If the needle on an industrial sewing machine becomes badly : GMAT Critical Reasoning (CR)
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# If the needle on an industrial sewing machine becomes badly

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14 Jul 2010, 12:33
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If the needle on an industrial sewing machine becomes badly worn, the article being sewn can be ruined. In traditional apparel factories, the people who operate the sewing machines monitor the needles and replace those that begin to wear out. Industrial sewing operations are becoming increasingly automated, however, and it would be inefficient for a factory to hire people for the sole purpose of monitoring needles. Therefore a sophisticated new acoustic device that detects wear in sewing machine needles is expected to become standard equipment in the automated apparel factories of the future.
Which one of the following is most strongly supported by the information above?
(A) In automated apparel factories, items will be ruined by faulty needles less frequently than happens in traditional apparel factories.
(B) In the automated apparel factories of the future, each employee will perform only one type of task.
(C) Traditional apparel factories do not use any automated equipment.
(D) The needles of industrial sewing machines wear out at unpredictable rates.
(E) As sewing machine needles become worn, the noise they make becomes increasingly loud.
[Reveal] Spoiler: OA

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14 Jul 2010, 21:35
D
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15 Jul 2010, 00:47
D is the winner here.
A) No information regarding the frequency is provided.
B) Irrelevant
C) They might be using automated machines but not for this purpose.
D) This makes sense. If they wear out at unpredictable rates, there is a need to automate the process because if they wear out at a predictable rate, a routine maintenance activity can replace them manually.
E) The acoustic system can work on sound but no specific detail about whether the noise would be loud is provided. The trigger can be anything like screeching sound or something.
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02 Aug 2010, 13:10
Why D ........E for me .........
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02 Aug 2010, 13:12
As sewing machine needles become worn, the noise they make becomes increasingly loud. so the acoustic device detects
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02 Aug 2010, 13:20
vudsri000 wrote:
As sewing machine needles become worn, the noise they make becomes increasingly loud. so the acoustic device detects

that was also my thought
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02 Aug 2010, 21:26
Another one for E.

D. Whether the needles wear out at a predictable rate is irrelevant and not the most strongly supported statement.

The argument concludes with words to the affect of "A new acoustic device will detect when a needle is worn out"...which implies that the acoustic device can do it's job (detect the sounds associated with worn out needles).

If that actual OA is D, it seems as though the argument hinges upon a flaw in the acoustice device, but there is never any verbiage stating (or even implying) that.

Am open to an OE.
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02 Aug 2010, 22:46
noboru wrote:
vudsri000 wrote:
As sewing machine needles become worn, the noise they make becomes increasingly loud. so the acoustic device detects

that was also my thought

Hi all

lets negate E
As sewing machine needles become worn, they dont make increasingly loud noise.--means that when the needles worn out, they dont make make enough noise, consequently it becomes difficult to detect damaged needles. Therefore sophisticated new acoustic device is required to detect wear in sewing machine needles.---does the argument fall apart ? no it doesn't.

lets negate D now,
The needles of industrial sewing machines does not wear out at unpredictable rates.---if the needles does not wear out then whats the actual use of a sophisticated new acoustic device that detects wear in sewing machine needles ? The acoustic device can be put in place only if the needles wear out and wear out at unpredictable rates.--the conclusion falls apart.

hegating is a very useful technique for solving Assumptions and Strengthen arguments. strengthening the argument is like finding the assumption, in both instances we fill the logic gap.

This is an ezy ergumnt. The ans is straight D. At least without difficulty the options can be narrowed to D and E. In fact you need not negate to waste time(on test day). Negation here is just for your understanding.

thnx
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03 Aug 2010, 05:09
+1 for D
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03 Aug 2010, 11:28
+1 for D because since they wear out inconsistently it would then have a greater need for a device that can monitor this.

E has no relevance because it just talks about some noise and not about the performance of the needle.
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04 Aug 2010, 06:01
D is best here.

E is irrelevent. Nothing in the argument talks about the noisiness of needles.
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04 Aug 2010, 09:23
I'm still not convinced y it cannot be E...
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05 Aug 2010, 12:22
What is the source of this question?????
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05 Aug 2010, 12:35
shalu wrote:
What is the source of this question?????

x2
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05 Aug 2010, 16:55
D for me.
Answer choice says that the noise needles makes becomes increasingly louder. May be the noise doesn't get louder but something else changes, like the pitch.
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05 Aug 2010, 17:19
noboru wrote:
If the needle on an industrial sewing machine becomes badly worn, the article being sewn can be ruined. In traditional apparel factories, the people who operate the sewing machines monitor the needles and replace those that begin to wear out. Industrial sewing operations are becoming increasingly automated, however, and it would be inefficient for a factory to hire people for the sole purpose of monitoring needles. Therefore a sophisticated new acoustic device that detects wear in sewing machine needles is expected to become standard equipment in the automated apparel factories of the future.
Which one of the following is most strongly supported by the information above?
(A) In automated apparel factories, items will be ruined by faulty needles less frequently than happens in traditional apparel factories.
(B) In the automated apparel factories of the future, each employee will perform only one type of task.
(C) Traditional apparel factories do not use any automated equipment.
(D) The needles of industrial sewing machines wear out at unpredictable rates.
(E) As sewing machine needles become worn, the noise they make becomes increasingly loud.

The answer is certainly D. If needles wore out at predictable rates, then the factories could predict when to replace them. They wouldn't need any special device to know when to change their needles.

E is a red herring. Sure, we know that an acoustic device can somehow detect faulty needles, but we have no idea *how* the acoustic device does this. Perhaps the faulty needles are louder than good needles, but it's just as possible that they're quieter, or that good needles maintain a steady pitch while the pitch of a faulty needle undulates like a police siren, with no difference in loudness. We have no clue from the passage how the acoustic properties of good needles and of faulty needles differ, so E is in no way supported.
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06 Aug 2010, 04:58
D is essential to the argument. If the rate is predictable they won't hire people or throw money in the monitoring process.
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06 Aug 2010, 07:49
A) In automated apparel factories, items will be ruined by faulty needles less frequently than happens in traditional apparel factories. <there is no comparison of efficiency given in the argument>
(B) In the automated apparel factories of the future, each employee will perform only one type of task. <kind of goes against the argument>
(D) The needles of industrial sewing machines wear out at unpredictable rates.<bingo, if the rate was predictable we would not need an automated system>
(E) As sewing machine needles become worn, the noise they make becomes increasingly loud. <is the sound relevant>
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14 Aug 2010, 05:20
D
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18 Aug 2010, 01:41
D
Re: needle   [#permalink] 18 Aug 2010, 01:41

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