SWS exam 2 Verified Questions and
Answers
Helicobacter pylori is typically NOT considered to be a problem in developed nations -
CORRECT ANSWER-true
What type of water system has the greatest number of outbreaks - CORRECT
ANSWER-community
which of the following are among the...
SWS exam 2 Verified Questions and
Answers
Helicobacter pylori is typically NOT considered to be a problem in developed nations -
CORRECT ANSWER-true
What type of water system has the greatest number of outbreaks - CORRECT
ANSWER-community
which of the following are among the barriers that failed in the Walkerton outbreak? -
CORRECT ANSWER-mointoring, treatment, source protection, reporting
what is the best way to remove cryptosporidium from drinking water - CORRECT
ANSWER-filtration
which of the fllowing cauzes watery diarrhea - CORRECT ANSWER-ETEC,
Cryptosporidium
what were the primary pathogens in the walkerton outbreak - CORRECT ANSWER-
EHEC, campylobacter
the cholera pathogen CANNOT be considered to be a frank pathogen - CORRECT
ANSWER-
E. coli O157:H7 is an enterohaemorragic strain of e. coli - CORRECT ANSWER-true
a waterborne pathogen is a - CORRECT ANSWER-pathogen that originated in water
contaminated by fecal material
in the notorious milwaukee cryptosporidium outbreak of 1993 what barriers failed -
CORRECT ANSWER-source protection, filtration
john snow major contribution to public health was - CORRECT ANSWER-logically
identified the source of cholera epidemic
what was the source of water for milwaukee - CORRECT ANSWER-lake michigan
cyptosporidium is - CORRECT ANSWER-a protozaon
frank pathogens typically have very high infectious doses - CORRECT ANSWER-true
, cholera is a notorious example of watery bacteria - CORRECT ANSWER-true
environmental enteropathy is degradation of the nutrient cycling capacity of soils by
human pathogens - CORRECT ANSWER-false
plasmids - CORRECT ANSWER-participate in horizaontal gene exhanges and carry
antibiotic resistance genes between bacterial cells
Cryptosporidum is a rarely found in US surface waters. - CORRECT ANSWER-true
groundwater - CORRECT ANSWER-is responsible for the greatest number of outbreaks
adding organic matter to a sandy soil will frequently improve the retention capacity of
the soil - CORRECT ANSWER-true
a large Log Koc can act to extend the half life of a compund - CORRECT ANSWER-true
why is kow used as an indicators of sorption - CORRECT ANSWER-octanol is a model
for the behavior of nonpolar mlecuels relative to water
the adsorption of highly polar molecules to soil is NOT described very well by Koc and
Kow - CORRECT ANSWER-
henrys constant is a measure of a compunds - CORRECT ANSWER-tendency to
volatilize
Kow can be used to predict Koc and how a neutral (non ionic) compound will partition
into a living organism - CORRECT ANSWER-true
the movement of 2,4,5 tricholophenol is likely to be greater at pHs above its pKa than
below - CORRECT ANSWER-GREATER
Koc is defined as - CORRECT ANSWER-Kd divided by the organic carbon content of a
soil
Organic compounds that partition out of water on to organic matter (or into fat) are likely
to have low log Koc and log Kow values. - CORRECT ANSWER-false
1st order degradation kinetics is dependent on both the concentration of the pollutant
and the concentration of the degrading bacteria in the soil. - CORRECT ANSWER-false
the R term of the solute transport equation would - CORRECT ANSWER-decrease as
volumteric water content increases
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