LSAT 122 – Section 2 – Question 20

LSAT 122 - Section 2 - Question 20

June 2006

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT122 S2 Q20
+LR
Most strongly supported +MSS
A
2%
157
B
85%
165
C
7%
159
D
1%
153
E
4%
154
138
147
156
 +Medium 146.896 +SubsectionMedium

Environmentalist: Discarding old appliances can be dangerous: refrigerators contain chlorofluorocarbons; electronic circuit boards and cathode-ray tubes often contain heavy metals like lead; and old fluorescent bulbs contain mercury, another heavy metal. When landfills are operated properly, such materials pose no threat. However, when landfills are not operated properly, lead and mercury from them contaminate groundwater, for example. On the other hand, when trash is incinerated, heavy metals poison the ash and escape into the air.

Summary

Discarding old appliances can be dangerous because some contain harmful heavy metals. When landfills are operated properly, the heavy metals pose no threat. When landfills are not operated properly, lead and mercury can contaminate groundwater. When trash is burned, heavy metals poison the ash and are released into the air.

Strongly Supported Conclusions

Old appliances that contain heavy metals should not be burned when discarded.

A
Old fluorescent bulbs should be recycled.

This answer is unsupported. We don’t know from the stimulus what “recycling” involves. We only know from the stimulus that old fluorescent bulbs should not be incinerated.

B
Appliances containing heavy metals should not be incinerated.

This answer is strongly supported. Since incineration causes heavy metals to poison the ash, these appliances should not be incinerated.

C
Chlorofluorocarbons are harmful to the atmosphere.

This answer is unsupported. We only know from the stimulus that heavy metals, when incinerated, are harmful to the atmosphere. It’s unclear from the stimulus whether chlorofluorocarbons are heavy metals.

D
Newer appliances are more dangerous to the environment than older ones.

This answer is unsupported. The stimulus is limited to older appliances. We don’t know anything about newer appliances in order to draw this comparison.

E
Appliances should be kept out of landfills.

This answer is unsupported. The stimulus is limited to older appliances. This answer applies to appliances generally and is therefore too strong.

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LSAT PrepTest 122 Explanations

Section 1 - Logical Reasoning

Section 2 - Logical Reasoning

Section 3 - Reading Comprehension

Section 4 - Logical Reasoning

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