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Scientists at the Los Alamos lab

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Scientists at the Los Alamos lab [#permalink] New post 11 Sep 2013, 20:35
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (02:01) correct 41% (01:15) wrong based on 80 sessions
Hi,

Scientists at the Los Alamos National Laboratory have succeeded 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



In the above question :

The actual sentence has problem in modifier as enough of minning heat and producing energy does not make sense ,we need something that says energy produced ,which is enough for efficient generation of electricity and heat .

So based on this analysis we have only two choices D,E .

Now in choice D :

something is done to produce energy , and that energy is enough for generating electricity efficiently and for heating

I agree that this choice maintains parallelism , but here the modifer efficiently is used only for electricity but not for heat .

Hence I eliminated this choice

In Choice E :

something is done to produce enough energy for efficient generation for electricity and heat

The problem with this sentence is that it changes the meaning by saying something is done to produce enough energy (i.e not energy but enough energy), but the other problem related to modifier in the 2nd part of this sentence -"efficient generation of electricity and heat"-has been rectified .


My question is how to choose between the above 2 choices .

Thanks,
Deepak
[Reveal] Spoiler: OA
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Re: Scientists at the Los Alamos lab [#permalink] New post 12 Sep 2013, 19:52
Even in the original sentence, there are two things being accomplished by energy:

1. Efficient generation of electricity
2. Heating factories and homes

So, D is not changing the meaning of the original sentence.

E has a classical parallelism issue. The right side of and has heat. So, there must be something on the left side of and that is parallel to heat. What is on the left side of and that is parallel to heat? Let’s look at the sentence with choice E:

Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth’s interior to produce enough energy on a commercial scale for efficient generation of electricity and heat factories and homes

Well, on the left side, the closest entity parallel to heat is produce!! So, E has the following meaning:

Scientists have succeeded in mining heat from the Earth’s interior to:

1. produce energy for efficient generation of electricity and
2. heat factories and homes

At the very least, the meaning portrayed above is a deviation from the intended meaning, which is:

Scientists have succeeded in mining heat from the Earth’s interior to produce energy enough for:

1. generating electricity efficiently
2. heating factories and homes
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Re: Scientists at the Los Alamos lab [#permalink] New post 12 Sep 2013, 21:09
Expert's post
deepak1990verma wrote:
Hi,

Scientists at the Los Alamos National Laboratory have succeeded 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



In the above question :

The actual sentence has problem in modifier as enough of minning heat and producing energy does not make sense ,we need something that says energy produced ,which is enough for efficient generation of electricity and heat .

So based on this analysis we have only two choices D,E .

Now in choice D :

something is done to produce energy , and that energy is enough for generating electricity efficiently and for heating

I agree that this choice maintains parallelism , but here the modifer efficiently is used only for electricity but not for heat .

Hence I eliminated this choice

In Choice E :

something is done to produce enough energy for efficient generation for electricity and heat

The problem with this sentence is that it changes the meaning by saying something is done to produce enough energy (i.e not energy but enough energy), but the other problem related to modifier in the 2nd part of this sentence -"efficient generation of electricity and heat"-has been rectified .


My question is how to choose between the above 2 choices .

Thanks,
Deepak


Hi Deepak,

Let me write the original sentence again.

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

In the original sentence, “efficient” is modifying only “generation of electricity”.
This is because it is non sensical to say that mining heat and production of energy provide efficient heating at homes.
Similarly the original sentence only conveys “generation of electricity”.
“heating homes and factories” is not connected to the “generation” part.
So “efficient generation” and “heating” are parallel in this sentence.

The error in this sentence is the representation of “mining” and “producing” as separate independent entities. (As you have mentioned).
Choice D appropriately rectifies this error.

Now let us look at the whole sentence with choice E.

    • Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth’s interior to produce enough energy on a commercial scale for efficient generation of
      o electricity and
      o heat
    factories and homes

Can you see that there is a dangling noun at the end without any proper connection?

This is a very obvious error and can be used as a strong reason to eliminate option E, even if you understood the meaning in a different sense.

Hope this helps! :)

Regards,
Krishna
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Re: Scientists at the Los Alamos lab   [#permalink] 12 Sep 2013, 21:09
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