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RAGCT 2015 Day 7: Studies have shown that regularly used

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RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.

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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 22 Jul 2015, 01:33
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souvik101990 wrote:
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Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.

Day 7 Question of the Verbal Contest: Race Against the GMAT Club Timer
Please make sure to post a brief reply without revealing your solution to enter the contest!


Here is what the argument says:

- Washing machines are teeming with bacteria that can cause infections.
- Rinsing these machines with bleach (note that it doesn't say concentrated bleach/diluted bleach and doesn't talk about the amount of bleach to be added) gets rid of such bacteria.
- However concentrated bleach can severely corrode the metal drum in the machines.

Conclusion: Thus, diluted bleach is an effective and safe means of eliminating any health risks from such washing machines.

There are various questions that can be raised to weaken the conclusion.
At what level of dilution is the bleach effective and safe?
Is bacteria the only health risk in the washing machines?
Does the beach itself leave deposits in the machine and create health risks?

Option (A) says that the machines have many other pathogens. We don't know whether the bleach is effective on them or not. Hence, we cannot say that bleach will eliminate all health risks. Hence it weakens the conclusion.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.
It tells us that diluted bleach is effective (and safe). Hence it strengthens our conclusion.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.
Irrelevant. It tells us that suitably diluted bleach is available.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.
Gives more information about the first sentence of the argument. Has no connection to the conclusion that bleach is effective in eliminating all health risks.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.
Gives another method of eliminating health risks. Does not weaken that bleach in effective in eliminating health risks.

Answer (A)
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 09:47
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Good question !!
But took more than 2 mins.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 10:26
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Great question. Hope I am correct.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 11:25
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souvik101990 wrote:

Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Labels:
background
premise
Counter premise
Conclusion

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.other bacteria is out of scope

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.strengthens the argument

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.the option is not definitive; can be parked for later review.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.Irrelevant. We are concerned about bleaches being effective or not

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.If this is so then there is another more efficient way of killing bacteria

Day 7 Question of the Verbal Contest: Race Against the GMAT Club Timer
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Between C & E I chose E.

Awaiting OA.

Rgds,
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 11:41
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A (IMHO) the argument says "effective means of eliminating any health risks from such washing machines", not just bacteria, so even when you kill bacteria with wtvr bleach you use, health is still endangered by other harmful means aka pathogens.

narmadadhruv

Choice E deals with bugs, not bacteria... aren´t you assuming they both pose the same threat?

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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 11:56
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souvik101990 wrote:
Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.


A for me.

Conclusion states that "as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines"

Since A states that there are other pathogens in machines, this weakens the claim.

Hence answer is A
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 12:54
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souvik101990 wrote:
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Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.

Day 7 Question of the Verbal Contest: Race Against the GMAT Club Timer
Please make sure to post a brief reply without revealing your solution to enter the contest!


Conclusion: diluted bleach is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines than undiluted bleach.

A.Out of scope. Not related to conclusion or argument at all.
B. Seems to be good. If undiluted is not more powerful then it may not harm machines more than diluted bleach. Lets keep it aside.
C.Does not help to weaken as we don't know whether it is diluted or not.
D.Out of scope.
E. Out of scope.

B is correct.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 13:12
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Conclusion - Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

According to option A, if there are other pathogens etc. present then the conclusion is weakened.

What is OA.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 13:20
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Conclusion structure: X is an effective method of eliminating any health risks.

Weakener is such case will be any information which says X eliminates most but not all health risks.

A. This is in line what we want

B.This actually strengthens the conclusion

C.No useful info

D.No useful info

E.It says Z is also a means of eliminating health risk.Using an alternate means does not weaken anything related to X.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 13:42
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abhishek05 wrote:
Conclusion structure: X is an effective method of eliminating any health risks.

Weakener is such case will be any information which says X eliminates most but not all health risks.

A. This is in line what we want

B.This actually strengthens the conclusion

C.No useful info

D.No useful info

E.It says Z is also a means of eliminating health risk.Using an alternate means does not weaken anything related to X.

I agress to above point, the conclusion states any health risks, so if we have answer choice that can prove there are some pathogens which still survive/ are not affected, the answer choice should be in reckoning.

Why not E? Because we are only concerned about the effects of diluted bleach on the bacteria and not of any other agents.

My two cents!
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 14:16
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Done in 1:04

Looking forward to the OA and hoping for some Kudos :P





souvik101990 wrote:
Image

Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.

Day 7 Question of the Verbal Contest: Race Against the GMAT Club Timer
Please make sure to post a brief reply without revealing your solution to enter the contest!

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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 21:49
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good question took me over 2 minutes to solve
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 21 Jul 2015, 23:37
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Seemed pretty straightforward. I hope there is no trick here.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 22 Jul 2015, 01:23
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souvik101990 wrote:
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Studies have shown that regularly used household washing machines are teeming with bacteria that find their way onto our clothes and consequently onto us, causing various bacterial infections. Rinsing these machines with bleach is an effective way to get rid of such bacteria. However, certain other studies have shown that bleach, when used in the undiluted form, can severely corrode the metal drum in the machines. Thus, bleach, as long as it is diluted properly, is an effective means of eliminating any health risks from such washing machines, with no harmful effects on these machines.

Which of the following, if true, weakens the argument above?

A. Studies have shown that besides bacteria, many other kinds of pathogens can be found in regularly used washing-machines.

B. Undiluted bleach is not more powerful than diluted bleach in killing bacteria.

C. Many companies come with gentle bleach blends that do not corrode the metal drum of the household washing machines.

D. Various studies have shown that certain bacteria can live outside the human body for long periods of time on various objects such as clothes, toys etc.

E. Most household washing machines come with a hot-water cycle that is set at a temperature of 90 degrees Celsius, a temperature that has been cited as ideal for killing various disease-causing bugs in these machines.

Day 7 Question of the Verbal Contest: Race Against the GMAT Club Timer
Please make sure to post a brief reply without revealing your solution to enter the contest!


Good qn. Hope I am right.
First it says that Bleach is an effective way to get rid of such "bacteria". Then in conclusion it says that " is an effective means of eliminating any health risks ". This is a big leap with no support.
So if it is shown that other than bacteria some other thing is there that bleach can't handle, that can be the answer.

E looks like an alternate cause, but this scenario has not occurred yet. So there is always a possibility of other cause to arrive at the effect. So this alternate cause can't be a valid weakener.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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michaelyb wrote:
A (IMHO) the argument says "effective means of eliminating any health risks from such washing machines", not just bacteria, so even when you kill bacteria with wtvr bleach you use, health is still endangered by other harmful means aka pathogens.

narmadadhruv

Choice E deals with bugs, not bacteria... aren´t you assuming they both pose the same threat?

Regards,


Thanks for pointing that out! But the other in option A troubles me.

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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 22 Jul 2015, 14:36
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waiting for the answer to this one

I went with E because my undertsanding of the conclusion was that, it was "considering bleach" as the only way to eliminate bacteria

If hot water can kill bugs then it should be able to kill bacteria...

But i kinda see the reasoning behind A
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 22 Jul 2015, 18:31
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narmadadhruv wrote:
michaelyb wrote:
A (IMHO) the argument says "effective means of eliminating any health risks from such washing machines", not just bacteria, so even when you kill bacteria with wtvr bleach you use, health is still endangered by other harmful means aka pathogens.

narmadadhruv

Choice E deals with bugs, not bacteria... aren´t you assuming they both pose the same threat?

Regards,


Thanks for pointing that out! But the other in option A troubles me.

Regards,
Dhruva


Hi,
the catch word is OTHER.. this means there are various other pathogens other than bacteria that can cause diseases..
However the argument shifts the focus from bacteria to no health risks atall
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 22 Jul 2015, 22:53
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the argument is taking a leap from bacteria to no health risks, without any support. The correct choice will highlight this shortcoming.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used  [#permalink]

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New post 23 Jul 2015, 10:30
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A is pretty straight forward. These seemingly straightforward questions in the garb of "700 level CR" always trick me :cry: . I hope i'm correct.
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Re: RAGCT 2015 Day 7: Studies have shown that regularly used &nbs [#permalink] 23 Jul 2015, 10:30

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