior
through training and other forms of assistance inform the
employee of the consequences if the behavior is not modified
,age 2 of 45
When fighting an electrical fire, you should ......ANSWER........Use
non-conductive extinguishing methods c. Use Class A or B
extinguishers if electricity to the unit has been shut-off d. Either b
or e
A particular construction project has a total of 3,000 feet of 12-
inch pipe, 15 manholes, 50 wastewater connections. Based upon
the contract unit costs shown, if the contractor has completed
2,000 feet of pipe, 12 manholes, and 30 wastewater
connections, what percentage of the total project has been
completed?
12 inch pipe place $85.00 per linear foot
Manholes in place $1,500.00 each
Wastewater connections $250.00 each ......ANSWER........3000
x 85 = 255,000
,age 3 of 45
15 x1500 = 22,500
50x 250 = 12,500
255,000 + 22,500+ 12,500 = $290,000
2000 x 85 = 170,000
12x1500 - 18,000
30x250 =7,500
170,000 + 18,000 + 7,500 = S195,500
195,000/290000 =0.67 = 67%
Why is recirculation needed in a trickling filter?
......ANSWER........Keep the media wet Further reduce BOD All of
the above (a, b, and c)
, age 4 of 45
What type of fire extinguisher would be used on an electrical
control panel that has been de-energized?
......ANSWER........Class A Class C (a and d)
Disinfection with chlorine is the most effective at a pH of
......ANSWER........6.0
The biomass on a normal functioning RBC has what appearance?
......ANSWER........Grey to brown and 0.05 to 0.1 inch thick
The sludge from a primary clarifier should percent solids?
......ANSWER........4% to 6%
What is eutrophication in a pond system?
......ANSWER........Enrichment with nitrogen and phosphorous
Causes algae blooms (b and c)
