wastewater grade 2 exam
questions and answers(graded
A+)
what is the methane content in a properly operating anaerobic
digester? - answer 65 to 70% by volume
what is the purpose of a parshall flume - answer Measure flow rate
what is the typical removal efficiency of settleable solids in a
primary clarifier? - answer 95 to 99%
what might cause thick billows of white sudsy foam in the aeration
tank? - answer MLSS is too low
what does the "M" in F/M ratio represent? - answer The mixed liquor
volatile suspended solids in the aeration tank
In general, how will warmer temperature affect the settling rate of
solids in a clarifier? - answer Increase the settling rate
Which of the following is true about a positive displacement pump? -
answer It must never be started with the discharge valve closed
which of the following is one of the basic rules of laboratory work? -
answer never pipet hazardous material with your mouth, even if the
pipet has been sterilized
what is the purpose of the grit channel? - answer Remove heavy
inorganic wastes
, what is the correct formula for solids in raw wastewater? - answer
non-settleable solids + settleable solids = total suspended solids
What is freeboard in a waste stabilization pond? - answer the
vertical distance from normal water surface to the top of the levee
prior to entering a permit-required confined space, what should you
verify? - answer a standby person should be located outside the
entrance to the confined space, while another person should be
within sight or call of the standby person.
what is a common way to determine the organic strength of wastes
in the influent? - answer test for the biochemical oxygen demand
what should you do if you are mildly exposed to chlorine gas? -
answer immediately evacuate the contaminated area, remain clam,
keep warm, breathe lightly, and avoid coughing
what are the main sources of domestic sewage in the collection
system? - answer households and commercial establishments
what are mostly removed in the grit channel? - answer sand,
eggshells, cinders, and heavier particulate matter
which gas diminished your sense of smell? - answer hydrogen
sulfide
which of the following enters the headworks of a treatment plant? -
answer influent
what is the equivalent of 1 mg/L? - answer 1 ppm
questions and answers(graded
A+)
what is the methane content in a properly operating anaerobic
digester? - answer 65 to 70% by volume
what is the purpose of a parshall flume - answer Measure flow rate
what is the typical removal efficiency of settleable solids in a
primary clarifier? - answer 95 to 99%
what might cause thick billows of white sudsy foam in the aeration
tank? - answer MLSS is too low
what does the "M" in F/M ratio represent? - answer The mixed liquor
volatile suspended solids in the aeration tank
In general, how will warmer temperature affect the settling rate of
solids in a clarifier? - answer Increase the settling rate
Which of the following is true about a positive displacement pump? -
answer It must never be started with the discharge valve closed
which of the following is one of the basic rules of laboratory work? -
answer never pipet hazardous material with your mouth, even if the
pipet has been sterilized
what is the purpose of the grit channel? - answer Remove heavy
inorganic wastes
, what is the correct formula for solids in raw wastewater? - answer
non-settleable solids + settleable solids = total suspended solids
What is freeboard in a waste stabilization pond? - answer the
vertical distance from normal water surface to the top of the levee
prior to entering a permit-required confined space, what should you
verify? - answer a standby person should be located outside the
entrance to the confined space, while another person should be
within sight or call of the standby person.
what is a common way to determine the organic strength of wastes
in the influent? - answer test for the biochemical oxygen demand
what should you do if you are mildly exposed to chlorine gas? -
answer immediately evacuate the contaminated area, remain clam,
keep warm, breathe lightly, and avoid coughing
what are the main sources of domestic sewage in the collection
system? - answer households and commercial establishments
what are mostly removed in the grit channel? - answer sand,
eggshells, cinders, and heavier particulate matter
which gas diminished your sense of smell? - answer hydrogen
sulfide
which of the following enters the headworks of a treatment plant? -
answer influent
what is the equivalent of 1 mg/L? - answer 1 ppm
