Name: Score:
80 Multiple choice questions
Term 1 of 80
When would you expect reduced algae population and less oxygen released into a pond?
spring and summer, when temperatures are high and sunlight is abundant
fall and winter, when the weather is cool and sunlight is reduced
early morning hours, when temperatures are at their peak
nighttime, when all aquatic life is dormant
Term 2 of 80
The organic loading to a trickle filter is expressed as?
lbs BOD/day/1,00ft3(cubed)
the total suspended solids in the influent
the volume of sludge produced per week
gallons of water treated per day
Term 3 of 80
What should you do if you are mildly exposed to chlorine gas?
drink plenty of water to dilute the chlorine gas
wait for the gas to dissipate before moving
immediately evacuate the contaminated area, remian calm, keep warm. breath lightly, avoid
coughing
apply a cold compress to the face and neck
,Term 4 of 80
What is the recirculation ratio for a trickling filter?
Residual Chlorine
Qr/Q
Cross Connection
Activated Sludge
Term 5 of 80
What might cause sludge to rise in a clarifier?
to prevent short circuiting
activated sludge
photosynthesis
gasification from aging sludge
Term 6 of 80
Which of the following is one of the basic rules of lab work?
never pipet hazardous material with your mouth, even if the pipet has been sterialized
using a pipet is unnecessary in laboratory work
pipetting is safe as long as the material is diluted
always use your mouth to pipet non-hazardous materials
, Term 7 of 80
What is an MCRT?
a measure of the total biomass in the reactor
the total time taken for wastewater treatment
the rate at which microorganisms reproduce
an expression of the average time a microorganism will spend in an activated sludge
proccess
Term 8 of 80
What is the typical concentration of mixed liquor suspended solids in a conventional activated
sludge process?
6000 to 8000 mg/l
1000 to 4500 mg/l
2000 to 3000 mg/l
500 to 1000 mg/l
Term 9 of 80
What type of treatment is primarily used to thicken sludge instead of dewater the sludge?
Decrease The Ph
DAF Dissolved Air Flotation
Could Lead To Asphyxiation
Aerobic Bacteria
80 Multiple choice questions
Term 1 of 80
When would you expect reduced algae population and less oxygen released into a pond?
spring and summer, when temperatures are high and sunlight is abundant
fall and winter, when the weather is cool and sunlight is reduced
early morning hours, when temperatures are at their peak
nighttime, when all aquatic life is dormant
Term 2 of 80
The organic loading to a trickle filter is expressed as?
lbs BOD/day/1,00ft3(cubed)
the total suspended solids in the influent
the volume of sludge produced per week
gallons of water treated per day
Term 3 of 80
What should you do if you are mildly exposed to chlorine gas?
drink plenty of water to dilute the chlorine gas
wait for the gas to dissipate before moving
immediately evacuate the contaminated area, remian calm, keep warm. breath lightly, avoid
coughing
apply a cold compress to the face and neck
,Term 4 of 80
What is the recirculation ratio for a trickling filter?
Residual Chlorine
Qr/Q
Cross Connection
Activated Sludge
Term 5 of 80
What might cause sludge to rise in a clarifier?
to prevent short circuiting
activated sludge
photosynthesis
gasification from aging sludge
Term 6 of 80
Which of the following is one of the basic rules of lab work?
never pipet hazardous material with your mouth, even if the pipet has been sterialized
using a pipet is unnecessary in laboratory work
pipetting is safe as long as the material is diluted
always use your mouth to pipet non-hazardous materials
, Term 7 of 80
What is an MCRT?
a measure of the total biomass in the reactor
the total time taken for wastewater treatment
the rate at which microorganisms reproduce
an expression of the average time a microorganism will spend in an activated sludge
proccess
Term 8 of 80
What is the typical concentration of mixed liquor suspended solids in a conventional activated
sludge process?
6000 to 8000 mg/l
1000 to 4500 mg/l
2000 to 3000 mg/l
500 to 1000 mg/l
Term 9 of 80
What type of treatment is primarily used to thicken sludge instead of dewater the sludge?
Decrease The Ph
DAF Dissolved Air Flotation
Could Lead To Asphyxiation
Aerobic Bacteria
