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Even in this age of conservation, cooking ranges that consume fossil

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Re: Even in this age of conservation, cooking ranges that consume fossil  [#permalink]

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New post 28 Nov 2017, 13:16
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egmat wrote:
Ravindra.here wrote:
well i don't agree with your explanation. Clearly , it seems like producing is a present participle
that is referring to cooking ranges that use fossil fuel .However, here producing is modifying ""those""
and the best construction , which is ANSWER B, compares the heat produced by Magnetic resonance cooking ranges
to the heat produced by one of the fossil fuels , natural gas.
As you said we are comparing heat produced by fossil fuels to heat produced by natural gas is wrong according to me.
And that is why option b adds a verb after natural gas in b



Hello Ravindra.here,

I agree to your analysis. Good observation points there. :-)

The approach to solve this question is simple - focus on the intended comparison.

The sentences compares two kinds of cooking ranges. They have been compared because one produces heat more efficiently than the other.

However, Choices A, C, and E presents ambiguous comparison because in the absence of the helping verb does, we can infer two comparisons in these choices:

Comparison 1: Cooking ranges that rely on magnetic resonance produce heat more efficiently than natural gas produces. Entities compared: Cooking ranges that rely on magnetic resonance and natural gas.


Comparison 2: Cooking ranges that rely on magnetic resonance produce heat more efficiently than natural gas. Entities compared: heat and natural gas.

Per the context of the sentence, Comparison 2 does nit make any sense because fossil fuels are natural gas only.

Hence, we must repeat the helping verb does to make the comparison clear.

This analysis leaved us with Choice B and D.

Use of which is incorrect in Choice D as which refers to magnetic resonance. Per the context of the sentence, magnetic resonance is not the part of comparsion. Hence, Choice D is correct.

Choice B is the clear winner.


Hope this helps. :-)
Thanks.
Shraddha


Hi,

As per the usage of ',' + verb-ing modifier, it shall modify preceding clause(precisely the verb in the clause)
Also as e-gmat mentions in the course, the doer of the verb and the modifier should always be same.

Could you please advise what is being modified and who is the doer in this case
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Re: Even in this age of conservation, cooking ranges that consume fossil  [#permalink]

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New post 03 Feb 2019, 01:47
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How to choose between B vs D
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Even in this age of conservation, cooking ranges that consume fossil  [#permalink]

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New post 03 Feb 2019, 02:15
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Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.

A. producing heat more efficiently than natural gas
B. producing heat more efficiently than natural gas does
C. which produce heat more efficiently than natural gas
D. which produce heat more efficiently than natural gas does
E. much more efficient at producing heat than natural gas

Option B: There seems to be a misconception about what is the real previous clause that the comma + verb+ing modifier is modifying. It is not the clause starting with the cooking ranges that consume fossil fuels (incidentally. natural gas is one such fossil fuel), but the relative clause that starts with the demonstrative pronoun -- 'those' that rely on MR. -- Therefore, it is clear that 'producing heat more efficiently than natural gas does" is justly modifying the cooking ranges that rely on MR
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Re: Even in this age of conservation, cooking ranges that consume fossil  [#permalink]

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New post 03 Feb 2019, 02:24
daagh sir

I understand that “ producing heat....” refers to MR based cooking ranges .

However my doubt is that we are comparing cooking ranges to natural gas , I was thinking as below

“Producing heat more efficiently than those using natural gas do “

Am I thinking too literally ?

How to deal with such subtle questions ?
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Re: Even in this age of conservation, cooking ranges that consume fossil  [#permalink]

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New post 03 Feb 2019, 02:59
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Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.

A. producing heat more efficiently than natural gas
B. producing heat more efficiently than natural gas does
C. which produce heat more efficiently than natural gas
D. which produce heat more efficiently than natural gas does
E. much more efficient at producing heat than natural gas

Option B: There seems to be a misconception about what is the real previous clause that the comma + verbing modifier is modifying. It is not the clause starting with the cooking ranges that consume fossil fuels (incidentally. natural gas is one such fossil fuel), but the relative clause that starts with the demonstrative pronoun -- 'those' that rely on MR. -- Therefore, it is clear that 'producing heat more efficiently than natural gas does" is justly modifying the MR based cooking ranges.

We can see that essentially, there are two comparisons involved in this hard nut of the question.
The first is the comparison between the cooking ranges of fossil fuels and the MRs. The first "than" marks this comparison.

The second one is about which produce shet more efficiently, whether NG or MR. The second 'than' signifies this aspect.

Both the comparisons should be dealt with one-on-one, like A vs. B and C vs. D but not A vs.C and B vs. D.
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Re: Even in this age of conservation, cooking ranges that consume fossil   [#permalink] 03 Feb 2019, 02:59

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