Scientists at the Los Alamos National Laboratory have : GMAT Sentence Correction (SC)
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# Scientists at the Los Alamos National Laboratory have

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Scientists at the Los Alamos National Laboratory have [#permalink]

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16 Jul 2006, 05:59
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86% (03:46) correct 14% (01:52) wrong based on 10 sessions

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Scientists at the Los Alamos National Laboratory have suceeded for the first time in mining heat from the Earth's interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

(A) and producing energy on a commercial scale, enough for efficient generation of electricity and heating
(B) and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat
(C) for energy production on a commercial scale, enough for generating electricity efficiently and to heat
(D) to produce energy on a commercial scale, enough for generating electricity efficiently and for heating
(E) to produce enough energy on a commercial scale for efficient generation of electricity and heat
If you have any questions
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16 Jul 2006, 08:02
Don't you think that "enough for efficient generation of electricity and heating" means efficient generation of both electricity and heating? I think they are mining heat to generate electricity, so A and B are out. C is awkward and E has the same problem as A does. So my answer is D.
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16 Jul 2006, 09:52
I'll go with Shoonya's logic. Mining heat from the Earth's interior leads to producing energy .
Hence .. 'D'
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16 Jul 2006, 12:03
shoonya wrote:
Don't you think that "enough for efficient generation of electricity and heating" means efficient generation of both electricity and heating? I think they are mining heat to generate electricity, so A and B are out. C is awkward and E has the same problem as A does. So my answer is D.

A it is...

They are mining heat to generate energy. From this energy they produce electricity and heat... at least thats what I thought
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Re: SC - Los Alamos National Laboratory (from GMATPrep) [#permalink]

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16 Jul 2006, 23:05
likar wrote:
Scientists at the Los Alamos National Laboratory have suceeded for the first time in mining heat from the Earth's interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

(A) and producing energy on a commercial scale, enough for efficient generation of electricity and heating
(B) and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat
(C) for energy production on a commercial scale, enough for generating electricity efficiently and to heat
(D) to produce energy on a commercial scale, enough for generating electricity efficiently and for heating
(E) to produce enough energy on a commercial scale for efficient generation of electricity and heat

I'll go with D. First off, we're trying to mine heat to/for producing energy. Mining heat is not something that we're doing along with producing energy. This, IMO makes A and B incorrect.

C: "for generating electricity" does not agree in tense with "to heat"
E: "for efficient generation of electricity and heat factories and homes" sounds incorrect
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16 Jul 2006, 23:21
ps_dahiya wrote:
Should be A.

Read the entire sentence and you will soon discover that A really doesn`t make much sense. As if the scientists were successful in BOTH mining heat from the earth AND producing energy.

Also, note that A is stated in the passive voice: ---> enough for efficient generation of electricity and heating

"to" in (D) clearly shows the purpose (or application) of why the mining was successful: ---> to produce energy on a commercial scale

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16 Jul 2006, 23:25
Will go with A.
For ||ism and also other options change the meaning a bit
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Re: SC - Los Alamos National Laboratory (from GMATPrep) [#permalink]

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17 Jul 2006, 00:36
likar wrote:
Scientists at the Los Alamos National Laboratory have suceeded for the first time in mining heat from the Earth's interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

(A) and producing energy on a commercial scale, enough for efficient generation of electricity and heating
(B) and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat
(C) for energy production on a commercial scale, enough for generating electricity efficiently and to heat
(D) to produce energy on a commercial scale, enough for generating electricity efficiently and for heating
(E) to produce enough energy on a commercial scale for efficient generation of electricity and heat

Good question.

It's D.

- We need "to" to show the purpose.
- "for generating" and "for heating" are ||.

In A, we are lacking "to".
Moreover, "for efficient generation" and "heating" are not ||.

Regards,
Brajesh
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17 Jul 2006, 00:50
Picking D.
One reason being the explainations above that scientists are mining heat to produce energy.
Also ,D seems more ||.

Scientists at the Los Alamos National Laboratory have suceeded for the first time in mining heat from the Earth's interior to produce energy on a commercial scale, enough for generating electricity efficiently and for heating factories and homes.
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17 Jul 2006, 01:05
'and' is out --> the underlined portion is an effect of mining heat from the Earth's interior and not part of it. (A,B out)

C - lacks parallelism
E - 'and heat' changes the meaning of the sentence

D is best.
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17 Jul 2006, 04:02
The OA is (D). It's great that so many people got this one right!

Btw. This is probably one of the hardest SCs you will get in GMATPrep. I got it as the last SC in the test and my final verbal score was 49, so I guess it can't get much harder than this.
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17 Jul 2006, 04:24
likar wrote:
The OA is (D). It's great that so many people got this one right!

Btw. This is probably one of the hardest SCs you will get in GMATPrep. I got it as the last SC in the test and my final verbal score was 49, so I guess it can't get much harder than this.

Wow, a V49 score is off the charts!
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17 Jul 2006, 04:43
Well, it was a 2nd retake of GMATPrep CAT1, so the score is not that much representative . Basically, all CRs were repeated (so I spared some time), but I haven't seen 90% of SCs before this test (apparently GMATPrep has a huge database of SCs) and also most passages were new to me.
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17 Jul 2006, 07:01
shoonya wrote:
Don't you think that "enough for efficient generation of electricity and heating" means efficient generation of both electricity and heating? I think they are mining heat to generate electricity, so A and B are out. C is awkward and E has the same problem as A does. So my answer is D.

However, "enough for efficient generation of electricity and heating" is a modifier. should it not be close to the noun, that is 'energy'?
17 Jul 2006, 07:01
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