What is the volume of 1 ft3 of water?
8.34 gal
62.4 gal
92.84 gal
7.48 gal
What is considered to be a neutral pH?
6.5
14.0
10.0
7.0
What does the units parts per million (ppm) mean ?
1 pound per million gallons
1 gallon per million pounds
8.34 pounds per million gallons
10 milligrams per liter
Which is the biological process that follows primary treatment?
Preliminary treatement
Tertiary treatement
Activated sludge process
Secondary clarification
Chlorination
Which of the following is considered to be the least harmful bacteria?
Typhoid
Fecal coliform
Cholera
Streptococcus
Which is the physical process that follows an aeration tank?
Tertiary treatment
What does the unit parts per million (ppm) mean?
1 pound per million pounds
1 gallon per million gallons
1 milligram per liter
All of the available answers
None of the available answers
What is another term for inorganic solids?
Volatile
Non-volatile
Dissolved
Soluble
What does the term aliquot mean?
Composite sample
Grab sample
The total volume of sample
A portion of a sample
What is the BOD test a measure of ?
Suspended solids
Organic content
Dissolved solids
Alkalinity
Which type of wastewater typically has the highest demand for oxygen?
Domestic
Storm water
Sanitary
Industrial
What is the correct incubation time and temperature for the BOD test?
5 days at 20°F
5 days at 20°C
20 days at 5°C
5 days at 68°C
What is the term for a liquid or sludge with a pH of 6.0?
Alkaline
Neutral
Basic
Acidic
What are very small, finely-divided solids known as:
Settleable
Total
Colloidal
Inert
Which of the following best describes the term anoxic?
High dissolved oxygen is present
Nearly anaerobic; very low dissolved oxygen but nitrates and/or nitrites are present
Completely anaerobic; no dissolved oxygen, nitrates, or nitrites
Nitrates are very low
Which is a higher life form in the activated sludge process.... a free swimming ciliate, a stalked ciliate, or a rotifer?
Free swimming ciliate
Stalked ciliate
Rotifer
They are all the same
Which term describes the conversion of ammonia nitrogen to oxidized (usually nitrate)?
Fermentation
Log Growth
Nitrification
Denitrification
What will organic material do in a muffle furnace?
it will burn
it will not burn
it will change to inorganic material
It will convert to dissolved solids
What is the best definition of a shock load?
An unexpected bump
A strong influent waste strength
A high concentration of TSS
A heavy truck load entering the plant
Which environment does filamentous bacteria like best?
Aerobic
Anaerobic
Facultative
Anoxic
What does one cubic foot of water weigh at 4°C?
7.48 pounds
8.34 pounds
3.14159 pounds
62.4 pounds
What is a higher life form in the activated sludge process....a free swimming ciliate or a stalked ciliate?
They are both the same
Rotifers are younger than free swimmers
What does "F" mean in the process parameter F/M ratio?
lbs/day volatile microorganisms
gpd plant flow
lbs/day influent CBODs
gpd waste sludge
What does the term adsorption mean?
Impregnate a liquid with air
The taking in of one substance into the body of another
To gather onto the surface of a substance
Soak like a sponge
What does the term loading refer to?
The pounds of MLVSS under aeration
The cfm of air supplied to the aeration tank
The pounds of BOD entering the aeration tank
The amount of waste sludge removed from the system
Which two age parameters are most similar to each other?
GSA and F/M ratio
SRT and MCRT
SRT and GSA
GSA and MCRT
What type of solids cannot be removed with typical effluent filters?
Suspended
What is not a typical loading equivalent in domestic wastewater?
About 0.17 lbs BOD/person/day
About 0.2 lbs TSS/person/day
About 100 gal/person/day
About 100 mg/l /NH3/person/day
What does the "M" mean in the process parameter F/M ratio?
lbs volatile microorganisms in aeration
lbs/day influent BOD entering aeration
gpd waste sludge leaving aeration
Which has a higher pH, sodium hydroxide or aluminum sulfate?
Aluminum sulfate
Sodium hydroxide
Alum has a high PH
What is a typical loading equivalent for TSS in domestic wastewater?
About 0.17 lbs/person/day
About 0.2 lbs/person/day
About 300 gal/person/day
About 200 mg/L /person/day
What type of solids are identified in a muffle furnace test?
What is the main difference between a conventional activated sludge process and an advanced wastewater treatment process?
CBOD5 Removal
TSS removal
Nitrogen & phosphorus removal
Metals removal