ABC Wastewater collection Level 3 Exam QUESTIONS AND CORRECT
DETAILED ANSWERS WITH EXPLANATIONS (VERIFIED ANSWERS) A
NEW UPDATED VERSION LATEST| GUARANTEED A+
1. Turbidity in wastewater is caused by D. finely divided
A. color suspended material
B. dissolved calcium
C. hardness
D. finely divided suspended material
2. The gas most commonly associated with C. hydrogen sulfide
septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
3. How many cubic meters per second in 10 A. 0.44
MGD?
A. 0.44
B. 1.44
, C. 4.73
D. 24.62
4. 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
5. 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
6. A pump is delivering at less than the expected D. discharge head too
rate of discharge. Which of the causes listed low
below is incorrect?
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 D. shaft or shaft sleeve
pumps are over lubricated, the most important will be damaged
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
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
C. loss of suction due to air being allowed to
enter pump
DETAILED ANSWERS WITH EXPLANATIONS (VERIFIED ANSWERS) A
NEW UPDATED VERSION LATEST| GUARANTEED A+
1. Turbidity in wastewater is caused by D. finely divided
A. color suspended material
B. dissolved calcium
C. hardness
D. finely divided suspended material
2. The gas most commonly associated with C. hydrogen sulfide
septic wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
3. How many cubic meters per second in 10 A. 0.44
MGD?
A. 0.44
B. 1.44
, C. 4.73
D. 24.62
4. 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
5. 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
6. A pump is delivering at less than the expected D. discharge head too
rate of discharge. Which of the causes listed low
below is incorrect?
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 D. shaft or shaft sleeve
pumps are over lubricated, the most important will be damaged
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
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
C. loss of suction due to air being allowed to
enter pump
