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gmat test code 31

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by nikhilkatira » Fri Jun 25, 2010 2:56 am
Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by under inflation.

(A) Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by under inflation.

(B) Because the under inflation of tires can waste up to five percent of a car's fuel by increasing car-road friction, car owners can substantially boost their vehicles' fuel efficiency by properly inflating the tires.

(C) Their vehicles' fuel efficiency is substantially boosted by car owners through the proper inflation of tires that, when under inflated, can waste up to five percent of car fuel by an increase in car-road friction.

(D) The proper inflation of tires by car owners, due to the fact that under inflation can waste up to five percent of a car's fuel by the increase of car-road friction, can substantially boost their fuel efficiency.

(E) Because up to five percent of a car's fuel are wasted through the increases in car-road friction when the tires are under inflated, car owners properly inflating tires can substantially boost their fuel efficiency
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by martin.jonson007 » Fri Jun 25, 2010 3:08 am
B is correct...!

good ques again Nikhil...!

keep it up....

wud like to knw comments on A
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by hardik.jadeja » Fri Jun 25, 2010 3:10 am
Nikhil, Pick B.

The fight is only between A and B.

In A, "car-road friction can waste up to five percent of car fuel by underinflation" creates an awkward meaning. It means that car-road friction is wasting the fuel through under inflation.

C, D & E are badly constructed sentences and "their" in each of the three sentences has no proper reference.

Hope that helps..
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by jube » Fri Jun 25, 2010 3:15 am
IMO B
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by nikhilkatira » Fri Jun 25, 2010 3:29 am
OA is B.

I eliminated A on the basis of usage of 'since' .

In E 'car owners properly inflating tires' is incorrect.


Is my reasoning rite ??
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by akhpad » Fri Jun 25, 2010 4:15 am
E is incorrect because of "their fuel efficiency."

THEIR refers to owners.

It should be "their vehicles' fuel efficiency" as it is in B.
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by Shawshank » Fri Jun 25, 2010 4:29 am
E is also incorrect coz

Because up to five percent of a car's fuel are wasted

Subject Verb agreement
++++++++++++++++++++++++++++++
Shawshank Redemtion -- Hope is still alive ...
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by kvcpk » Fri Jun 25, 2010 4:58 am
nikhilkatira wrote:OA is B.

I eliminated A on the basis of usage of 'since' .
Hi Nikhil,

What is the usage of 'Since'? I was not able to eliminate A so easily. So wanted to know the usage of "Since" here.
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by GMATGuruNY » Fri Jun 25, 2010 5:50 am
nikhilkatira wrote:Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by under inflation.

(A) Car owners who inflate their tires properly can substantially boost their vehicles' fuel efficiency, since the increase in car-road friction can waste up to five percent of car fuel by under inflation.

(B) Because the under inflation of tires can waste up to five percent of a car's fuel by increasing car-road friction, car owners can substantially boost their vehicles' fuel efficiency by properly inflating the tires.
Eliminate A because of the misplaced modifier by under-inflation. This prepositional phrase seems to want to modify the verb waste, but you can't waste by under-inflation. If we can't figure out what the phrase by under-inflation is modifying, then answer choice A can't be correct.

Regarding usage of the word since:

A purist will claim that the word since should refer only to the passing of time:

Since the beginning of the year, I have memorized 100 GMAT idioms.

Even I'm not that pure. And I'm pretty pure.

Most (if not all) dictionaries will tell you that since and because are synonymous. So I wouldn't eliminate answer choice A because of the word since. We need a better reason: the misplaced modifier by under-inflation.
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