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While spark ignitions start the combustion in gasoline engines, typica

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Magoosh GMAT Instructor
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While spark ignitions start the combustion in gasoline engines, typica [#permalink]

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New post 02 Jun 2017, 15:50
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Question Stats:

46% (01:06) correct 54% (01:07) wrong based on 292 sessions

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While spark ignitions start the combustion in gasoline engines, typical in automobiles, high compression of gases, with high temperatures, are igniting the combustion in diesel engines.

(A) high compression of gases, with high temperatures, are igniting the combustion in diesel engines

(B) the high temperatures made by high compression of gases, igniting the fuel in diesel engines

(C) diesel engines highly compress the gasses, and this high compression ignites the combustion of the fuel in the engine

(D) high compression of gases, producing high temperatures, ignite the combustion in diesel engines

(E) it is the high compression of gases, causing high temperatures, that ignites the fuel in diesel engines


For the OE, see:
GMAT Grammar: “On a White Bus” with Subordinate Conjunctions

Mike :-)
[Reveal] Spoiler: OA

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Re: While spark ignitions start the combustion in gasoline engines, typica [#permalink]

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New post 02 Jun 2017, 16:15
Thanks for detailed explanation in the referred link.
The only challenge I see in E is that it assumes that the reader knows:
combustion = igniting the fuel
and that the above "does not change the meaning".

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Re: While spark ignitions start the combustion in gasoline engines, typica [#permalink]

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New post 05 Jun 2017, 10:12
sevenplusplus wrote:
Thanks for detailed explanation in the referred link.
The only challenge I see in E is that it assumes that the reader knows:
combustion = igniting the fuel
and that the above "does not change the meaning".

Dear sevenplusplus,

Thank you for your feedback, my friend. :-) I point out that (A) says "igniting the combustion" and (E) says "ignites the fuel." Basically, folks need to know that "to ignite" means "to set on fire, to start a fire," and that "combustion" is "fire"--those are basic English vocabulary terms. They also need to know the factual information that what burns in a car engine, what is set on fire, is fuel: I would take that as basic factual knowledge about the world that people need to have. Therefore, I don't believe anyone with requisite GMAT skills can argue that there's a change in meaning here.

Does all this make sense?
Mike :-)
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Re: While spark ignitions start the combustion in gasoline engines, typica [#permalink]

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New post 15 Jun 2017, 12:24
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Between D and E. I find D is having a subject verb agreement error.

D - high compression of gases, producing high temperatures, ignite the combustion in diesel engines.

Though E seems a bit wordy. It is grammatically right and aptly expressing the intended meaning.

Hence, Answer should be E.

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While spark ignitions start the combustion in gasoline engines, typica [#permalink]

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New post 21 Sep 2017, 06:56
Hi Mike,

Please evaluate my reasoning for this question.

While spark ignitions start the combustion in gasoline engines, typical in automobiles, high compression of gases, with high temperatures, are igniting the combustion in diesel engines.

(A) high compression of gases, with high temperatures, are igniting the combustion in diesel engines.
WRONG - 1. incorrect to use present progressive
2. subject verb agreement as boldfaced


(B) the high temperatures made by high compression of gases, igniting the fuel in diesel engines

WRONG - missing verb error, igniting is participle

(C) diesel engines highly compress the gasses, and this high compression ignites the combustion of the fuel in the engine

WRONG - awkward construction, also change in meaning -> diesel engines compress the gas.

(D) high compression of gases, producing high temperatures, ignite the combustion in diesel engines

WRONG - Subject verb error - as highlighted by bold face

(E) it is the high compression of gases, causing high temperatures, that ignites the fuel in diesel engines

CORRECT - corrects subject - verb error as other options have, also gives correct meaning.

Thanks

Kudos [?]: 9 [0], given: 90

While spark ignitions start the combustion in gasoline engines, typica   [#permalink] 21 Sep 2017, 06:56
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