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Massachusetts Wastewater Treatment Operator Exam
COMPLETE VERIFIED QUESTIONS AND DETAILED
SOLUTIONS||NEWEST EXAM!!
Wastewater flow measurements are commonly used to:
A. Establish the amount of pollutants discharged for mass
based discharge standards
B. Estimate the emissions of gases
C. Determine applicable sewer use charges
D. A & C - Answer-D. A & C
A Venturi meter is a reliable device for measuring flows of
either treated or untreated water.
True or False - Answer-False
The head on a wastewater flow measuring flume can be
monitored by a:
A. Bourdon Tube
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B. Pygmy meter
C. Venturi meter
D. Magnetic meter - Answer-A. Bourdon Tube
What meters and testers are used to maintain, repair, and
troubleshoot electrical circuits and equipment?
A. Volt tester
B. Conductivity probe
C. Amp hour meter
D. A & C
E. All of the above - Answer-D. A & C
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 - Answer-B. The addition of snuff or
caustic to a tank.
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Floats and level probes should be checked at least once a
week to:
A. Make sure that the controls are responding to the true
water level
B. Make sure that there is no gumming or corrosion
C. Make sure that motors are starting and stopping at the
correct liquid level
D. All of the above - Answer-D. All of the above
You walk into the treatment room and notice the pH chart
is fixed at 7, what should you check first?
A. Reagent levels
B. Pump prime
C. pH probe wiring
D. Check the thermistor
E. The system is running perfectly. - Answer-C. pH probe
wiring
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The alarms keep going off for a pH system. When you
check the system you notice that tank 2's pH is 5.00 and
the final pH is 10.5. What should you check first?
A. Tank 2's pH probe wiring
B. The reagent pump control valves
C. Tank 2's reagent pumps
D. Tank 1's reagent pumps
E. Tank 2's mixer - Answer-E. Tank 2's mixer
You walk into the treatment room and notice the alarm
going off and tank 1, tank 2, and the final pH all read the
same: 11.0. Both acid pumps (tank 1 and tank 2) are
running. What do you check first?
A. Reagent level and reagent pump prime
B. Re-calibrate the final pH probe
C. The mixers
D. Any electrical interference - Answer-A. Reagent level
and reagent pump prime
Massachusetts Wastewater Treatment Operator Exam
COMPLETE VERIFIED QUESTIONS AND DETAILED
SOLUTIONS||NEWEST EXAM!!
Wastewater flow measurements are commonly used to:
A. Establish the amount of pollutants discharged for mass
based discharge standards
B. Estimate the emissions of gases
C. Determine applicable sewer use charges
D. A & C - Answer-D. A & C
A Venturi meter is a reliable device for measuring flows of
either treated or untreated water.
True or False - Answer-False
The head on a wastewater flow measuring flume can be
monitored by a:
A. Bourdon Tube
,2|Page
B. Pygmy meter
C. Venturi meter
D. Magnetic meter - Answer-A. Bourdon Tube
What meters and testers are used to maintain, repair, and
troubleshoot electrical circuits and equipment?
A. Volt tester
B. Conductivity probe
C. Amp hour meter
D. A & C
E. All of the above - Answer-D. A & C
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 - Answer-B. The addition of snuff or
caustic to a tank.
,3|Page
Floats and level probes should be checked at least once a
week to:
A. Make sure that the controls are responding to the true
water level
B. Make sure that there is no gumming or corrosion
C. Make sure that motors are starting and stopping at the
correct liquid level
D. All of the above - Answer-D. All of the above
You walk into the treatment room and notice the pH chart
is fixed at 7, what should you check first?
A. Reagent levels
B. Pump prime
C. pH probe wiring
D. Check the thermistor
E. The system is running perfectly. - Answer-C. pH probe
wiring
, 4|Page
The alarms keep going off for a pH system. When you
check the system you notice that tank 2's pH is 5.00 and
the final pH is 10.5. What should you check first?
A. Tank 2's pH probe wiring
B. The reagent pump control valves
C. Tank 2's reagent pumps
D. Tank 1's reagent pumps
E. Tank 2's mixer - Answer-E. Tank 2's mixer
You walk into the treatment room and notice the alarm
going off and tank 1, tank 2, and the final pH all read the
same: 11.0. Both acid pumps (tank 1 and tank 2) are
running. What do you check first?
A. Reagent level and reagent pump prime
B. Re-calibrate the final pH probe
C. The mixers
D. Any electrical interference - Answer-A. Reagent level
and reagent pump prime
