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Shelbyville city

Expert replies
by SmarpanGamt » Sat Oct 16, 2010 12:14 pm
Last year all refuse collected by Shelbyville city services was incinerated. This incineration generated a large quantity of residual ash. In order to reduce the amount of residual ash Shelbyville generates this year to half of last year’s total, the city has revamped its collection program. This year city services will separate for recycling enough refuse to reduce the number of truckloads of refuse to be incinerated to half of last year’s number.

Which of the following is required for the revamped collection program to achieve its aim?

(A) This year, no materials that city services could separate for recycling will be incinerated.
(B) Separating recyclable materials from materials to be incinerated will cost Shelbyville less than half what it
cost last year to dispose of the residual ash.
(C) Refuse collected by city services will contain a larger proportion of recyclable materials this year than it
did last year.
(D) The refuse incinerated this year will generate no more residual ash per truckload incinerated than did the refuse incinerated last year.
(E) The total quantity of refuse collected by Shelbyville city services this year will be no greater than that collected last year


Please explain the OE for your pick. I am confused Betw’n D and E .
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Source: — Critical Reasoning |

by shovan85 » Sat Oct 16, 2010 1:12 pm
IMO A

Which of the Options is required for revamped collection to achieve the aim, So we can look for the option which shows the less quantity of Refuse be incinerated.

A Recyclabel not incinerated, so less Refuse burnt so less Ash generation

What is OA?
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by diebeatsthegmat » Sat Oct 16, 2010 6:09 pm
SmarpanGamt wrote:Last year all refuse collected by Shelbyville city services was incinerated. This incineration generated a large quantity of residual ash. In order to reduce the amount of residual ash Shelbyville generates this year to half of last year’s total, the city has revamped its collection program. This year city services will separate for recycling enough refuse to reduce the number of truckloads of refuse to be incinerated to half of last year’s number.

Which of the following is required for the revamped collection program to achieve its aim?

(A) This year, no materials that city services could separate for recycling will be incinerated.
(B) Separating recyclable materials from materials to be incinerated will cost Shelbyville less than half what it
cost last year to dispose of the residual ash.
(C) Refuse collected by city services will contain a larger proportion of recyclable materials this year than it
did last year.
(D) The refuse incinerated this year will generate no more residual ash per truckload incinerated than did the refuse incinerated last year.
(E) The total quantity of refuse collected by Shelbyville city services this year will be no greater than that collected last year


Please explain the OE for your pick. I am confused Betw’n D and E .
right, i chose D....
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by ronaldramlan » Sat Oct 16, 2010 8:25 pm
OA is D

E is wrong because we want to show that a reduction in the amount of refuse (or number of truckloads) leads to a proportionate reduction in the amount of residual ash, and it doesn't show such correlation.

Even if it's true that the total qty of refuse will remain the same as that of last year, we cannot guarantee that the amount of residual ash will decline. It might be the case that the amount of residual ash is not linearly related to the amount of refuse.
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by shovan85 » Sat Oct 16, 2010 10:57 pm
Please explain what the question is asking and why other options are wrong... Completely confused about this one :(
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by Dangerous Dude » Sun Oct 17, 2010 3:19 am
It's confusing no option is direct....

As per question : revamped collection program has to achieve its aim.
Aim: to reduce the number of truckloads of refuse to be incinerated to half of last year's number

So the required criteria would stenthen the conclusion...

D) is only strengthening the conclusion.. If residual ash per truckload incinerated would generate more ash then the aim would get defeated..... . So it shouldn't generate more ash per truck...


A is stated...not required
B... Out of scope
C.... Out of scope..
E.. Even if it is greater.. we can't say incineraters are going to increase... leading to more ash..
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