The emission of sulfur dioxide when high-sulfur coal is : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 16 Jan 2017, 10:55

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The emission of sulfur dioxide when high-sulfur coal is

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Director
Joined: 08 Jul 2004
Posts: 598
Followers: 2

Kudos [?]: 214 [1] , given: 0

The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

25 Jul 2005, 15:56
1
This post received
KUDOS
6
This post was
BOOKMARKED
00:00

Difficulty:

15% (low)

Question Stats:

77% (02:06) correct 23% (01:08) wrong based on 543 sessions

### HideShow timer Statistics

The emission of sulfur dioxide when high-sulfur coal is burned is restricted by law. New coal-burning plants usually comply with the law by installing expensive equipment to
filter sulfur dioxide from their emissions. These new plants could save money by installing instead less expensive cleaning equipment that chemically removes most sulfur
from coal before combustion.

Which of the following, if known, would be most relevant to evaluating the claim above about how new coal-burning plants could save money?

A. Whether existing oil-burning plants are required to filter sulfur dioxide from their emissions
B. Whether the expense of installing the cleaning equipment in a new plant is less than the expense of installing the cleaning equipment in an older plant
C. Whether the process of cleaning the coal is more expensive than the process of filtering the emissions
D. Whether lawful emissions of sulfur dioxide from coal-burning plants are damaging the environment
E. Whether existing plants that use the filtering equipment could replace this equipment with the cleaning equipment and still compete with new plants that install the cleaning equipment
[Reveal] Spoiler: OA

_________________

Regards, S

Last edited by JarvisR on 06 Jul 2015, 09:14, edited 2 times in total.
OA Added
If you have any questions
you can ask an expert
New!
Director
Joined: 11 Mar 2005
Posts: 725
Followers: 3

Kudos [?]: 62 [4] , given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

25 Jul 2005, 16:09
4
This post received
KUDOS
C it is.

We know about the cost of the equipment, but we dont know about the cost of the process.

It is like a printer, I can buy a cheap printer whose printing cost is more than the expensive printer whose printing cost is cheap.
Director
Joined: 05 Jan 2005
Posts: 560
Followers: 2

Kudos [?]: 22 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

29 Jul 2005, 04:09
(C).

Clean before buring coal is more (or less) expensive than filter after burning coal? If i know which is cheaper (or more expensive), then i can decide if i will save money or not by whichever of the 2 processes i use.
Senior Manager
Joined: 29 Jun 2005
Posts: 403
Followers: 2

Kudos [?]: 21 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

29 Jul 2005, 08:10
C it is,
Retired Moderator
Joined: 18 Jul 2008
Posts: 994
Followers: 10

Kudos [?]: 196 [0], given: 5

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 09:19
Any other opinions on this?
Manager
Joined: 12 Jun 2008
Posts: 82
Followers: 1

Kudos [?]: 2 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 09:35
C as well.
Manager
Joined: 23 Jul 2008
Posts: 203
Followers: 1

Kudos [?]: 118 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 10:56
had a temptation to pick E
But I feel correct one is C
SVP
Joined: 17 Jun 2008
Posts: 1569
Followers: 11

Kudos [?]: 250 [1] , given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 11:08
1
This post received
KUDOS
C. Try to negate C and it will affect the conclusion.
Director
Joined: 12 Oct 2008
Posts: 554
Followers: 3

Kudos [?]: 424 [0], given: 2

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 16:07
C
Manager
Joined: 24 Sep 2008
Posts: 106
Followers: 1

Kudos [?]: 4 [1] , given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

11 Nov 2008, 21:44
1
This post received
KUDOS
(C)
_________________

Kick GMAT ass

Senior Manager
Joined: 19 Nov 2007
Posts: 470
Followers: 4

Kudos [?]: 193 [0], given: 4

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

12 Nov 2008, 21:31
clear C.
Whts the OA?
_________________

-Underline your question. It takes only a few seconds!
-Search before you post.

Moderator
Status: battlecruiser, operational...
Joined: 25 Apr 2010
Posts: 983
Schools: Carey '16
GMAT 1: Q V
Followers: 12

Kudos [?]: 159 [1] , given: 71

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

20 Nov 2010, 09:12
1
This post received
KUDOS
OA indeed C
_________________
Senior Manager
Joined: 15 Feb 2011
Posts: 263
Followers: 4

Kudos [?]: 151 [0], given: 9

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

29 Aug 2011, 03:20
I chose C but the OA i have is E....
Intern
Joined: 31 May 2010
Posts: 38
Schools: ESADE, IE
Followers: 0

Kudos [?]: 2 [0], given: 2

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

01 Sep 2011, 17:04
Yes, C.

Thought E looks tempting.
VP
Status: Been a long time guys...
Joined: 03 Feb 2011
Posts: 1420
Location: United States (NY)
Concentration: Finance, Marketing
GPA: 3.75
Followers: 175

Kudos [?]: 1333 [0], given: 62

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

09 Oct 2011, 01:28
clearly C...
_________________
Senior Manager
Joined: 25 Nov 2011
Posts: 261
Location: India
Concentration: Technology, General Management
GPA: 3.95
WE: Information Technology (Computer Software)
Followers: 4

Kudos [?]: 165 [0], given: 20

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

16 Jan 2012, 06:54
DeeptiM wrote:
I chose C but the OA i have is E....

It can not be E but C only.

Argument does not talk about the competition between old and new plants.
Even if we were to bring in that line, why would new plants care about what is being used by old plants as long as the new plants can be benefited by something?
_________________

-------------------------
-Aravind Chembeti

Senior Manager
Joined: 13 Aug 2010
Posts: 314
Followers: 1

Kudos [?]: 21 [0], given: 1

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

16 Jan 2012, 07:34
+1 for C
Intern
Joined: 14 Jul 2013
Posts: 5
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

20 Jul 2013, 02:33
hi,

why can not we have option B as our answer? please explain in detail.

Thanks
Verbal Forum Moderator
Joined: 15 Jun 2012
Posts: 1153
Location: United States
Followers: 258

Kudos [?]: 2859 [5] , given: 123

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

20 Jul 2013, 14:31
5
This post received
KUDOS
asquare04120 wrote:
hi,

why can not we have option B as our answer? please explain in detail.

Thanks

Hi asquare04120

Welcome to GMAT club!

I'm glad to help you this question.

GENERAL METHOD

This is “evaluate the argument”, one of the most difficult type of CR questions. To attack this question:
- First, determine the conclusion is KEY. If you do not know what the argument wants to conclude. How can you evaluate its argument?
- Next, you can use general methods to eliminate wrong answers (out of scope, reverse answer, …)
- When you narrow to TWO options and don’t know which one is correct, you can apply “variance method”.

How to use this strategy? The answer choices always have the question “whether X can help Y……?”, for instance. Just plug in “yes”, or “no” to the question. For example: X can help Y…., and X cannot help Y….. If the two answers (Yes & No) make the author changes his/her conclusion. This option choice is correct.

ANALYZE THE STIMULUS:

Fact: New coal-burning plants usually comply with the law by installing expensive equipment to
filter sulfur dioxide from their emissions.
Fact: installing cleaning equipment that chemically removes most sulfur from coal before combustion is less expensive.
Conclusion: These new plants could save money by installing cleaning equipment.

Pre-thinking: Are there any cost other than “equipment cost”? For example: administration cost, labor cost, maintenance cost, etc… We should calculate TOTAL COST to make a final conclusion.

ANALYZE EACH ANSWER

A. Whether existing oil-burning plants are required to filter sulfur dioxide from their emissions
Wrong. Nothing about “costs”. Out immediately.

B. Whether the expense of installing the cleaning equipment in a new plant is less than the expense of installing the cleaning equipment in an older plant
Wrong. We are comparing expense of “cleaning equipment” vs “filtering equipment”. B only compares expense of installing “cleaning equipment” in new plan and old plan. It does not help you to compare expense between two options “cleaning equipment” vs “filtering equipment”. Hence, B is wrong.

C. Whether the process of cleaning the coal is more expensive than the process of filtering the emissions
Correct.
If “YES”. the process of cleaning the coal is more expensive than the process of filtering the emissions ==> the new plants could not save money by installing cleaning equipment.
If “NO”. the process of cleaning the coal is NOT more expensive than the process of filtering the emissions ==> the new plants could save money by installing cleaning equipment.
Thus, C definitely can help to “evaluate” the conclusion. Hence, C is correct.

D. Whether lawful emissions of sulfur dioxide from coal-burning plants are damaging the environment
Wrong. Nothing about “costs”. Out immediately.

E. Whether existing plants that use the filtering equipment could replace this equipment with the cleaning equipment and still compete with new plants that install the cleaning equipment
Wrong. TEMPTING but wrong.
If “Yes”. Existing plants that use the filtering equipment COULD replace this equipment with the cleaning equipment .......... Okay, existing plants can replace their equipment with cleaning equipment. How can we compare between “cleaning equipment” and “filter equipment”, which one is cheaper?
If “No”. Existing plants that use the filtering equipment COULD NOT replace this equipment with the cleaning equipment….. Okay, existing plants cannot replace their equipment with cleaning equipment, they still use filtering equipment. How can we compare between “cleaning equipment” and “filter equipment”, which one is cheaper?
Clearly, E just says the existing plants can or cannot replace the filtering equipment with cleaning equipment. That's it. E does not help anything to “evaluate” which one could help to save money. Hence, E is wrong

Hope it helps.
_________________

Please +1 KUDO if my post helps. Thank you.

"Designing cars consumes you; it has a hold on your spirit which is incredibly powerful. It's not something you can do part time, you have do it with all your heart and soul or you're going to get it wrong."

Chris Bangle - Former BMW Chief of Design.

GMAT Club Legend
Joined: 01 Oct 2013
Posts: 10526
Followers: 917

Kudos [?]: 203 [0], given: 0

Re: The emission of sulfur dioxide when high-sulfur coal is [#permalink]

### Show Tags

20 Sep 2014, 01:15
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: The emission of sulfur dioxide when high-sulfur coal is   [#permalink] 20 Sep 2014, 01:15

Go to page    1   2    Next  [ 23 posts ]

Similar topics Replies Last post
Similar
Topics:
1 Significant pollutant amongst automobile emissions is Nitrogen dioxide 8 18 Feb 2016, 20:50
9 Acid rain, caused by high levels of sulfur dioxide and mercu 8 20 May 2014, 04:55
1 Chema Options to Reduce Emissions 5 02 Jul 2013, 10:34
CR - Surphur dioxide emission 3 01 May 2009, 07:34
25 Urban air contains more sulfur dioxide than does rural air, 32 13 May 2008, 06:13
Display posts from previous: Sort by

# The emission of sulfur dioxide when high-sulfur coal is

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.