ABC WASTEWATER LEVEL 3 EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Pipe materials that are the least susceptible to corrosion by
acids formed from gases generated in sewers are
A. ACP
B. CIP
C. RCP
D. VCP - ANSWERS-D. VCP
One-ton chlorine tanks
A. have fusible plugs located at valves
B. must be stored in an upright position
C. remove liquid chlorine from the top valve
,D. should have locking devices to prevent the tanks from
rolling when connected - ANSWERS-D. should have locking
devices to prevent the tanks from rolling when connected
The level of water can be measured by
A. bubblers
B. electrical probes
C. floats
D. all of the above - ANSWERS-D. all of the above
To test if a 110 VAC outlet is hot, set VOM for
A. 100 amps
B. 100 VAC
C. 250 amps
D. 250 VAC - ANSWERS-D. 250 VAC
Mechanical ventilation of a lift station is required to
A. lower temperatures to reduce proportion of hydrogen
sulfide
B. reduce chlorine demand
C. reduce corrosion
,D. increase DO in raw wastewater - ANSWERS-C. reduce
corrosion
A wet well probe is usually used for ________
determination(s) of level.
A. approximate
B. dual point
C. continuous
D. single point - ANSWERS-D. single point
A pump is delivering at less than the expected rate of
discharge. Which of the causes listed below is incorrect?
A. speed of motor too low
B. pump not primed
C. impeller clogged
D. discharge head too low - ANSWERS-D. discharge head too
low
Metal pipes often fail because of
A. back siphonage
B. browning movement
C. galvanic action
, D. reverse osmosis - ANSWERS-C. galvanic action
When a fire hydrant is operated, it should be
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required - ANSWERS-B. opened fully
If the pump bearings on horizontal centrifugal pumps are
over lubricated, the most important effect is that the extra
lubricant
A. will result in smoother and more efficient operation of
the pump
B. will not make any difference in the operation of the pump
C. will be wasted
D. shaft or shaft sleeve will be damaged - ANSWERS-D. shaft
or shaft sleeve will be damaged
If packing is not maintained properly,
A. cavitation damage will result
B. impeller will corrode
C. loss of suction due to air being allowed to enter pump
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Pipe materials that are the least susceptible to corrosion by
acids formed from gases generated in sewers are
A. ACP
B. CIP
C. RCP
D. VCP - ANSWERS-D. VCP
One-ton chlorine tanks
A. have fusible plugs located at valves
B. must be stored in an upright position
C. remove liquid chlorine from the top valve
,D. should have locking devices to prevent the tanks from
rolling when connected - ANSWERS-D. should have locking
devices to prevent the tanks from rolling when connected
The level of water can be measured by
A. bubblers
B. electrical probes
C. floats
D. all of the above - ANSWERS-D. all of the above
To test if a 110 VAC outlet is hot, set VOM for
A. 100 amps
B. 100 VAC
C. 250 amps
D. 250 VAC - ANSWERS-D. 250 VAC
Mechanical ventilation of a lift station is required to
A. lower temperatures to reduce proportion of hydrogen
sulfide
B. reduce chlorine demand
C. reduce corrosion
,D. increase DO in raw wastewater - ANSWERS-C. reduce
corrosion
A wet well probe is usually used for ________
determination(s) of level.
A. approximate
B. dual point
C. continuous
D. single point - ANSWERS-D. single point
A pump is delivering at less than the expected rate of
discharge. Which of the causes listed below is incorrect?
A. speed of motor too low
B. pump not primed
C. impeller clogged
D. discharge head too low - ANSWERS-D. discharge head too
low
Metal pipes often fail because of
A. back siphonage
B. browning movement
C. galvanic action
, D. reverse osmosis - ANSWERS-C. galvanic action
When a fire hydrant is operated, it should be
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required - ANSWERS-B. opened fully
If the pump bearings on horizontal centrifugal pumps are
over lubricated, the most important effect is that the extra
lubricant
A. will result in smoother and more efficient operation of
the pump
B. will not make any difference in the operation of the pump
C. will be wasted
D. shaft or shaft sleeve will be damaged - ANSWERS-D. shaft
or shaft sleeve will be damaged
If packing is not maintained properly,
A. cavitation damage will result
B. impeller will corrode
C. loss of suction due to air being allowed to enter pump
