Wastewater Grade 4with well illustrated questions
and answers
COD - CORRECT ANSWERS-Chemical Oxygen Demand
Sensors used in continuous monitoring program should not require frequent ... - CORRECT ANSWERS-
Calibration to maintain their accuracy
Sulfuric Acid - CORRECT ANSWERS-H2SO4
Out of pH, suspended solids, BOD, COD, which one can be monitored continuously? - CORRECT
ANSWERS-pH (temperature as well)
The easiest way to evaluate absorption of organics in a carbon column is to perform ... - CORRECT
ANSWERS-Analysis of dissolved organics
BOD - CORRECT ANSWERS-biochemical oxygen demand, amount of dissolved oxygen needed by aerobic
decomposers to break down organic materials
Prior to using a buret for titration, The burette should be rinsed out with - CORRECT ANSWERS-Distilled
water
POTW - CORRECT ANSWERS-Publicly Owned Treatment Works
Receiving Waters - CORRECT ANSWERS-all distinct bodies of water that receive runoff such as streams,
lakes and rivers from a POTW
Sodium hypochlorite is used as a - CORRECT ANSWERS-Liquid
,Suspended Solids (SS) - CORRECT ANSWERS-Anything that settles to the bottom of the receiving water
and smothers living things
Oils and Grease (O&G) - CORRECT ANSWERS-Anything that will float on top of receiving and prevents
oxygen from being added
Total solids = suspended solids & WHAT? solids. - CORRECT ANSWERS-Dissolved
Grease entering a waste water treatment plant is removed by - CORRECT ANSWERS-Skimming
Biochemical Oxygen Demand (BOD) - CORRECT ANSWERS-Anything that consumes oxygen preventing
fish etc. from getting oxygen they need
No industrial facility shall discharge to a POTW a waste stream with a pH lower than - CORRECT
ANSWERS-5.5
Suspended Solids are removed by - CORRECT ANSWERS-Settling
Oils and Grease are removed by - CORRECT ANSWERS-Skimming
To determine the amount of organic material present in an industrial waste stream you would use -
CORRECT ANSWERS-A BOD test
BOD is removed by - CORRECT ANSWERS-Aeration and microorganisms
Valves used to open or close only are - CORRECT ANSWERS-Ball valves (small piping)
Gate valves (large piping)
,Along with the SS, O&G and BOD POTWs also prohibit the discharge of - CORRECT ANSWERS-1. Anything
creating fire/explosion hazard
- worker safety
2. Anything with pH below 5.0
- acidic water dissolves concrete piping and tanks
3. Anything that obstructs flow or is a solid. - clogs piping and restricts flow
4. Anything above 104 F
- kills organisms and bacteria
5. Anything creates toxic gas
- worker safety
6. No priority pollutants Toxic Organics TTO's
- kills organisms and bacteria
7. No heavy metals
- kills organisms and bacteria and contaminates settled solids
Biomass or biosolids - CORRECT ANSWERS-A clump of organic material consisting of living organisms
feeding on wastes and other debris
Pulp and Paper Industry - CORRECT ANSWERS-High BOD, COD and suspended solids
Mesh equals the number of holes - CORRECT ANSWERS-Per inch
Battery Manufacturing - CORRECT ANSWERS-Lead and Acids
Slurry - CORRECT ANSWERS-The suspension of water and another solid material that does not dissolve
i.e. lime slurry
, Petroleum Industry - CORRECT ANSWERS-High suspended solids, dissolved solids and oils
Gate valves are most commonly used for - CORRECT ANSWERS-Lime slurries
Blinding - CORRECT ANSWERS-When a screen type filter clogged because all it's pores are plugged up
Turbidity - CORRECT ANSWERS-Measurement of the cloudiness of a water stream. Typically, this is due
to suspended or colloidal solids and they won't settle because they are so small
Iron and Steel Industry - CORRECT ANSWERS-Toxic organics, dissolved salts, oils, acids and solvents
Volatile - CORRECT ANSWERS-A substance i.e. methanol gasoline that can be evaporated at a relatively
low temperature
Dairy Industry - CORRECT ANSWERS-High BOD and suspended solids
Plastics Industry - CORRECT ANSWERS-High Temperatures, oils and coolants
Because lime slurries need to be vigorously agitated or the lime will settle out and clog everything,
there's only on type of pump used - CORRECT ANSWERS-Centrifugal
Tanning Industry - CORRECT ANSWERS-High salts, high BOD, suspended solids
Meat Packing Industry - CORRECT ANSWERS-High BOD and suspended solids
and answers
COD - CORRECT ANSWERS-Chemical Oxygen Demand
Sensors used in continuous monitoring program should not require frequent ... - CORRECT ANSWERS-
Calibration to maintain their accuracy
Sulfuric Acid - CORRECT ANSWERS-H2SO4
Out of pH, suspended solids, BOD, COD, which one can be monitored continuously? - CORRECT
ANSWERS-pH (temperature as well)
The easiest way to evaluate absorption of organics in a carbon column is to perform ... - CORRECT
ANSWERS-Analysis of dissolved organics
BOD - CORRECT ANSWERS-biochemical oxygen demand, amount of dissolved oxygen needed by aerobic
decomposers to break down organic materials
Prior to using a buret for titration, The burette should be rinsed out with - CORRECT ANSWERS-Distilled
water
POTW - CORRECT ANSWERS-Publicly Owned Treatment Works
Receiving Waters - CORRECT ANSWERS-all distinct bodies of water that receive runoff such as streams,
lakes and rivers from a POTW
Sodium hypochlorite is used as a - CORRECT ANSWERS-Liquid
,Suspended Solids (SS) - CORRECT ANSWERS-Anything that settles to the bottom of the receiving water
and smothers living things
Oils and Grease (O&G) - CORRECT ANSWERS-Anything that will float on top of receiving and prevents
oxygen from being added
Total solids = suspended solids & WHAT? solids. - CORRECT ANSWERS-Dissolved
Grease entering a waste water treatment plant is removed by - CORRECT ANSWERS-Skimming
Biochemical Oxygen Demand (BOD) - CORRECT ANSWERS-Anything that consumes oxygen preventing
fish etc. from getting oxygen they need
No industrial facility shall discharge to a POTW a waste stream with a pH lower than - CORRECT
ANSWERS-5.5
Suspended Solids are removed by - CORRECT ANSWERS-Settling
Oils and Grease are removed by - CORRECT ANSWERS-Skimming
To determine the amount of organic material present in an industrial waste stream you would use -
CORRECT ANSWERS-A BOD test
BOD is removed by - CORRECT ANSWERS-Aeration and microorganisms
Valves used to open or close only are - CORRECT ANSWERS-Ball valves (small piping)
Gate valves (large piping)
,Along with the SS, O&G and BOD POTWs also prohibit the discharge of - CORRECT ANSWERS-1. Anything
creating fire/explosion hazard
- worker safety
2. Anything with pH below 5.0
- acidic water dissolves concrete piping and tanks
3. Anything that obstructs flow or is a solid. - clogs piping and restricts flow
4. Anything above 104 F
- kills organisms and bacteria
5. Anything creates toxic gas
- worker safety
6. No priority pollutants Toxic Organics TTO's
- kills organisms and bacteria
7. No heavy metals
- kills organisms and bacteria and contaminates settled solids
Biomass or biosolids - CORRECT ANSWERS-A clump of organic material consisting of living organisms
feeding on wastes and other debris
Pulp and Paper Industry - CORRECT ANSWERS-High BOD, COD and suspended solids
Mesh equals the number of holes - CORRECT ANSWERS-Per inch
Battery Manufacturing - CORRECT ANSWERS-Lead and Acids
Slurry - CORRECT ANSWERS-The suspension of water and another solid material that does not dissolve
i.e. lime slurry
, Petroleum Industry - CORRECT ANSWERS-High suspended solids, dissolved solids and oils
Gate valves are most commonly used for - CORRECT ANSWERS-Lime slurries
Blinding - CORRECT ANSWERS-When a screen type filter clogged because all it's pores are plugged up
Turbidity - CORRECT ANSWERS-Measurement of the cloudiness of a water stream. Typically, this is due
to suspended or colloidal solids and they won't settle because they are so small
Iron and Steel Industry - CORRECT ANSWERS-Toxic organics, dissolved salts, oils, acids and solvents
Volatile - CORRECT ANSWERS-A substance i.e. methanol gasoline that can be evaporated at a relatively
low temperature
Dairy Industry - CORRECT ANSWERS-High BOD and suspended solids
Plastics Industry - CORRECT ANSWERS-High Temperatures, oils and coolants
Because lime slurries need to be vigorously agitated or the lime will settle out and clog everything,
there's only on type of pump used - CORRECT ANSWERS-Centrifugal
Tanning Industry - CORRECT ANSWERS-High salts, high BOD, suspended solids
Meat Packing Industry - CORRECT ANSWERS-High BOD and suspended solids
