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27 Dec 2018, 13:07
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
75% (01:43) correct
25%
(01:50)
wrong
based on 1947
sessions
History
Date
Time
Result
Not Attempted Yet
Houses built during the last ten years have been found to contain indoor air pollution at levels that are, on average, much higher than the levels found in older houses. The reason air-pollution levels are higher in the newer houses is that many such houses are built near the sites of old waste dumps or where automobile emissions are heavy.
Which of the following, if true, calls into question the explanation above?
(A) Many new houses are built with air-filtration systems that remove from the house pollutants that are generated indoors.
(B) The easing of standards for smokestack emissions has led to an increase in air-pollution levels in homes.
(C) New houses built in secluded rural areas are relatively free of air pollutants.
(D) Warm-weather conditions tend to slow down the movement of air, thus keeping pollution trapped near its source.
(E) Pressboard, an inexpensive new plywood substitute now often used in the construction of houses, emits the pollutant formaldehyde into the house.
ID 16806
Which of the following, if true, calls into question the explanation above?
(A) Many new houses are built with air-filtration systems that remove from the house pollutants that are generated indoors.
(B) The easing of standards for smokestack emissions has led to an increase in air-pollution levels in homes.
(C) New houses built in secluded rural areas are relatively free of air pollutants.
(D) Warm-weather conditions tend to slow down the movement of air, thus keeping pollution trapped near its source.
(E) Pressboard, an inexpensive new plywood substitute now often used in the construction of houses, emits the pollutant formaldehyde into the house.
ID 16806
27 Dec 2018, 13:30
Kudos
Bookmarks
IMO E
It gives the other reason for the increase of pollution in newer home
Thereby weakening the conclusion
Pressboard, an inexpensive new plywood substitute now often used in the construction of houses, emits the pollutant formaldehyde into the house.
Posted from my mobile device
It gives the other reason for the increase of pollution in newer home
Thereby weakening the conclusion
Pressboard, an inexpensive new plywood substitute now often used in the construction of houses, emits the pollutant formaldehyde into the house.
Posted from my mobile device
27 Dec 2018, 14:07
Kudos
Bookmarks
Bunuel
Conclusion:- Newer Houses contain more indoor air pollution than older houses.
Reason:- Newer houses are built near the site of dumps or where automobile emissions are heavy.
To find:- A statement, if true, refutes the reason for that conclusion. This could be an alternative reason that is responsible for the disparity observed between older and newer homes.
(A) Indoor Pollution is taken care of by the air filtration system, but what about the outdoor pollution? Nothing has been mentioned about the outdoor pollution. Out of Scope.
(B) Easing of standards would impact older and newer homes alike, leaving scope for the aforementioned reason to be plausible. Not refuting the reason. Eliminated.
(C) This actually strengthens the reason mentioned. For newer houses in secluded rural areas are free of air pollution implies that newer houses in busy industrial areas where air pollution is imminent is so because of external factors. Eliminated.
(D) This statement also somewhat strengthens the mentioned reason for if warm weather conditions keep air trapped at the source, then houses near the source would be affected. Eliminated.
(E) This statement presents an alternate reason filling in on the disparity between older and newer homes and thus, is the answer.
IMO, Option E.
