When glass products are made from recycled glass, the : GMAT Critical Reasoning (CR)
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# When glass products are made from recycled glass, the

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22 May 2009, 04:34
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When glass products are made from recycled glass, the resulting products can be equal in quality to glass products made from quartz sand, the usual raw material. When plastics are recycled, however, the result is inevitably a plastic of a lower grade than the plastic from which it is derived. Moreover, no applications have been found for grades of plastic that are lower than the currently lowest commercial grade.
Which one of the following is a conclusion that can be properly drawn from the statements above?
(A) Products cannot presently be made out of plastic recycled entirely from the currently lowest commercial grade.
(B) It is impossible to make glass products from recycled glass that are equal in quality to the best glass products made from the usual raw material.
(C) Glass products made from recycled glass are less expensive than comparable products made from quartz sand.
(D) Unless recycled plastic bears some symbol revealing its origin, not even materials scientists can distinguish it from virgin plastic.
(E) The difference in quality between different grades of glass is not as great as that between different grades of plastic.
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22 May 2009, 04:47
E?
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22 May 2009, 04:49
IMO A

The main scope is about plastic, so just focusing on choices mentioning about plastic
- No application found on plastic grades < currently lowest commercial plastic's grade

A probably inference: if recycled plastic of currently lowest commercial grade --> its grades < its original grades = currently lowest commercial grade --> no application = no product found on recycled plastic of currently lowest commercial grade --> answer A

Other choices are irrelavant

When glass products are made from recycled glass, the resulting products can be equal in quality to glass products made from quartz sand, the usual raw material. When plastics are recycled, however, the result is inevitably a plastic of a lower grade than the plastic from which it is derived. Moreover, no applications have been found for grades of plastic that are lower than the currently lowest commercial grade.
Which one of the following is a conclusion that can be properly drawn from the statements above?
(A) Products cannot presently be made out of plastic recycled entirely from the currently lowest commercial grade
(B) It is impossible to make glass products from recycled glass that are equal in quality to the best glass products made from the usual raw material.
(C) Glass products made from recycled glass are less expensive than comparable products made from quartz sand.
(D) Unless recycled plastic bears some symbol revealing its origin, not even materials scientists can distinguish it from virgin plastic.
(E) The difference in quality between different grades of glass is not as great as that between different grades of plastic.[/quote]
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22 May 2009, 04:51
I'll go with E( even though it is a bit far fetched). But, I think, it is best available option

sondenso wrote:
When glass products are made from recycled glass, the resulting products can be equal in quality to glass products made from quartz sand, the usual raw material. When plastics are recycled, however, the result is inevitably a plastic of a lower grade than the plastic from which it is derived. Moreover, no applications have been found for grades of plastic that are lower than the currently lowest commercial grade.
Which one of the following is a conclusion that can be properly drawn from the statements above?
(A) Products cannot presently be made out of plastic recycled entirely from the currently lowest commercial grade. Argument says that products can be made but the applications have not been found
(B) It is impossible to make glass products from recycled glass that are equal in quality to the best glass products made from the usual raw material. Contradicts the first line of the stem
(C) Glass products made from recycled glass are less expensive than comparable products made from quartz sand. No info available
(D) Unless recycled plastic bears some symbol revealing its origin, not even materials scientists can distinguish it from virgin plastic. OOS
(E) The difference in quality between different grades of glass is not as great as that between different grades of plastic. The best because recycling can deliver a glass that is comparable to the one from which it is derived but same is not the case with plastic. Hence, there are bound to be some differences in the quality of the available material

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22 May 2009, 06:25
between A and E . I chose E.

A is out because there is no reference of the point that products cannot be made. Its just that there is no application for lower than currently available grade of plastic.

In E the assumptions are less than those in A.
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22 May 2009, 09:06
I would go with E .
What's the OA?
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23 May 2009, 02:42
Minheequang wrote:
IMO A

The main scope is about plastic, so just focusing on choices mentioning about plastic
- No application found on plastic grades < currently lowest commercial plastic's grade

A probably inference: if recycled plastic of currently lowest commercial grade --> its grades < its original grades = currently lowest commercial grade --> no application = no product found on recycled plastic of currently lowest commercial grade --> answer A

Other choices are irrelavant

When glass products are made from recycled glass, the resulting products can be equal in quality to glass products made from quartz sand, the usual raw material. When plastics are recycled, however, the result is inevitably a plastic of a lower grade than the plastic from which it is derived. Moreover, no applications have been found for grades of plastic that are lower than the currently lowest commercial grade.
Which one of the following is a conclusion that can be properly drawn from the statements above?
(A) Products cannot presently be made out of plastic recycled entirely from the currently lowest commercial grade
(B) It is impossible to make glass products from recycled glass that are equal in quality to the best glass products made from the usual raw material.
(C) Glass products made from recycled glass are less expensive than comparable products made from quartz sand.
(D) Unless recycled plastic bears some symbol revealing its origin, not even materials scientists can distinguish it from virgin plastic.
(E) The difference in quality between different grades of glass is not as great as that between different grades of plastic.
[/quote]

OA is A, thanks
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23 May 2009, 06:44
sondenso wrote:
Minheequang wrote:
IMO A

The main scope is about plastic, so just focusing on choices mentioning about plastic
- No application found on plastic grades < currently lowest commercial plastic's grade

A probably inference: if recycled plastic of currently lowest commercial grade --> its grades < its original grades = currently lowest commercial grade --> no application = no product found on recycled plastic of currently lowest commercial grade --> answer A

Other choices are irrelavant

When glass products are made from recycled glass, the resulting products can be equal in quality to glass products made from quartz sand, the usual raw material. When plastics are recycled, however, the result is inevitably a plastic of a lower grade than the plastic from which it is derived. Moreover, no applications have been found for grades of plastic that are lower than the currently lowest commercial grade.
Which one of the following is a conclusion that can be properly drawn from the statements above?
(A) Products cannot presently be made out of plastic recycled entirely from the currently lowest commercial grade
(B) It is impossible to make glass products from recycled glass that are equal in quality to the best glass products made from the usual raw material.
(C) Glass products made from recycled glass are less expensive than comparable products made from quartz sand.
(D) Unless recycled plastic bears some symbol revealing its origin, not even materials scientists can distinguish it from virgin plastic.
(E) The difference in quality between different grades of glass is not as great as that between different grades of plastic.

OA is A, thanks[/quote]

But why is E incorrect ?
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24 May 2009, 06:43
the argument is abt recycled plastic. hence e canot be infernece.
Re: Recycled products   [#permalink] 24 May 2009, 06:43
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