ABC Wastewater Level 3 CERTIFICATION EXAM - General |
FREQUENTLY TESTED QUESTIONS WITH CORRECT
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ABC Wastewater Treatment Grade 3 ... Wastewater Level 3 - Activated Slud... Wastewater: Exam 3: Tertiary Treatm... MC
56 terms 97 terms Teacher 36 terms Te
Jtborin Preview learning_tech Preview Mr_Brian_W_Rivers Preview
Terms in this set (230)
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 septic C. hydrogen sulfide
wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
How many cubic meters per second in 10 MGD? A. 0.44
A. 0.44
B. 1.44
C. 4.73
D. 24.62
Mechanical ventilation of a lift station is required to C. reduce corrosion
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 expected rate of D. discharge head too low
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
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 be B. opened fully
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 centrifugal pumps D. shaft or shaft sleeve will be damaged
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
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
Air flow through a trickling filter when the influent is A. upward through the filter
warmer than the air temperature is
A. upward through the filter
B. downward through the filter
C. inadequate and may require forced air ventilation
D. improved by decreasing the recirculation
, An active sludge in the aeration tank with an abundant B. high oxygen uptake and slow settling rate
available food supply will have a relatively
A. high oxygen uptake and fast settling rate
B. high oxygen uptake and slow settling rate
C. low oxygen uptake and fast settling rate
D. low oxygen uptake and slow settling rate
The reaction of chlorine and ammonia produces a C. chloramine
compound which is called
A. ammonium chloride
B. chloral hydrate
C. chloramine
D. hydrazine
A malfunctioning gas chlorination system has normal C. injector clogged
gas pressure, no feed rate indicated on rotometer, and
no injector vacuum. What is the most likely cause of the
problem?
A. air leak upstream of rotameter
B. gas line plugged
C. injector clogged
D. pressure reducing valve diaphragm ruptured
What is the impact of increased viscosity on the B. less effective
effectiveness of mixed media filters?
Mixed media filters are
A. affected only if temperature also changes
B. less effective
C. more effective
D. not affected
The precipitate in coagulation with alum is aluminum C. hydroxide
A. bicarbonate
B. carbonate
C. hydroxide
D. sulfate
Given the following data, what is the most likely cause C. sheared pin or disengaged clutch
of the mechanically cleaned bar screen problem?
DATA: Above normal water differential across bar
screen
Drive motor shaft turning
Drive sprocket, chain, rake not moving
Less than normal flow on bar screen downstream side
Bar screen mode selector in automatic position
Normal seasonal flow (influent) coming into bar screen
Alarm systems operating normally
A. low influent (incoming) level
B. raw wastewater pumping units out of service
C. sheared pin or disengaged clutch
D. none of the above
FREQUENTLY TESTED QUESTIONS WITH CORRECT
ANSWERS | BRAND NEW!
Leave the first rating
Save
Students also studied
Flashcard sets Study guides
ABC Wastewater Treatment Grade 3 ... Wastewater Level 3 - Activated Slud... Wastewater: Exam 3: Tertiary Treatm... MC
56 terms 97 terms Teacher 36 terms Te
Jtborin Preview learning_tech Preview Mr_Brian_W_Rivers Preview
Terms in this set (230)
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 septic C. hydrogen sulfide
wastewater is
A. carbon dioxide
B. carbon monoxide
C. hydrogen sulfide
D. methane
How many cubic meters per second in 10 MGD? A. 0.44
A. 0.44
B. 1.44
C. 4.73
D. 24.62
Mechanical ventilation of a lift station is required to C. reduce corrosion
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 expected rate of D. discharge head too low
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
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 be B. opened fully
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 centrifugal pumps D. shaft or shaft sleeve will be damaged
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
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
Air flow through a trickling filter when the influent is A. upward through the filter
warmer than the air temperature is
A. upward through the filter
B. downward through the filter
C. inadequate and may require forced air ventilation
D. improved by decreasing the recirculation
, An active sludge in the aeration tank with an abundant B. high oxygen uptake and slow settling rate
available food supply will have a relatively
A. high oxygen uptake and fast settling rate
B. high oxygen uptake and slow settling rate
C. low oxygen uptake and fast settling rate
D. low oxygen uptake and slow settling rate
The reaction of chlorine and ammonia produces a C. chloramine
compound which is called
A. ammonium chloride
B. chloral hydrate
C. chloramine
D. hydrazine
A malfunctioning gas chlorination system has normal C. injector clogged
gas pressure, no feed rate indicated on rotometer, and
no injector vacuum. What is the most likely cause of the
problem?
A. air leak upstream of rotameter
B. gas line plugged
C. injector clogged
D. pressure reducing valve diaphragm ruptured
What is the impact of increased viscosity on the B. less effective
effectiveness of mixed media filters?
Mixed media filters are
A. affected only if temperature also changes
B. less effective
C. more effective
D. not affected
The precipitate in coagulation with alum is aluminum C. hydroxide
A. bicarbonate
B. carbonate
C. hydroxide
D. sulfate
Given the following data, what is the most likely cause C. sheared pin or disengaged clutch
of the mechanically cleaned bar screen problem?
DATA: Above normal water differential across bar
screen
Drive motor shaft turning
Drive sprocket, chain, rake not moving
Less than normal flow on bar screen downstream side
Bar screen mode selector in automatic position
Normal seasonal flow (influent) coming into bar screen
Alarm systems operating normally
A. low influent (incoming) level
B. raw wastewater pumping units out of service
C. sheared pin or disengaged clutch
D. none of the above
