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Refuse Incineration CR

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Refuse Incineration CR

by aj5105 » Sat Jun 27, 2009 9:39 am
Last year all refuse collected by Shelbyville city services was incinerated. This incineration generated a large quantity of residue ash. In order to reduce the amount of residue 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 residue 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 residue 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.
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by sasen » Sat Jun 27, 2009 9:52 am
E seems like a good option.lets see what others sai
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by raghavsarathy » Sat Jun 27, 2009 9:57 am
IMO - D

A - The option does not speak about non-recyclable materials. It is these materials which will result in residue ash

B - Cost is definetly not a factor here.

C - We are not told abt recyclable materials being seperated the previous year. Hence not valid.

D - If the amount of ash produced by each truckload increases when compared to the previous year then the effect of reduction in the number of truckloads will be offset. Option D states precisely the opposite. Hence D is the right answer.

E - Does not speak about the segregation into recyclable or non-recyclable materials
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by sasen » Sat Jun 27, 2009 10:31 am
D talks about the final outcome of the collection process which is definatel what it is desired.but one can still reduce the total ash bi half if the collection process ensures that thei incinerate onli half the trash.does the rate of ash conversion realli matter?
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by yogami » Sat Jun 27, 2009 10:43 am
E IMO
E is required as the first step to begin with. If its more refuse this year then the task becomes all the more difficult!!
200 or 800. It don't matter no more.
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by Morgoth » Sat Jun 27, 2009 10:59 am
IMO D

The stimulus already tells us that

amount of residue ash generated is directly proportional to number of truckloads of refuse to be incinerated.

If you look at it again, you'll see the plan is already successful, provided we are able to prove 1 important assumption i.e. less amount of refuse do not create large amount of residue.

Option D tells us exactly that.


OA? Whats the source?
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by pranav » Sat Jun 27, 2009 11:31 am
D is the correct answer.

The question stem already states that by recycling, the number of truckloads of refuse to be incinerated will be reduced to half of last year's number.

Hence as stated in (D), if each truckload produces same or less amount of residue ash per truckload, the total residue ash will be same or less than last year's number.
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by sasen » Sat Jun 27, 2009 12:31 pm
D should be the answer,i mistook the for with of in
Which of the following is required for the revamped collection
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by mehravikas » Sat Jun 27, 2009 8:28 pm
IMO - D
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by ranell » Sun Jun 28, 2009 3:20 pm
A. This year, no materials that city services could separate for recycling will be incinerated. – TOO EXTREME FOR THE GMAT

B. Separating recyclable materials from materials to be incinerated will cost Shelbyville less than half what it cost last year to dispose of the residue ash – it doesn’t matter how much this separating will cost

C. Refuse collected by city services will contain a larger proportion of recyclable materials this year than it did last year – it doesn’t matter what proportion of recyclable materials we have this year

D. The refuse incinerated this year will generate no more residue ash per truckload incinerated than did the refuse incinerated last year. - CORRECT as if refuse incinerated this year (after its separation from refuse for recycling) generates more residue ash per truckload and number of truckloads probably did not change, this destroys the purpose of the plan - to reduce the amount of residue ash Shelbyville generates this year. If you negate this assumption for revamped collection program, the program will fail.

E. The total quantity of refuse collected by Shelbyville city services this year will be no greater than that collected last year – it doesn’t matter how much refuse we collected this year or last year, we speak about recycling refuse in the argument
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by micheal_kr » Sun May 15, 2016 10:58 pm
I still feel D should be the answer.
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