GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Jan 2019, 17:13

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winners of the GMAT game show

     January 22, 2019

     January 22, 2019

     10:00 PM PST

     11:00 PM PST

    In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.
  • Key Strategies to Master GMAT SC

     January 26, 2019

     January 26, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

Several industries have recently switched at least partly from older t

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

Hide Tags

 
Manager
Manager
avatar
Status: Single
Joined: 05 Jun 2011
Posts: 98
Location: Shanghai China
Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 27 Jul 2011, 06:55
12
29
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

81% (01:22) correct 19% (01:33) wrong based on 3103 sessions

HideShow timer Statistics

GMAT® Official Guide 2015

Practice Question
Question No.: CR 67
Page: 520

Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technology powered by electricity. It is thus evident that less fossil fuel is being used as a result of the operations of these industries than would have been used if these industries had retained their older technologies.

Which of the following, if true, most strengthen the argument above?

(A) Many of the industries that have switched to at least partly to new technologies have increased their output.

(B) Less fossil fuel was used to manufacture the machinery employed in the new technologies than was originally used to manufacture the machinery employed in the older technologies.

(C) More electricity is used to by those industries that have switched at least partly to the new technologies than by those industries that have not switched.

(D) Some of the industries that have switched at least partly to the new technologies still use primarily technologies that are powered by fossil fuel.

(E) The amount of fossil fuel used to generate the electricity needed to power the new technologies is less than amount that would have been used to power the older technologies.

Fossil Fuel Switch

Step 1: Identify the Question

The phrasing most strengthens the argument in the question stem indicates that this is a Strengthen the Argument question.

Step 2: Deconstruct the Argument

Several industries: fossil fuel tech → electric tech

© less fossil fuel used as a result of operations than w/ older tech

Step 3: Pause and State the Goal

On Strengthen questions, the right answer is an additional fact that, when added to the argument, will make the conclusion more likely to be true. In this case, the correct answer will suggest that less fossil fuel will be used as a result of the operations of these industries, compared to the situation in which the industries kept using fossil fuel to power their technologies.

Step 4: Work from Wrong to Right

(A) For any given technology, an increase in output is likely to increase the amount of fossil fuel used if the technology uses any fossil fuel (new electric technologies might still use fossil fuel if fossil fuel is used to produce electricity). If anything, this answer slightly weakens the argument.

(B) The conclusion specifically compares the amount of fossil fuel used now, compared to the amount that would currently be used if the switch hadn’t happened. The amount of fossil fuel used prior to the switch (including fuel used to produce the technology) is not relevant to this comparison.

(C) The conclusion only mentions the specific industries that have made the switch. The goal is to compare fossil fuel usage in these industries to themselves if they had not made the switch. Comparing these industries to other industries that did not switch does not provide any data about fossil fuel usage, since the fossil fuel usage of the non-switching industries is not known.

(D) If anything, this weakens the conclusion. If the switch resulted in a relatively small reduction in fossil fuel use, and if many industries still use more fossil fuels than other fuels, then it’s less likely that there was an overall decrease (since any other factor, such as an increase in total production, could make up for the small decease.)

(E) CORRECT. The original argument assumes that there is no hidden drawback to the switch. Such a drawback might cause the amount of fossil fuel used to stay the same or even increase. One possible drawback is that powering technologies with electricity could, indirectly, use even more fossil fuel than powering technologies with the fossil fuel directly. This answer choice strengthens the argument by suggesting that this drawback is not a concern. The industries are using less fossil fuel directly and are still using less taking into account the fossil fuel used to produce the electricity.
Most Helpful Community Reply
Manager
Manager
avatar
Joined: 28 Sep 2011
Posts: 55
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Oct 2011, 00:16
11
2
nonameee wrote:

(2) Some industries have switched, at least partly, to powering their machines by electricity



The new technology uses electricity to power the machines. But where does the electricity come from? It can be from either of the two :

( 1 ) Renewable resources like wind, solar etc.

( 2 ) Non-renewable resources a.k.a fossil fuels.

Now, if the electricity were to be derived from a fossil fuel ( like coal ), the actual fossil fuel burned for the process of generating electricity that is required to power the new machines must be lesser than the (fossil fuel ) energy required to power the older machines.

Thus assuming OA to be true, strengthens the argument.

PS: Excuse me for veering into technical stuff! :?
General Discussion
Senior Manager
Senior Manager
User avatar
Joined: 28 Jun 2009
Posts: 375
Location: United States (MA)
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 27 Jul 2011, 11:10
Find the missing link first.

Given argument simply says that because these industries have switched from fossil fuel to electricity, the consumption of fossil fuel is reduced.

The missing link : The argument considers that industries are the ONLY places where fossil fule is used.

Now we have to choose an option which takes care of this missing link and also helps strengthening the argument.

Hence E is the best choice.

B is incorrect because
- B doesn't strengthen the argument
- B has Out of scope information
Director
Director
avatar
Joined: 23 Apr 2010
Posts: 547
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 06 Oct 2011, 04:18
I have some reservations regarding the OA:

The stimulus says that older technologies were powered by fossil fuel; whereas new technologies are powered by electricity. Now, the OA says that fossil fuel is needed to generate power for the new technologies. This is a direct contradiction with the stimulus.

Please explain.

Thanks.
Manager
Manager
avatar
Joined: 28 Sep 2011
Posts: 55
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 08 Oct 2011, 21:26
1
^ As per the premise and OA, fossil fuel is used to generate electricity which in turn power the new technologies. Fossil fuel does not directly power the new machines, but does so indirectly.

The idea that you'll need to reconcile with is, generating electricity from fossil fuel has a better efficiency than directly burning fossil fuel to run the older machines. Kind of like how an electric train is more fuel efficient than an old steam engine. This will be true even if the power plant of the electric train is thermal!
Director
Director
avatar
Joined: 23 Apr 2010
Posts: 547
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 08 Oct 2011, 23:31
1
Quote:
The idea that you'll need to reconcile with is, generating electricity from fossil fuel has a better efficiency than directly burning fossil fuel to run the older machines. Kind of like how an electric train is more fuel efficient than an old steam engine. This will be true even if the power plant of the electric train is thermal!


DexDee, what you are saying is that using electricity is more efficient than burning fossil fuel. But I don't think that this is what they are saying. What they are saying is simply that:

(1) They used to have machinery powered by fossil fuel
(2) Some industries have switched, at least partly, to powering their machines by electricity

and as a result:

(3) Less fossil fuel is being used

Where do they talk about efficiency?

Please explain.

Thanks a lot.
Director
Director
avatar
Joined: 23 Apr 2010
Posts: 547
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Oct 2011, 00:22
Quote:
Now, if the electricity were to be derived from a fossil fuel ( like coal ), the actual fossil fuel burned for the process of generating electricity that is required to power the new machines must be lesser than the (fossil fuel ) energy required to power the older machines.


Yes, thanks a lot. That's the point I missed.
Senior Manager
Senior Manager
avatar
Joined: 28 Jul 2011
Posts: 345
Location: United States
Concentration: International Business, General Management
GPA: 3.86
WE: Accounting (Commercial Banking)
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Oct 2011, 18:27
1
+1 E the Best
_________________

+1 Kudos If found helpful..

Manager
Manager
avatar
Joined: 12 Oct 2011
Posts: 183
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 28 Dec 2011, 01:20
2
The question has been tagged as a question from the OG.

I am sure everyone already knows this but just want to restate the fact:

OFFICIAL GUIDE ANSWERS ARE NEVER WRONG !!!

Understanding the logic behind the OA is the only possible way to improve. Challenging the OA from GMAC is PURE WASTE OF TIME !!!

The answer to this question is indeed E. The logic behind it has already been explained above.
Intern
Intern
avatar
Joined: 23 Jun 2013
Posts: 36
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 28 Aug 2013, 00:53
why cant C be the answer.
E is asking us to think out of scope as from where is electricity being produced.
Senior Manager
Senior Manager
User avatar
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 430
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 08 Sep 2013, 12:57
2
Let me try to help those, who might need some sort of support in understanding why B is wrong whereas E is the OA.
B. B talks about those machineries , which will be used to employ the new technology, would need less FF to get manufactured. Are we talking about the machine and machineries that we may need in our actual operation that is being discussed? No. B talks about some something that we don't know Can't say.
E. FF--> EP << FF itself. This is what was asked to strengthen if we look into the conclusion.
In case you need further help , feel free to share your line of thought
Intern
Intern
avatar
Joined: 23 Jun 2013
Posts: 36
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Sep 2013, 00:44
Two questions:-
1. What is EP
2. Why C cant be the answer
Senior Manager
Senior Manager
User avatar
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 430
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Sep 2013, 00:52
Hey Nilabh,

Ep is eletric powered.
C says,
More electricity is used to by those industries that have switched at least partly to the new technologies than by those industries that have not switched.
here the author says Electric consumption has risen, but here there is no hints given for the FF. Does only EP matters to us?
Hope that helps.
Intern
Intern
avatar
Joined: 23 Jun 2013
Posts: 36
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Sep 2013, 15:04
Thnaks for your reponse.
the first line says:-
Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technology powered by electricity

Now if they have switched to electricity then their Electricity consumption will rise right?
Senior Manager
Senior Manager
User avatar
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 430
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Sep 2013, 20:23
out of 100 , how much shud be several?
10?
20?30?32? we don;t know it that way. that's the trap in several
Intern
Intern
avatar
Joined: 04 Feb 2014
Posts: 12
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 08 Feb 2014, 11:23
1
this answer would have made sense if they stated fossil fuels generated electricity
Senior Manager
Senior Manager
avatar
B
Joined: 03 May 2013
Posts: 279
Location: India
Concentration: Operations, Human Resources
Schools: XLRI GM"18
GPA: 4
WE: Human Resources (Human Resources)
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 09 Feb 2014, 00:51
PREMISE 1. Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technology powered by electricity.
CONCLUSION Less fossil fuel is being used as a result of the operations of these industries than would have been used if these industries had retained their older technologies.

ASSSUMPTION- ELECTRICITY NEEDS LESS FOSSIL FUEL FOR ITS GENERATION THAN WOULD DIRECT USE OF FOSSIL FUEL ENTAIL IN COMPLETION OF GIVEN USE........

Which of the following, if true, most strengthen the argument above?

E) The amount of fossil fuel used to generate the electricty needed to power the new technologies is less than amount that would have been uesed to power the older technologies.CORRECT....
Director
Director
avatar
S
Joined: 08 Jun 2010
Posts: 829
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 04 May 2015, 03:23
there are two points in cr section
we need to read very well. reading skill is taught in basic english course, not in gmat verbal.

second point. ability to criticize is key to cr section. this ability is for all kind of question, assmption, weaken, strengthen, evaluate, flaw and paradox questions with the exception of inference question. this ability can be acquired in a few weeks.

but reading ability is harder to require. we have to get this ability when we study english basic. so, retake the english course which reach reading is a good choice.
Retired Moderator
User avatar
S
Joined: 18 Sep 2014
Posts: 1112
Location: India
GMAT ToolKit User Premium Member Reviews Badge
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 01 Aug 2015, 11:10
1
I got struck between B and E.

I chose B thinking getting into the trap that it specifies less fossil is needed now thereby strngthening the conclusion.
But B speaks about fossil fuel used in production of machinery needed for the industry and not on fossil fuel required/used in operation of industry/machinery.

Hope this helps someone.
Manager
Manager
avatar
B
Joined: 26 Dec 2012
Posts: 146
Location: United States
Concentration: Technology, Social Entrepreneurship
WE: Information Technology (Computer Software)
CAT Tests
Re: Several industries have recently switched at least partly from older t  [#permalink]

Show Tags

New post 17 Dec 2015, 14:58
Could anybody say why answer choice A is incorrect?
Thanks in advance
GMAT Club Bot
Re: Several industries have recently switched at least partly from older t &nbs [#permalink] 17 Dec 2015, 14:58

Go to page    1   2    Next  [ 32 posts ] 

Display posts from previous: Sort by

Several industries have recently switched at least partly from older t

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.