ABC WASTEWATER LEVEL 3 EXAM |
ADVANCED WASTEWATER
TREATMENT CERTIFICATION PREP
QUESTIONS AND CORRECT
ANSWERS
Turbidity in wastewater is caused by
A. color
B. dissolved calcium
C. hardness
D. finely divided suspended material - CORRECT ANSWER-D. finely
divided suspended material
The gas most commonly associated with septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
,D. methane - CORRECT ANSWER-C. hydrogen sulfide
How many cubic meters per second in 10 MGD?
A. 0.44
B. 1.44
C. 4.73
D. 24.62 - CORRECT ANSWER-A. 0.44
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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-D. discharge head
too low
Metal pipes often fail because of
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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
D. shaft or shaft sleeve will be damaged - CORRECT ANSWER-C. loss
of suction due to air being allowed to enter pump
Air flow through a trickling filter when the influent is warmer than the
air temperature is
A. upward through the filter
B. downward through the filter
ADVANCED WASTEWATER
TREATMENT CERTIFICATION PREP
QUESTIONS AND CORRECT
ANSWERS
Turbidity in wastewater is caused by
A. color
B. dissolved calcium
C. hardness
D. finely divided suspended material - CORRECT ANSWER-D. finely
divided suspended material
The gas most commonly associated with septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
,D. methane - CORRECT ANSWER-C. hydrogen sulfide
How many cubic meters per second in 10 MGD?
A. 0.44
B. 1.44
C. 4.73
D. 24.62 - CORRECT ANSWER-A. 0.44
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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-D. discharge head
too low
Metal pipes often fail because of
A. back siphonage
B. browning movement
C. galvanic action
D. reverse osmosis - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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
D. shaft or shaft sleeve will be damaged - CORRECT ANSWER-C. loss
of suction due to air being allowed to enter pump
Air flow through a trickling filter when the influent is warmer than the
air temperature is
A. upward through the filter
B. downward through the filter
