Environmental Health

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

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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