Environmental Engineering – Study Guide, Key Concepts & Exam Preparation
Biochemical oxygen demand (BOD) - correct answer ✔✔is the amount of dissolved oxygen
needed by aerobic biological organisms in a body of water to break down organic material
present in a given water sample at certain temperature over a specific time period.
Fixed suspended solids - correct answer ✔✔(FSS) is the matter remaining from the suspended
solids analysis which will not burn at 550°C. It represents the non-filterable inorganic residue in
a sample.
ideal gas law - correct answer ✔✔PV=nRT
molarity - correct answer ✔✔Whereas mole fraction is a ratio of moles to moles, molar
concentration is a ratio of moles to volume.
molar - correct answer ✔✔mol/m^3
mole fraction - correct answer ✔✔...
partial pressure - correct answer ✔✔In a mixture of ideal gases, each gas has a partial pressure
which is the pressure which the gas would have if it alone occupied the volume.[1] The total
pressure of a gas mixture is the sum of the partial pressures of each individual gas in the
mixture.
units atm
ppb by mass - correct answer ✔✔10^9
mole fraction
, ppb by volume - correct answer ✔✔10^9
can be a volume fraction or a mole fraction
ppm by mass - correct answer ✔✔10^6
mole fraction
ppm volume - correct answer ✔✔10^9
can be a volume fraction or a mole fraction
ppt (parts per trillion) - correct answer ✔✔10^12
Total dissolved solids (TDS) - correct answer ✔✔is the amount of dissolved matter in the water.
TDS=VDS+FDS
total solids (TS) - correct answer ✔✔is the amount of organic and inorganic matter which is
contained in a water.
TS=TDS+TSS
Total Suspended solids - correct answer ✔✔(TSS) is the amount of suspended (filterable) matter
in a water.
TSS=VSS+FSS
total suspended particulates - correct answer ✔✔Tiny airborne particles or aerosols that are
less than 100 micrometers are collectively referred to as total suspended particulate matter
(TSP). These particles constantly enter the atmosphere from many sources.
Human sources include:
Biochemical oxygen demand (BOD) - correct answer ✔✔is the amount of dissolved oxygen
needed by aerobic biological organisms in a body of water to break down organic material
present in a given water sample at certain temperature over a specific time period.
Fixed suspended solids - correct answer ✔✔(FSS) is the matter remaining from the suspended
solids analysis which will not burn at 550°C. It represents the non-filterable inorganic residue in
a sample.
ideal gas law - correct answer ✔✔PV=nRT
molarity - correct answer ✔✔Whereas mole fraction is a ratio of moles to moles, molar
concentration is a ratio of moles to volume.
molar - correct answer ✔✔mol/m^3
mole fraction - correct answer ✔✔...
partial pressure - correct answer ✔✔In a mixture of ideal gases, each gas has a partial pressure
which is the pressure which the gas would have if it alone occupied the volume.[1] The total
pressure of a gas mixture is the sum of the partial pressures of each individual gas in the
mixture.
units atm
ppb by mass - correct answer ✔✔10^9
mole fraction
, ppb by volume - correct answer ✔✔10^9
can be a volume fraction or a mole fraction
ppm by mass - correct answer ✔✔10^6
mole fraction
ppm volume - correct answer ✔✔10^9
can be a volume fraction or a mole fraction
ppt (parts per trillion) - correct answer ✔✔10^12
Total dissolved solids (TDS) - correct answer ✔✔is the amount of dissolved matter in the water.
TDS=VDS+FDS
total solids (TS) - correct answer ✔✔is the amount of organic and inorganic matter which is
contained in a water.
TS=TDS+TSS
Total Suspended solids - correct answer ✔✔(TSS) is the amount of suspended (filterable) matter
in a water.
TSS=VSS+FSS
total suspended particulates - correct answer ✔✔Tiny airborne particles or aerosols that are
less than 100 micrometers are collectively referred to as total suspended particulate matter
(TSP). These particles constantly enter the atmosphere from many sources.
Human sources include:
