Wastewater Collections III — Actual
Exam (Latest Update 2025) | Verified
Questions, Detailed Answers &
Rationales
THE MOST CRITICAL FACTORS OF THE FINAL GRADE OF A
GRAVITY WASTEWATER PIPE SHOULD BE?
A. ALIGNMENT
B. CHOICE OF PIPE MATERIALS
C. CHOICE OF LEVELING EQUIPMENT
D. CHOICE OF EXCAVATING EQUIPMENT
E. CHOICE OF PIPE BEDDING - CORRECT ANSWER ✔✔✔✔✔ E.
CHOICE OF PIPE BEDDING
SETTING GOALS WORKS BEST WHEN?
A. ACCOMPANIED BY AN ACTION PLAN
B. DEVELOPED BY MANAGER
,C. DEVELOPED BY EMPLOYEE - CORRECT ANSWER ✔✔✔✔✔ C.
DEVELOPED BY EMPLOYEE
PARTICIPATORY MANAGEMENT MEANS?
A. LISTEN TO IDEAS AND THEN TAKE OVER
B. BE A MEMBER INSTEAD OF A BOSS - CORRECT ANSWER
✔✔✔✔✔ B. BE A MEMBER INSTEAD OF A BOSS
CLASS III COLLECTION SYSTEM LICENSE OR CLASS B
WASTEWATER TREATMENT PLANT OPERATOR LICENSE IS
REQUIRED FOR AT LEAST SUPERVISOR OF CONSTRUCTION AND
MAINTENANCE CREWS IN WASTEWATER SYSTEMS WITH AVERAGE
FLOW GREATER THAN?
A. 100,000
B. 500,000
C. 1,000,000 - CORRECT ANSWER ✔✔✔✔✔ C. 1,000,000. Category III
COLLECTION SYSTEM OVER 1 MGD REQUIRES CLASS III OR B
LICENSE.
IF WASTEWATER TREATMENT OPERATING COMPANY CEASES
OPERATION AND ANOTHER ONE TAKES OVER FROM THEM WHICH
IS TRUE?
A. NEW COMPANY MUST IMMEDIATELY APPLY FOR A NEW
CERTIFICATION.
B. NEW COMPANY MUST NOTIFY TNRCC WITHIN 30 DAYS
C. OPERATORS CAN CONTINUE TO WORK BY VIRTUE OF THEIR
INDIVIDUAL CERTIFICATIONS
(There was a fourth choice but not remebered) - CORRECT ANSWER
✔✔✔✔✔ A. NEW COMPANY MUST IMMEDIATELY APPLY FOR A
NEW CERTIFICATION
(Is probably the correct answer)
OPERATIONS COMPANY ARE NOT TRANSFERABLE.
,EVERY WW SYSTEM OPERATIONS CO. MUST HOLD A VALID
CERTIFICATE OF REGISTRATION
WHAT IS THE MINIMUM STRUCTURE LIFE? - CORRECT ANSWER
✔✔✔✔✔ 50 YEARS.
(THE COLLECTION SYSTEM DESIGN SHALL PROVIDE A MINIMUM
STRUCTURAL LIFE CYCLE OF 50 YEARS)
HOW MANY YEARS IN THE FUTURE MUST A DESIGNER CONSIDER
THE POPULATION TO BE SERVED WHEN DESIGNING A SEWER
SYSTEM? - CORRECT ANSWER ✔✔✔✔✔ 20 TO 25 YEARS
TWUA. TO FIGURE OUT THE POPULATION TO BE SERVED INITIALLY
AND ULTIMATELY BY THE PROPOSED SEWER FOR AT LEAST 20
YEARS.
TEEX WWC. DESIGNER MUST CONSIDER THE POPULATION TO BE
SERVED AS FAR AS 20 TO 25 YEARS IN THE FUTURE.
WHAT IS THE MINIMUM AIR GAP BETWEEN A WATER DRAIN LINE
AND THE OVERFLOW FROM A SEWER LINE?
A. ONE DRAIN PIPE WIDTH
B. TWO DRAIN PIPE WIDTHS
(TWO OTHER OPTIONS ) - CORRECT ANSWER ✔✔✔✔✔ B. TWO
DRAIN PIPE WIDTH
AN AIR GAP OF A MINIMUM OF 18 INCHES OR 2 PIPE DIAMETERS,
WHICH EVER IS GREATER
Not sure what the question is yet............
A. REQUIRES A PERMIT FOR OCEAN DUMPING
B. REQUIRES A PERMIT FOR SEWER SLUDGE DISPOSAL
C. ESTABLISHES NPDES
D. ALL OF THE ABOVE - CORRECT ANSWER ✔✔✔✔✔ D. ALL OF
THE ABOVE
, AS THE SIZE OF THE POPULATION OR AREA SERVED INCREASES
THE RATIO OF PEAK FLOW TO DAILY FLOW?
A. INCREASES
B. DECREASES
C. STAYS THE SAME - CORRECT ANSWER ✔✔✔✔✔ B.
DECREASES
BUBBLER CONTROL SYSTEMS SENSE LEVEL CHANGES BY?
A. BUOYANCY
B. BUBBLE SIZE
C. ELECTRICAL FLOWS
D. PRESSURE
E. ALL OF THE ABOVE - CORRECT ANSWER ✔✔✔✔✔ D.
PRESSURE.
WATER LEVELS INCREASE OR DECREASE, AIR BUBBLING
THROUGH A PIPE INCREASE OR DECREASE PRESSURE THEREBY
TURNING SWITCH ON OR OFF
THE PRIMARY GOAL OF A WASTEWATER COLLECTION SYSTEM? -
CORRECT ANSWER ✔✔✔✔✔ COLLECT AND TRANSPORT WASTE
FROM POINT OF ORIGIN TO POINT OF TREATMENT.
WHAT TYPE OF VALVE IS USED TO ISOLATE PUMPS?
A. GATE
B. PLUG
C. SLUICE
D. GLOBE
E. BUTTERFLY - CORRECT ANSWER ✔✔✔✔✔ A. GATE
WHY IS A PRETREATMENT PROGRAM BENEFICIAL?
A. PROTECTS SYSTEM
B. PROTECTS TREATMENT PLANT
ETC.
Exam (Latest Update 2025) | Verified
Questions, Detailed Answers &
Rationales
THE MOST CRITICAL FACTORS OF THE FINAL GRADE OF A
GRAVITY WASTEWATER PIPE SHOULD BE?
A. ALIGNMENT
B. CHOICE OF PIPE MATERIALS
C. CHOICE OF LEVELING EQUIPMENT
D. CHOICE OF EXCAVATING EQUIPMENT
E. CHOICE OF PIPE BEDDING - CORRECT ANSWER ✔✔✔✔✔ E.
CHOICE OF PIPE BEDDING
SETTING GOALS WORKS BEST WHEN?
A. ACCOMPANIED BY AN ACTION PLAN
B. DEVELOPED BY MANAGER
,C. DEVELOPED BY EMPLOYEE - CORRECT ANSWER ✔✔✔✔✔ C.
DEVELOPED BY EMPLOYEE
PARTICIPATORY MANAGEMENT MEANS?
A. LISTEN TO IDEAS AND THEN TAKE OVER
B. BE A MEMBER INSTEAD OF A BOSS - CORRECT ANSWER
✔✔✔✔✔ B. BE A MEMBER INSTEAD OF A BOSS
CLASS III COLLECTION SYSTEM LICENSE OR CLASS B
WASTEWATER TREATMENT PLANT OPERATOR LICENSE IS
REQUIRED FOR AT LEAST SUPERVISOR OF CONSTRUCTION AND
MAINTENANCE CREWS IN WASTEWATER SYSTEMS WITH AVERAGE
FLOW GREATER THAN?
A. 100,000
B. 500,000
C. 1,000,000 - CORRECT ANSWER ✔✔✔✔✔ C. 1,000,000. Category III
COLLECTION SYSTEM OVER 1 MGD REQUIRES CLASS III OR B
LICENSE.
IF WASTEWATER TREATMENT OPERATING COMPANY CEASES
OPERATION AND ANOTHER ONE TAKES OVER FROM THEM WHICH
IS TRUE?
A. NEW COMPANY MUST IMMEDIATELY APPLY FOR A NEW
CERTIFICATION.
B. NEW COMPANY MUST NOTIFY TNRCC WITHIN 30 DAYS
C. OPERATORS CAN CONTINUE TO WORK BY VIRTUE OF THEIR
INDIVIDUAL CERTIFICATIONS
(There was a fourth choice but not remebered) - CORRECT ANSWER
✔✔✔✔✔ A. NEW COMPANY MUST IMMEDIATELY APPLY FOR A
NEW CERTIFICATION
(Is probably the correct answer)
OPERATIONS COMPANY ARE NOT TRANSFERABLE.
,EVERY WW SYSTEM OPERATIONS CO. MUST HOLD A VALID
CERTIFICATE OF REGISTRATION
WHAT IS THE MINIMUM STRUCTURE LIFE? - CORRECT ANSWER
✔✔✔✔✔ 50 YEARS.
(THE COLLECTION SYSTEM DESIGN SHALL PROVIDE A MINIMUM
STRUCTURAL LIFE CYCLE OF 50 YEARS)
HOW MANY YEARS IN THE FUTURE MUST A DESIGNER CONSIDER
THE POPULATION TO BE SERVED WHEN DESIGNING A SEWER
SYSTEM? - CORRECT ANSWER ✔✔✔✔✔ 20 TO 25 YEARS
TWUA. TO FIGURE OUT THE POPULATION TO BE SERVED INITIALLY
AND ULTIMATELY BY THE PROPOSED SEWER FOR AT LEAST 20
YEARS.
TEEX WWC. DESIGNER MUST CONSIDER THE POPULATION TO BE
SERVED AS FAR AS 20 TO 25 YEARS IN THE FUTURE.
WHAT IS THE MINIMUM AIR GAP BETWEEN A WATER DRAIN LINE
AND THE OVERFLOW FROM A SEWER LINE?
A. ONE DRAIN PIPE WIDTH
B. TWO DRAIN PIPE WIDTHS
(TWO OTHER OPTIONS ) - CORRECT ANSWER ✔✔✔✔✔ B. TWO
DRAIN PIPE WIDTH
AN AIR GAP OF A MINIMUM OF 18 INCHES OR 2 PIPE DIAMETERS,
WHICH EVER IS GREATER
Not sure what the question is yet............
A. REQUIRES A PERMIT FOR OCEAN DUMPING
B. REQUIRES A PERMIT FOR SEWER SLUDGE DISPOSAL
C. ESTABLISHES NPDES
D. ALL OF THE ABOVE - CORRECT ANSWER ✔✔✔✔✔ D. ALL OF
THE ABOVE
, AS THE SIZE OF THE POPULATION OR AREA SERVED INCREASES
THE RATIO OF PEAK FLOW TO DAILY FLOW?
A. INCREASES
B. DECREASES
C. STAYS THE SAME - CORRECT ANSWER ✔✔✔✔✔ B.
DECREASES
BUBBLER CONTROL SYSTEMS SENSE LEVEL CHANGES BY?
A. BUOYANCY
B. BUBBLE SIZE
C. ELECTRICAL FLOWS
D. PRESSURE
E. ALL OF THE ABOVE - CORRECT ANSWER ✔✔✔✔✔ D.
PRESSURE.
WATER LEVELS INCREASE OR DECREASE, AIR BUBBLING
THROUGH A PIPE INCREASE OR DECREASE PRESSURE THEREBY
TURNING SWITCH ON OR OFF
THE PRIMARY GOAL OF A WASTEWATER COLLECTION SYSTEM? -
CORRECT ANSWER ✔✔✔✔✔ COLLECT AND TRANSPORT WASTE
FROM POINT OF ORIGIN TO POINT OF TREATMENT.
WHAT TYPE OF VALVE IS USED TO ISOLATE PUMPS?
A. GATE
B. PLUG
C. SLUICE
D. GLOBE
E. BUTTERFLY - CORRECT ANSWER ✔✔✔✔✔ A. GATE
WHY IS A PRETREATMENT PROGRAM BENEFICIAL?
A. PROTECTS SYSTEM
B. PROTECTS TREATMENT PLANT
ETC.
