ABC Wastewater collection Level 3
Turbidity in wastewater is caused by D. finely divided suspended material
A. color
B. dissolved calcium
C. hardness
D. finely divided suspended material
The gas most commonly associated with C. hydrogen sulfide
septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
How many cubic meters per second in 10 A. 0.44
MGD?
A. 0.44
B. 1.44
C. 4.73
D. 24.62
, ABC Wastewater collection Level 3
Mechanical ventilation of a lift station is C. reduce corrosion
required to
A. lower temperatures to reduce
proportion of hydrogen sulfide
B. reduce chlorine demand
C. reduce corrosion
D. increase DO in raw wastewater
A wet well probe is usually used for ________ D. single point
determination(s) of level.
A. approximate
B. dual point
C. continuous
D. single point
A pump is delivering at less than the D. discharge head too low
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
, ABC Wastewater collection Level 3
Metal pipes often fail because of C. galvanic action
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis
When a fire hydrant is operated, it should B. opened fully
be
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required
If the pump bearings on horizontal D. shaft or shaft sleeve will be damaged
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
, ABC Wastewater collection Level 3
If packing is not maintained properly, C. loss of suction due to air being allowed to enter pump
A. cavitation damage will result
B. impeller will corrode
C. loss of suction due to air being
allowed to enter pump
D. shaft or shaft sleeve will be damaged
In certain situations, a supervisor C. highly desirable, since it encourages employee growth
encourages the employees to make their
own decisions. This is considered to be
A. against the rules to follow past
experiences in decision-making
B. bad form since the supervisor
eventually loses control
C. highly desirable, since it encourages
employee growth and frees the
D. supervisor for other tasks
E. passing the buck
Turbidity in wastewater is caused by D. finely divided suspended material
A. color
B. dissolved calcium
C. hardness
D. finely divided suspended material
The gas most commonly associated with C. hydrogen sulfide
septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
How many cubic meters per second in 10 A. 0.44
MGD?
A. 0.44
B. 1.44
C. 4.73
D. 24.62
, ABC Wastewater collection Level 3
Mechanical ventilation of a lift station is C. reduce corrosion
required to
A. lower temperatures to reduce
proportion of hydrogen sulfide
B. reduce chlorine demand
C. reduce corrosion
D. increase DO in raw wastewater
A wet well probe is usually used for ________ D. single point
determination(s) of level.
A. approximate
B. dual point
C. continuous
D. single point
A pump is delivering at less than the D. discharge head too low
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
, ABC Wastewater collection Level 3
Metal pipes often fail because of C. galvanic action
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis
When a fire hydrant is operated, it should B. opened fully
be
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required
If the pump bearings on horizontal D. shaft or shaft sleeve will be damaged
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
, ABC Wastewater collection Level 3
If packing is not maintained properly, C. loss of suction due to air being allowed to enter pump
A. cavitation damage will result
B. impeller will corrode
C. loss of suction due to air being
allowed to enter pump
D. shaft or shaft sleeve will be damaged
In certain situations, a supervisor C. highly desirable, since it encourages employee growth
encourages the employees to make their
own decisions. This is considered to be
A. against the rules to follow past
experiences in decision-making
B. bad form since the supervisor
eventually loses control
C. highly desirable, since it encourages
employee growth and frees the
D. supervisor for other tasks
E. passing the buck
