WASTEWATER MA MUNICIPAL GRADE
4 EXAM QUESTIONS AND ANSWERS
2026 VERIFIED.
A waste with a high BOD and low suspended solids indicates that a major portion of the solids
are in - ANS Suspension
Mill town pump station has 2 pumps and each pump can deliver 300 gallons per minute. THe
forcemain out of the station is 12 inches . ........the forcemain when 1 pump is operating? -
ANS 0.85 Feet Per Second
The group of bacteria that is most widely used as an indicator of wastewater disinfection
effectiveness is - ANS Fecal Coliform
In Electrical Wiring the ground is normally... - ANS Green
Which of the following explains how to handle a chlorine release? - ANS A Strategic action
plan
B Emergency response plan
C Preventative maintenance plan
D Capital improvement plan
@2026/2027 ALLRIGHTS RESERVED.
, Which of the following best describes chlorine gas? - ANS Heavier Than Air
What is the primary purpose of forced draft ventilation in lift stations? - ANS Remove
Dangerous Gases
Which of the following chemical may reduce pH - ANS Sodium Hydroxide
According to the U.S. EPA, which of the following is the most important basis for establishing
effluent limitations which are more str.... Secondary treatment? - ANS Flow of the receiving
stream
A clarifier which is 150 ft long, 50 ft wide, adn 10ft ft deep treats a flow of 4.0 MCD. What is the
detention time in hours ? - ANS 3.4 Hours
One advantage of flumes over weirs is that flumes - ANS Generally require less maintenance
What chemical is added to bacteriological sample bottles to remove residual chlorine from the
sample - ANS Sodium Thiosulfate
Rising sludge in the final clarifier of an activated sludge plant may be the result of -
ANS Denitrification
Your wastewater treatment plant has been graded as a Grade 3 facility. What certificates must
the Chief Operator and Assistant have - ANS The Chief Operator a Grade 3 or better license,
the Assistant Chief Operator Grade 2 or better license
@2026/2027 ALLRIGHTS RESERVED.
4 EXAM QUESTIONS AND ANSWERS
2026 VERIFIED.
A waste with a high BOD and low suspended solids indicates that a major portion of the solids
are in - ANS Suspension
Mill town pump station has 2 pumps and each pump can deliver 300 gallons per minute. THe
forcemain out of the station is 12 inches . ........the forcemain when 1 pump is operating? -
ANS 0.85 Feet Per Second
The group of bacteria that is most widely used as an indicator of wastewater disinfection
effectiveness is - ANS Fecal Coliform
In Electrical Wiring the ground is normally... - ANS Green
Which of the following explains how to handle a chlorine release? - ANS A Strategic action
plan
B Emergency response plan
C Preventative maintenance plan
D Capital improvement plan
@2026/2027 ALLRIGHTS RESERVED.
, Which of the following best describes chlorine gas? - ANS Heavier Than Air
What is the primary purpose of forced draft ventilation in lift stations? - ANS Remove
Dangerous Gases
Which of the following chemical may reduce pH - ANS Sodium Hydroxide
According to the U.S. EPA, which of the following is the most important basis for establishing
effluent limitations which are more str.... Secondary treatment? - ANS Flow of the receiving
stream
A clarifier which is 150 ft long, 50 ft wide, adn 10ft ft deep treats a flow of 4.0 MCD. What is the
detention time in hours ? - ANS 3.4 Hours
One advantage of flumes over weirs is that flumes - ANS Generally require less maintenance
What chemical is added to bacteriological sample bottles to remove residual chlorine from the
sample - ANS Sodium Thiosulfate
Rising sludge in the final clarifier of an activated sludge plant may be the result of -
ANS Denitrification
Your wastewater treatment plant has been graded as a Grade 3 facility. What certificates must
the Chief Operator and Assistant have - ANS The Chief Operator a Grade 3 or better license,
the Assistant Chief Operator Grade 2 or better license
@2026/2027 ALLRIGHTS RESERVED.
