Exam (elaborations)
CA GRADE 2 WASTEWATER TREATMENT OPERATOR PRACTICE EXAM 4 QUESTIONS AND ANSWERS
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CA GRADE 2 WASTEWATER TREATMENT OPERATOR PRACTICE EXAM 4 QUESTIONS AND ANSWERS
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Name: Score:80 Multiple choice questions
Term 1 of 80
What could happen if the intake of a progressing cavity pump is not kept wet?
increase do in aeration tank
damage pump
concrete structures
ponding
Term 2 of 80
What does anaerobic bacteria require for metabolism?
the amount of microorganisms in the aeration tank to treat the incoming waste
they thrive in environments with high levels of nitrogen
they obtain oxygen by breaking down chemical compounds that contain oxygen, such as
sulfite
they require sunlight to produce energy through photosynthesis
Term 3 of 80
Preventative maintenence is a proactive, programmed, and......
remote location
to keep the packing cool
systematic approach to maintenance
detention time
,Term 4 of 80
In domestic wastewater system, how many pounds of oxygen are used each day by the
microorganisms for each person using the system?
.1 lbs/day/person (roughly equal to .05 lb/day/person)
.5 lbs/day/person (approximately equal to .4 lb/day/person)
.25 lbs/day/person (approximately equal to .3 lb/day/person)
.17 lbs/day/person (roughly equal to .2 lb/day/person)
Term 5 of 80
Algae growth will be faster when there is less sunlight
True
False
Term 6 of 80
Abnormal operation in a pond will not occur if it is overloaded with BOD
True
False
Term 7 of 80
Chlorine gas is brown in color
Short circuiting
1,000 to 4,500 mg/l
Mechanical grit collectors
False = yellow green
,Term 8 of 80
What would cause a trickling filter to operate less effectively
Ponding
Coning
Field Capacity
Gutters
Term 9 of 80
Screening is a part of the pretreatment process that removes what?
chemical contaminants dissolved in the water
microorganisms that cause waterborne diseases
larger debris, such as rocks, cans and bottles
nutrients that promote algae growth
Term 10 of 80
Anaerobic decomposition of sweage will release?
chlorine
sulfur dioxide
hydrogen sulfide
carbon monoxide
Term 11 of 80
MRCT describes the average residence time of the activated sludge particle in the return
sludge pipe
True
False
, Term 12 of 80
Sulfur dioxide is used to dechlorinate the effluent prior to discharge to protect what?
detect toxicity in the activated sludge process
aquatic organisms in the recieving waters
prevent liquid from flowing in the reverse direction
increase do in aeration tank
Term 13 of 80
A Discharge Monitoring Report is typically submitted to the regulatory agency on daily basis
Ponding
False = Monthly
Detention time
False = yellow green
Term 14 of 80
Poor ventilation of a trickling filter could lead to what?
detention time
to keep the packing cool
lead to odor problems
ponding
Term 15 of 80
Free chlorine combines with water to form?
4 to 8% dry solids
hypochlorous and hydrochloric acids
grease and other floatable materials
they will pass through a filter
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