Question 1

Once water has been contaminated with sewage,it is impossible to restore it to drinking-water quality.

Accepted Answer

A) True 
 B)False

Question 2

One concern with respect to expanding "Superfund" through a tax on disposers of toxic wastes is that such a practice might encourage more illicit waste dumping.

Accepted Answer

A) True 
 B)False

Question 3

The basic assumption behind the dilute-and-disperse philosophy of liquid-waste disposal is that even potentially harmful substances pose no threat if sufficiently diluted.

Accepted Answer

A) True 
 B)False

Question 4

After aerobic waste decomposition in a landfill has stopped,

Accepted Answer

A)   No further breakdown of wastes occurs.
B)   Further leachate is harmless.
C)   Anaerobic decomposition produces different gases, including methane.
D)   Methane production also ceases in the absence of oxygen.E) B) and D)
F) B) and C)

Question 5

If a septic system is to be used for sewage disposal,

Accepted Answer

A)   The surrounding soil must be impermeable to contain the wastes.
B)   High population density is required for efficient operation.
C)   In normal operation, all potential pollutants will be decomposed.
D)   The soil should be unsaturated, containing sufficient air (oxygen)  to permit aerobic breakdown of wastes.E) B) and D)
F) A) and B)

Question 6

Chlorination of some drinking water,if carelessly done,can lead to production of small quantities of toxic chlorinated hydrocarbons.

Accepted Answer

A) True 
 B)False

Question 7

Trash compaction reduces the volume of wastes in a landfill,but also reduces the rate of decomposition of organic matter.

Accepted Answer

A) True 
 B)False

Question 8

On-site disposal of food waste using an in-sink garbage-disposal unit is detrimental for all of the following reasons except

Accepted Answer

A)   It reduces the impact on local landfills.
B)   It requires electricity and water.
C)   It adversely affects the performance of septic systems.
D)   It increases the volume of solids that must be treated by municipal wastewater treatment plants.E) A) and B)
F) A) and C)

Question 9

Steel is in such demand that it is all readily recycled.

Accepted Answer

A) True 
 B)False

Question 10

In developing countries,most sewage is

Accepted Answer

A)   Discharged, untreated, into surface waters.
B)   Handled via communal septic tanks.
C)   Subjected to primary (physical)  but not chemical treatment.
D)   Subjected to both primary and secondary sewage treatment.E) C) and D)
F) A) and B)

Question 11

Recycled plastic is mixed with sawdust to make a product known as composite lumber.

Accepted Answer

A) True 
 B)False

Question 12

The difficulties in recycling where materials are recovered from the municipal refuse requires

Accepted Answer

A)   Source separation.
B)   Source assessment.
C)   Source provenance.
D)   Source assimilation.E) A) and B)
F) A) and C)

Question 13

Which of the following statements is not true?

Accepted Answer

A)   Some radioisotopes are also chemical toxins.
B)   Except for those living near nuclear plants or uranium mines we are not normally exposed to radiation.
C)   Inferences about the effects of low doses of radiation are drawn, in part, by extrapolation from incidents of high dosage.
D)   A given radioisotope behaves chemically just like non-radioactive isotopes of the same element.E) A) and B)
F) A) and C)

Question 14

Organic matter can be beneficial by a process known as

Accepted Answer

A)   Incinerating.
B)   Fertilizing.
C)   Composting.
D)   Harvesting.E) B) and C)
F) C) and D)

Question 15

For the average U.S.resident,the single largest source of radiation exposure is

Accepted Answer

A)   Medical X rays.
B)   Operation of nuclear reactors.
C)   Radioactive fallout from the atmosphere.
D)   Exposure to radon gas.E) None of the above
F) B) and C)

Question 16

A sanitary landfill is so named because wastes are treated each day to decontaminate them.

Accepted Answer

A) True 
 B)False

Question 17

The classification of radioactive wastes as high-level or low-level is very accurate.

Accepted Answer

A) True 
 B)False

Question 18

From the point of view of radiation hazard,the radioisotopes of greatest concern are

Accepted Answer

A)   Those of very short half-life (minutes to days) .
B)   Those of intermediate half-life (years to centuries) .
C)   Those of very long half-life (millions or billions of years) .
D)   Inert gases because they escape into the atmosphere.E) None of the above
F) B) and C)

Exam 16: Waste Disposal

Organic matter can be beneficial by a process known as

Correct Answer
verified

After aerobic waste decomposition in a landfill has stopped,

Correct Answer
verified

Chlorination of some drinking water,if carelessly done,can lead to production of small quantities of toxic chlorinated hydrocarbons.

Correct Answer
verified

Steel is in such demand that it is all readily recycled.

Correct Answer
verified

Once water has been contaminated with sewage,it is impossible to restore it to drinking-water quality.

Correct Answer
verified

From the point of view of radiation hazard,the radioisotopes of greatest concern are

Correct Answer
verified

The classification of radioactive wastes as high-level or low-level is very accurate.

Correct Answer
verified

On-site disposal of food waste using an in-sink garbage-disposal unit is detrimental for all of the following reasons except

Correct Answer
verified

In developing countries,most sewage is

Correct Answer
verified

One concern with respect to expanding "Superfund" through a tax on disposers of toxic wastes is that such a practice might encourage more illicit waste dumping.

Correct Answer
verified

The difficulties in recycling where materials are recovered from the municipal refuse requires

Correct Answer
verified

For the average U.S.resident,the single largest source of radiation exposure is

Correct Answer
verified

If a septic system is to be used for sewage disposal,

Correct Answer
verified

Trash compaction reduces the volume of wastes in a landfill,but also reduces the rate of decomposition of organic matter.

Correct Answer
verified

Recycled plastic is mixed with sawdust to make a product known as composite lumber.

Correct Answer
verified

A sanitary landfill is so named because wastes are treated each day to decontaminate them.

Correct Answer
verified

The basic assumption behind the dilute-and-disperse philosophy of liquid-waste disposal is that even potentially harmful substances pose no threat if sufficiently diluted.

Correct Answer
verified

Which of the following statements is not true?

Correct Answer
verified

Exam 16: Waste Disposal

Organic matter can be beneficial by a process known as

Correct AnswerverifiedShow Answer

After aerobic waste decomposition in a landfill has stopped,

Correct AnswerverifiedShow Answer

Chlorination of some drinking water,if carelessly done,can lead to production of small quantities of toxic chlorinated hydrocarbons.

Correct AnswerverifiedShow Answer

Steel is in such demand that it is all readily recycled.

Correct AnswerverifiedShow Answer

Once water has been contaminated with sewage,it is impossible to restore it to drinking-water quality.

Correct AnswerverifiedShow Answer

From the point of view of radiation hazard,the radioisotopes of greatest concern are

Correct AnswerverifiedShow Answer

The classification of radioactive wastes as high-level or low-level is very accurate.

Correct AnswerverifiedShow Answer

On-site disposal of food waste using an in-sink garbage-disposal unit is detrimental for all of the following reasons except

Correct AnswerverifiedShow Answer

In developing countries,most sewage is

Correct AnswerverifiedShow Answer

One concern with respect to expanding "Superfund" through a tax on disposers of toxic wastes is that such a practice might encourage more illicit waste dumping.

Correct AnswerverifiedShow Answer

The difficulties in recycling where materials are recovered from the municipal refuse requires

Correct AnswerverifiedShow Answer

For the average U.S.resident,the single largest source of radiation exposure is

Correct AnswerverifiedShow Answer

If a septic system is to be used for sewage disposal,

Correct AnswerverifiedShow Answer

Trash compaction reduces the volume of wastes in a landfill,but also reduces the rate of decomposition of organic matter.

Correct AnswerverifiedShow Answer

Recycled plastic is mixed with sawdust to make a product known as composite lumber.

Correct AnswerverifiedShow Answer

A sanitary landfill is so named because wastes are treated each day to decontaminate them.

Correct AnswerverifiedShow Answer

The basic assumption behind the dilute-and-disperse philosophy of liquid-waste disposal is that even potentially harmful substances pose no threat if sufficiently diluted.

Correct AnswerverifiedShow Answer

Which of the following statements is not true?

Correct AnswerverifiedShow Answer

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