ENVR ENG 3200 | A+ Exam 1 – Complete,
Updated Questions with Verified Answers
List 2 other environmental episodes we discussed - ✔✔1. cuyahoga river (wastewater)
2. Rocky flats, CO (nuclear waste)
What dictates fate and transport of a chemical? - ✔✔concentration
what are units of Mass/Mass used for? - ✔✔Solids or water
commonly mg/kg (ppm) or micrograms/kg (ppb)
How many ppb are in 1 ppm - ✔✔1000 ppb
what are units of Mass/volume used for? - ✔✔air or water (different calculations, be careful)
commonly mg/L
Mass/Volume units in WATER - ✔✔typically mg/L or micrograms/L
we can express these in ppm and ppb IF we use the dilute water assumption (assume density
of sample is still approximately 1 kg/L)
Mass/Volume units in AIR - ✔✔typically mg/m^3 or micrograms/m^3
usually small
what is PPM by volume used for - ✔✔can be used in air/gases
, denoted PPMv
PPMv = ((V gas of interest)/(V total) )* 10^6
when we have a gas in PPMv which R constant do we use? - ✔✔8.205*10^-5
what are molar units (molarity and molality) used for? - ✔✔concentrations in water
often we convert molar units to ppm and vice versa
the goal of environmental engineering is to - ✔✔mitigate/minimize/alleviate impacts of
human actions on the environment to avoid adverse human health affects
minimize impact of development and industry on the environment, society, and HEALTH
What led to the sanitary awakening - ✔✔John Snow's work in the mid 1800's (1854 London
cholera outbreak
Early efforts of environmental engineers focused on - ✔✔1. managing waste to prevent
disease (mostly water)
2. drinking water treatment
What was the Donora Episode and when did it occur? - ✔✔Donora, PA 1948
The area had a zinc plant which was geographically contained by the surrounding region. Air
emissions were not controlled (smog was seen as a sign of progress by residents)
Inversion conditions developed (cold air and trapped emissions are low to the ground)
Sparked federal interest in air pollution control (1955 CAA)
Updated Questions with Verified Answers
List 2 other environmental episodes we discussed - ✔✔1. cuyahoga river (wastewater)
2. Rocky flats, CO (nuclear waste)
What dictates fate and transport of a chemical? - ✔✔concentration
what are units of Mass/Mass used for? - ✔✔Solids or water
commonly mg/kg (ppm) or micrograms/kg (ppb)
How many ppb are in 1 ppm - ✔✔1000 ppb
what are units of Mass/volume used for? - ✔✔air or water (different calculations, be careful)
commonly mg/L
Mass/Volume units in WATER - ✔✔typically mg/L or micrograms/L
we can express these in ppm and ppb IF we use the dilute water assumption (assume density
of sample is still approximately 1 kg/L)
Mass/Volume units in AIR - ✔✔typically mg/m^3 or micrograms/m^3
usually small
what is PPM by volume used for - ✔✔can be used in air/gases
, denoted PPMv
PPMv = ((V gas of interest)/(V total) )* 10^6
when we have a gas in PPMv which R constant do we use? - ✔✔8.205*10^-5
what are molar units (molarity and molality) used for? - ✔✔concentrations in water
often we convert molar units to ppm and vice versa
the goal of environmental engineering is to - ✔✔mitigate/minimize/alleviate impacts of
human actions on the environment to avoid adverse human health affects
minimize impact of development and industry on the environment, society, and HEALTH
What led to the sanitary awakening - ✔✔John Snow's work in the mid 1800's (1854 London
cholera outbreak
Early efforts of environmental engineers focused on - ✔✔1. managing waste to prevent
disease (mostly water)
2. drinking water treatment
What was the Donora Episode and when did it occur? - ✔✔Donora, PA 1948
The area had a zinc plant which was geographically contained by the surrounding region. Air
emissions were not controlled (smog was seen as a sign of progress by residents)
Inversion conditions developed (cold air and trapped emissions are low to the ground)
Sparked federal interest in air pollution control (1955 CAA)
