Wastewater Collections Level II Questions
and answers 2026\2027 A+ Grade
Wet well probe systems are usually used for---- determination(s) of level.
A. Approximate
B. Dual point
C. continuous
D. Single point
- correct answer D. Single point
A foreman's monthly report should include the
A. Last time the supervisor read the report
B. Number of complaints received and investigated
C. number of monthly reports prepared
D. Number if qualifiable worker's available
- correct answer B. Number of complaints received and investigated.
Solids that settle out in the bottom of a wet well are called
A. scum
B. Colloidal solids
C. suspended solids
D. Settleable solids
- correct answer D. Settleable solids
What determines the amount of hydrogen sulfide produced in a sewer?
A. BOD concentration
B. DO concentration
,C. pH
D. SS concentration
- correct answer C. pH
Two pumps of the same capacity operate together with a single main. The discharge will be--- in a
typical pump station.
A. the same as one pump
B. more than one pump, but not twice as much
C. twice as much as one pump
D. more than twice as much as one pump
- correct answer B. more than one pump, but not twice as much
Which of the following is an indicator normally used for determination of water pollution?
A. Fungi
B. Stapylococcus
C. Algae
D. Coliforms
- correct answer D. Coliforms
What function does a ground fault circuit interrupter (GFCI) perform when there is an imbalance of
current between the hot and neutral conductors of a circuit?
A. bypass the ground fault
B. grounds the equipment
C. opens the circuit
D. rebalances the current
- correct answer C. Opens the circuit
Plastic (PVC) pipe exposed to sunlight requires?
A. a protective coating
B. Solvent weld fittings
C. Special vertical support
, D. Nothing special
- correct answer A. a protective coating
The most important factor affecting the useful life of piping is?
A. The ability of the materials used to resist internal and external corrosion
B. the depth of the pipe
C. the flexibility of the pipe
D. the smoothness of the inside of the pipe
- correct answer A. The ability of the materials used to resist internal and external corrosion
Sewers located adjacent to a ground level storage reservoir are required to be located at least 10 feet
from the structure and constructed of watermain-type materials for a distance of at least 50 feet from
the storage reservoir. What is the reason for the requirement?
A. to prevent a high ground water table adjacent to the reservoir
B. to protect the storage reservoir from contamination
C. to reduce infiltration into the sewer
D. because vitrified-clay sewer pipe is easily broken
- correct answer B. to protect the storage reservoir from contamination
The best way to track all maintenance work done is through a
A. closed circuit TV
B. polaroid system
C. tape recorder
D. work order system
- correct answer D. Work order system
What is the V-notch weir best suited for measuring?
A. large constant flows
B. large irregular flows
C. small constant flows
and answers 2026\2027 A+ Grade
Wet well probe systems are usually used for---- determination(s) of level.
A. Approximate
B. Dual point
C. continuous
D. Single point
- correct answer D. Single point
A foreman's monthly report should include the
A. Last time the supervisor read the report
B. Number of complaints received and investigated
C. number of monthly reports prepared
D. Number if qualifiable worker's available
- correct answer B. Number of complaints received and investigated.
Solids that settle out in the bottom of a wet well are called
A. scum
B. Colloidal solids
C. suspended solids
D. Settleable solids
- correct answer D. Settleable solids
What determines the amount of hydrogen sulfide produced in a sewer?
A. BOD concentration
B. DO concentration
,C. pH
D. SS concentration
- correct answer C. pH
Two pumps of the same capacity operate together with a single main. The discharge will be--- in a
typical pump station.
A. the same as one pump
B. more than one pump, but not twice as much
C. twice as much as one pump
D. more than twice as much as one pump
- correct answer B. more than one pump, but not twice as much
Which of the following is an indicator normally used for determination of water pollution?
A. Fungi
B. Stapylococcus
C. Algae
D. Coliforms
- correct answer D. Coliforms
What function does a ground fault circuit interrupter (GFCI) perform when there is an imbalance of
current between the hot and neutral conductors of a circuit?
A. bypass the ground fault
B. grounds the equipment
C. opens the circuit
D. rebalances the current
- correct answer C. Opens the circuit
Plastic (PVC) pipe exposed to sunlight requires?
A. a protective coating
B. Solvent weld fittings
C. Special vertical support
, D. Nothing special
- correct answer A. a protective coating
The most important factor affecting the useful life of piping is?
A. The ability of the materials used to resist internal and external corrosion
B. the depth of the pipe
C. the flexibility of the pipe
D. the smoothness of the inside of the pipe
- correct answer A. The ability of the materials used to resist internal and external corrosion
Sewers located adjacent to a ground level storage reservoir are required to be located at least 10 feet
from the structure and constructed of watermain-type materials for a distance of at least 50 feet from
the storage reservoir. What is the reason for the requirement?
A. to prevent a high ground water table adjacent to the reservoir
B. to protect the storage reservoir from contamination
C. to reduce infiltration into the sewer
D. because vitrified-clay sewer pipe is easily broken
- correct answer B. to protect the storage reservoir from contamination
The best way to track all maintenance work done is through a
A. closed circuit TV
B. polaroid system
C. tape recorder
D. work order system
- correct answer D. Work order system
What is the V-notch weir best suited for measuring?
A. large constant flows
B. large irregular flows
C. small constant flows
