ABC Wastewater collection Level 3
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1. Turbidity in wastewater is caused by D. finely divided suspend-
A. color ed material
B. dissolved calcium
C. hardness
D. finely divided suspended material
2. The gas most commonly associated with septic waste- C. hydrogen sulfide
water is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
3. How many cubic meters per second in 10 MGD? A. 0.44
A. 0.44
B. 1.44
C. 4.73
D. 24.62
4. Mechanical ventilation of a lift station is required to C. reduce corrosion
A. lower temperatures to reduce proportion of hydro-
gen sulfide
B. reduce chlorine demand
C. reduce corrosion
D. increase DO in raw wastewater
5. A wet well probe is usually used for ________ determina- D. single point
tion(s) of level.
A. approximate
B. dual point
C. continuous
D. single point
, ABC Wastewater collection Level 3
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6. A pump is delivering at less than the expected rate of D. discharge head too low
discharge. Which of the causes listed below is incor-
rect?
A. speed of motor too low
B. pump not primed
C. impeller clogged
D. discharge head too low
7. Metal pipes often fail because of C. galvanic action
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis
8. When a fire hydrant is operated, it should be B. opened fully
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required
9. If the pump bearings on horizontal centrifugal pumps D. shaft or shaft sleeve will
are over lubricated, the most important effect is that be damaged
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
10. If packing is not maintained properly, C. loss of suction due to
A. cavitation damage will result air being allowed to enter
B. impeller will corrode pump
, ABC Wastewater collection Level 3
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C. loss of suction due to air being allowed to enter
pump
D. shaft or shaft sleeve will be damaged
11. In certain situations, a supervisor encourages the em- C. highly desirable, since
ployees to make their own decisions. This is considered it encourages employee
to be growth
A. against the rules to follow past experiences in deci-
sion-making
B. bad form since the supervisor eventually loses con-
trol
C. highly desirable, since it encourages employee
growth and frees the
D. supervisor for other tasks
E. passing the buck
12. Successful communication requires mutual D. understanding
A. agreement
B. confusion
C. transmission
D. understanding
13. When a great deal of authority is delegated on many C. decentralized
levels, an organization may be described as
A. authoritarian
B. centralized
C. decentralized
D. unstructured
14. Recognition and job security are indications of A. a good organization
A. a good organization
B. a good supervisor
Study online at https://quizlet.com/_4p8jnn
1. Turbidity in wastewater is caused by D. finely divided suspend-
A. color ed material
B. dissolved calcium
C. hardness
D. finely divided suspended material
2. The gas most commonly associated with septic waste- C. hydrogen sulfide
water is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
3. How many cubic meters per second in 10 MGD? A. 0.44
A. 0.44
B. 1.44
C. 4.73
D. 24.62
4. Mechanical ventilation of a lift station is required to C. reduce corrosion
A. lower temperatures to reduce proportion of hydro-
gen sulfide
B. reduce chlorine demand
C. reduce corrosion
D. increase DO in raw wastewater
5. A wet well probe is usually used for ________ determina- D. single point
tion(s) of level.
A. approximate
B. dual point
C. continuous
D. single point
, ABC Wastewater collection Level 3
Study online at https://quizlet.com/_4p8jnn
6. A pump is delivering at less than the expected rate of D. discharge head too low
discharge. Which of the causes listed below is incor-
rect?
A. speed of motor too low
B. pump not primed
C. impeller clogged
D. discharge head too low
7. Metal pipes often fail because of C. galvanic action
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis
8. When a fire hydrant is operated, it should be B. opened fully
A. just opened enough to have a flow
B. opened fully
C. opened halfway
D. regulated to flow required
9. If the pump bearings on horizontal centrifugal pumps D. shaft or shaft sleeve will
are over lubricated, the most important effect is that be damaged
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
10. If packing is not maintained properly, C. loss of suction due to
A. cavitation damage will result air being allowed to enter
B. impeller will corrode pump
, ABC Wastewater collection Level 3
Study online at https://quizlet.com/_4p8jnn
C. loss of suction due to air being allowed to enter
pump
D. shaft or shaft sleeve will be damaged
11. In certain situations, a supervisor encourages the em- C. highly desirable, since
ployees to make their own decisions. This is considered it encourages employee
to be growth
A. against the rules to follow past experiences in deci-
sion-making
B. bad form since the supervisor eventually loses con-
trol
C. highly desirable, since it encourages employee
growth and frees the
D. supervisor for other tasks
E. passing the buck
12. Successful communication requires mutual D. understanding
A. agreement
B. confusion
C. transmission
D. understanding
13. When a great deal of authority is delegated on many C. decentralized
levels, an organization may be described as
A. authoritarian
B. centralized
C. decentralized
D. unstructured
14. Recognition and job security are indications of A. a good organization
A. a good organization
B. a good supervisor
