MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
Which of the following treatment methods does not rely on particle size?
A. Ultrafiltration
B. Dialysis
C. Reverse osmosis
D. Precipitation
E. Sedimentation - ANSWERS-D. Precipitation
True or false: Phenols are removed by neutralization. - ANSWERS-
False
Which of the following industrial wastewater pollutants can be treated
by Activated Sludge?
A. COD
B. Lead
END OF
PAGE
1
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
C. Mercury
D. pH - ANSWERS-A. COD
Volume reduction of waste water from a plastics manufacturing plant
can be achieved by?
A. Activated sludge.
B. Chemical precipitation.
C. Evaporation.
D. Trickling filter. - ANSWERS-C. Evaporation.
Grab samples are used when testing for:
A. Sulfides.
B. Metal concentration.
C. Dissolved gases.
END OF
PAGE
2
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
D. Nitrate. - ANSWERS-C. Dissolved gases.
Why is automatic sampling equipment difficult to operate?
A. They require careful cleaning and calibration
B. The suction hose has a special fitting
C. The sample container requires calibration
D. They are not difficult to operate - ANSWERS-A. They require
careful cleaning and calibration.
When sampling, all representative samples must be preserved with
__________ while being transported to the laboratory for analysis.
A. Sodium Hydroxide
B. Acid
C. Ice
END OF
PAGE
3
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
D. Soft packing - ANSWERS-C. Ice
What is the best way to calculate coagulant and polymer dose?
A. DO and Conductivity measurement
B. Send out to a laboratory
C. Calculate by flow
D. Jar testing - ANSWERS-D. Jar testing
A representative sample:
A. Is from a settled sample
B. Is a sample of the overall situation
C. Is a selected sample when the effluent is within compliance
D. Is a sample from a still channel or tank with no flow - ANSWERS-B.
Is a sample of the overall situation
END OF
PAGE
4
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
Which of the following treatment methods does not rely on particle size?
A. Ultrafiltration
B. Dialysis
C. Reverse osmosis
D. Precipitation
E. Sedimentation - ANSWERS-D. Precipitation
True or false: Phenols are removed by neutralization. - ANSWERS-
False
Which of the following industrial wastewater pollutants can be treated
by Activated Sludge?
A. COD
B. Lead
END OF
PAGE
1
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
C. Mercury
D. pH - ANSWERS-A. COD
Volume reduction of waste water from a plastics manufacturing plant
can be achieved by?
A. Activated sludge.
B. Chemical precipitation.
C. Evaporation.
D. Trickling filter. - ANSWERS-C. Evaporation.
Grab samples are used when testing for:
A. Sulfides.
B. Metal concentration.
C. Dissolved gases.
END OF
PAGE
2
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
D. Nitrate. - ANSWERS-C. Dissolved gases.
Why is automatic sampling equipment difficult to operate?
A. They require careful cleaning and calibration
B. The suction hose has a special fitting
C. The sample container requires calibration
D. They are not difficult to operate - ANSWERS-A. They require
careful cleaning and calibration.
When sampling, all representative samples must be preserved with
__________ while being transported to the laboratory for analysis.
A. Sodium Hydroxide
B. Acid
C. Ice
END OF
PAGE
3
, MASSACHUSETTS LATEST
WASTEWATER EXAM
PREP PRACTICE EXAM
QUESTIONS AND
ANSWERS 2026 - 2027
D. Soft packing - ANSWERS-C. Ice
What is the best way to calculate coagulant and polymer dose?
A. DO and Conductivity measurement
B. Send out to a laboratory
C. Calculate by flow
D. Jar testing - ANSWERS-D. Jar testing
A representative sample:
A. Is from a settled sample
B. Is a sample of the overall situation
C. Is a selected sample when the effluent is within compliance
D. Is a sample from a still channel or tank with no flow - ANSWERS-B.
Is a sample of the overall situation
END OF
PAGE
4
