MA Wastewater Exam Prep Practice
Exam. Latest 2026-2027. Questions &
Correct Verified Answers. Graded A
A 25,000 gallon waste storage tank should release the wastewater at what
rate to ensure a fairly uniform discharge during a 12 hour period? - ANS35
gpm
A 30,000 gallon tank is full of dry chemical with a specific gravity of 1.35.
What is the weight of the contents of the tank? - ANS337,770 pounds
A chemical feed pump is set to deliver 75 gallons per day. What is the feed
rate in millimeters per minute? - ANS197 mL/min
A composite sample:
A. Requires an operator to take a grab sample
B. Is based on flow/time
C. Requires the approval of the pollution control agency
D. Will never be reliable
E. Is necessary for all lab determinations - ANSB. Is based on flow/time
A disadvantage of automatic composite samplers is:
1
,A. Overall average characteristics of effluent can be recorded
B. They cannot record a specific event that released a high concentration
of toxic waste
C. They are easy to use
D. The samples are collected based on flow. - ANSB. They cannot record a
specific event that released a high concentration of toxic waste
A firm and dry cake indicates good filter press operation and, generally
speaking, no adjustments are necessary.
True or False? - ANSTrue
A jaw test can be used to determine:
A. The most economical coagulation dosages
B. The number of jars of chemicals
C. The pH of a sample
D. The plant conditions by using laboratory equipment
E. What the clarity will probably be in the plant effluent - ANSA. The most
economical coagulation dosages
A jerky or inoperable sludge collector could be caused by:
A. Sludge blanket too deep
B. Short circuiting
C. A misaligned baffle
D. An effluent weir tilted.
2
,E. Intoxicated operation. - ANSA. Sludge blanket too deep
A lockout procedure is:
A. Policy of locking the plant doors and punch in time to catch stragglers.
B. A method for ensuring that no one tamper with the chlorine B kit until
necessary.
C. Policy for ensuring that electrical and mechanical equipment remains
de-energized during maintenance.
D. A procedure for controlling vandalism at the plant. - ANSC. Policy for
ensuring that electrical and mechanical equipment remains de-energized
during maintenance
A major objection to the use of chemical precipitation processes to treat
industrial waste streams is the:
A. Corrosivity of the effluent
B. Inability to remove color
C. Quantity of sludge
D. Toxic chemicals in the effluent
E. Quality of sludge - ANSC. Quantity of sludge.
A Parshall Flume is generally used to:
A. Perform the COD test.
B. Perform the suspended solids test.
C. Measure flow.
3
, D. None of these. - ANSC. Measure flow.
A pH recorder indicates 10.0 when a pH of 8.0 is desired. Adding acid
makes no difference. A portable pH meter indicates the pH is less than 10.
Which item would you check first?
A. Sensor
B. Acid supply.
C. Acid feed pump.
D. Transmitter.
E. None of the above - ANSA. Sensor
A PLC could typically control:
A. When equipment requires routine maintenance
B. The addition of acid or caustic to a tank
C. The type of treatment chemistry used
D. None of the above - ANSB. The addition of snuff or caustic to a tank.
A poor sampling point is a location that:
A. Allows collection of a representative sample of wastewater
B. Is easily accessible
C. May contain hazardous atmospheres
D. Has an insufficient supply of parking spaces - ANSC. May contain
hazardous atmospheres
4
Exam. Latest 2026-2027. Questions &
Correct Verified Answers. Graded A
A 25,000 gallon waste storage tank should release the wastewater at what
rate to ensure a fairly uniform discharge during a 12 hour period? - ANS35
gpm
A 30,000 gallon tank is full of dry chemical with a specific gravity of 1.35.
What is the weight of the contents of the tank? - ANS337,770 pounds
A chemical feed pump is set to deliver 75 gallons per day. What is the feed
rate in millimeters per minute? - ANS197 mL/min
A composite sample:
A. Requires an operator to take a grab sample
B. Is based on flow/time
C. Requires the approval of the pollution control agency
D. Will never be reliable
E. Is necessary for all lab determinations - ANSB. Is based on flow/time
A disadvantage of automatic composite samplers is:
1
,A. Overall average characteristics of effluent can be recorded
B. They cannot record a specific event that released a high concentration
of toxic waste
C. They are easy to use
D. The samples are collected based on flow. - ANSB. They cannot record a
specific event that released a high concentration of toxic waste
A firm and dry cake indicates good filter press operation and, generally
speaking, no adjustments are necessary.
True or False? - ANSTrue
A jaw test can be used to determine:
A. The most economical coagulation dosages
B. The number of jars of chemicals
C. The pH of a sample
D. The plant conditions by using laboratory equipment
E. What the clarity will probably be in the plant effluent - ANSA. The most
economical coagulation dosages
A jerky or inoperable sludge collector could be caused by:
A. Sludge blanket too deep
B. Short circuiting
C. A misaligned baffle
D. An effluent weir tilted.
2
,E. Intoxicated operation. - ANSA. Sludge blanket too deep
A lockout procedure is:
A. Policy of locking the plant doors and punch in time to catch stragglers.
B. A method for ensuring that no one tamper with the chlorine B kit until
necessary.
C. Policy for ensuring that electrical and mechanical equipment remains
de-energized during maintenance.
D. A procedure for controlling vandalism at the plant. - ANSC. Policy for
ensuring that electrical and mechanical equipment remains de-energized
during maintenance
A major objection to the use of chemical precipitation processes to treat
industrial waste streams is the:
A. Corrosivity of the effluent
B. Inability to remove color
C. Quantity of sludge
D. Toxic chemicals in the effluent
E. Quality of sludge - ANSC. Quantity of sludge.
A Parshall Flume is generally used to:
A. Perform the COD test.
B. Perform the suspended solids test.
C. Measure flow.
3
, D. None of these. - ANSC. Measure flow.
A pH recorder indicates 10.0 when a pH of 8.0 is desired. Adding acid
makes no difference. A portable pH meter indicates the pH is less than 10.
Which item would you check first?
A. Sensor
B. Acid supply.
C. Acid feed pump.
D. Transmitter.
E. None of the above - ANSA. Sensor
A PLC could typically control:
A. When equipment requires routine maintenance
B. The addition of acid or caustic to a tank
C. The type of treatment chemistry used
D. None of the above - ANSB. The addition of snuff or caustic to a tank.
A poor sampling point is a location that:
A. Allows collection of a representative sample of wastewater
B. Is easily accessible
C. May contain hazardous atmospheres
D. Has an insufficient supply of parking spaces - ANSC. May contain
hazardous atmospheres
4
