Environmental Health: Local To Global: Module 4 Quiz

Question 1

1. A combined sewer overflow is designed to handle __________.

[removed]	both the water flushed down toilets and other household wastewater
[removed]	the overflow of pretreated industrial wastes
[removed]	peaks in wastewater flow caused by surface runoff

1 points  

Question 2

1. A septic system consists of a septic tank and a __________.

[removed]	leach field
[removed]	sludge digester
[removed]	trickling filter

1 points  

Question 3

1. Secondary sewage treatment is fundamentally a _______________ process.

[removed]	biological
[removed]	chemical
[removed]	mechanical
[removed]

1 points  

Question 4

1. About __________ of treated sewage sludge in the United States is disposed of by spreading it on land.

[removed]	25 percent
[removed]	50 percent
[removed]	75 percent

1 points  

Question 5

1. Potable water is water that is __________.

[removed]	available for human use within a given watershed
[removed]	considered suitable for use as drinking water
[removed]	derived from a sustainable source

1 points  

Question 6

1. Primary sewage treatment is fundamentally a _______________ process.

[removed]	biological
[removed]	chemical
[removed]	mechanical

1 points  

Question 7

1. Metals present in municipal wastewater may still be present in treated sewage sludge; __________.

[removed]	dioxins may also be present in treated sludge, but pathogens will not be present
[removed]	pathogens may also be present in treated sludge, but dioxins will not be present
[removed]	both pathogens and dioxins may also be present in treated sludge

1 points  

Question 8

1. Currently, most human exposure to polychlorinated biphenyls (PCBs) in the environment is through _______________.

[removed]	ingestion of food
[removed]	inhalation of indoor air
[removed]	intravenous drips

1 points  

Question 9

1. The most significant difference between untreated and treated sewage sludge is that most of the __________ have been removed from the treated sludge.

[removed]	metals
[removed]	organic chemicals
[removed]	pathogens

1 points  

Question 10

1. The term biosolids is sometimes used to refer to __________.

[removed]	manure collected from CAFOs
[removed]	scum (floating material) inside a septic tank
[removed]	treated municipal sewage sludge

1 points  

Question 11

1. The bar screen, grinder, and grit chamber are used in __________.

[removed]	municipal drinking water treatment
[removed]	municipal solid waste disposal
[removed]	primary sewage treatment

1 points  

Question 12

1. Some likely human health impacts of polybrominated diphenyl ethers (PBDEs) are suggested by their chemical structure, which is similar to that of _______________.

[removed]	human growth hormone
[removed]	neurotransmitters
[removed]	thyroid hormones

1 points  

Question 13

1. Exposure to byproducts of disinfecting drinking water with chlorine has been associated with increased risk of __________.

[removed]	bladder cancer
[removed]	leukemia
[removed]	oral cancer

1 points  

Question 14

1. 21. Chlorination of drinking water is highly effective at killing __________.

[removed]	bacteria
[removed]	protozoa
[removed]	viruses
[removed]	all of the above

1 points  

Question 15

1. Which of the following are steps in primary sewage treatment?

[removed]	Bar screen, grinder, grit chamber, primary clarifier
[removed]	Settling, coagulation and flocculation, sedimentation, filtration
[removed]	Thickening and stabilization

Question 1

1. Trihalomethanes are __________.

[removed]	byproducts of drinking water disinfection
[removed]	common as indoor air contaminants from consumer products
[removed]	primarily a problem of medical wastes

Question 3

1. Secondary sewage treatment is fundamentally a _______________ process.

[removed]	biological
[removed]	chemical
[removed]	mechanical

Question 9

1. Historically, the use of chlorine bleach has made the pulp and paper industry an important source of __________ contamination.

[removed]	chromium
[removed]	dioxin
[removed]	polychlorinated biphenyls (PCBs)

Question 10

1. Which of the following are steps in municipal drinking water treatment?

[removed]	Bar screen, grinder, grit chamber, sedimentation tank
[removed]	Settling, coagulation and flocculation, sedimentation, filtration
[removed]	Thickening, stabilization, fluoridation

Question 12

1. Which of the following chemicals are widely used as flame retardants in consumer products?

[removed]
[removed]	Polybrominated diphenyl ethers (PBDEs)
[removed]	Polychlorinated biphenyls (PCBs)

Question 15

1. Industrial wastes, if not pretreated before entering a municipal wastewater treatment system, may __________.

[removed]	cause damage to the municipal works
[removed]	kill bacteria used in wastewater treatment
[removed]	both a and b

 

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