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Engineer: Thermophotovoltaic generators are devices that convert heat

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Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 10 Aug 2017, 01:31
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Engineer: Thermophotovoltaic generators are devices that convert heat into electricity. The process of manufacturing steel produces huge amounts of heat that currently go to waste. So if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money.

Which one of the following is an assumption on which the engineer’s argument depends?

(A) There is no other means of utilizing the heat produced by the steel-manufacturing process that would be more cost effective than installing thermophotovoltaic generators.

(B) Using current technology, it would be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity.

(C) The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would be sufficient to cover the cost of purchasing and installing those generators.

(D) At least some steel-manufacturing plants rely on electricity as their primary source of energy in the steel-manufacturing process.

(E) There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity.

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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 10 Aug 2017, 10:52
For me the answer is C

A ->There is no other means that wud b more cost effective than installing TPG ( but the argument is concerned on the effective savings by installing TPG) -eliminate
B ->Whether it is possible to generate Electricity through TPG using present tech -Out of scope -eliminate
D ->Whether SM Plants rely on electricity as primary(not relevant wrt the argument) energy source - eliminate
E ->There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if ( no where mentioned that there is no other effective way) -eliminate

So answer is C
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 10 Aug 2017, 11:32
Option c takes into the consideration of added assumption not supported by the original argument. Savings that is discussed in the argument is by reducing outside electricity, not by comparing it with that of machine installation and operation.

Option D however looks like an assumption to me.

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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 18 Aug 2017, 09:02
Masshole wrote:
Engineer: Thermophotovoltaic generators are devices that convert heat into electricity. The process of manufacturing steel produces huge amounts of heat that currently go to waste. So if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money.

Which one of the following is an assumption on which the engineer’s argument depends?

(A) There is no other means of utilizing the heat produced by the steel-manufacturing process that would be more cost effective than installing thermophotovoltaic generators.

(B) Using current technology, it would be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity.

(C) The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would be sufficient to cover the cost of purchasing and installing those generators.

(D) At least some steel-manufacturing plants rely on electricity as their primary source of energy in the steel-manufacturing process.

(E) There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity.

Source: LSAT


By POE I went for C but I have a doubt that in terms of saving money isn't this option talking about the one time cost i.e installation cost and if yes then how can we assume they will be saving money on electric bills in future.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 31 Aug 2017, 08:43
My first choice was e. (E) There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity.

If we negate e - there are no steel manu. plants that could reduce electricity bill only by using some method to convert heat into electricity. This certainly weakens the conclusion.
Can someone throw light on this argument's flaw.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 02 Sep 2017, 11:26
Could any experts verify this answer? I think the answer is B.

The conclusion focuses on reducing electric bill. Therefore the core assumption of the argument must be that at least some of the heat produced can be converted to electricity to save electricity!
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 02 Sep 2017, 12:00
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Engineer: Thermophotovoltaic generators are devices that convert heat into electricity. The process of manufacturing steel produces huge amounts of heat that currently go to waste. So if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money.

Which one of the following is an assumption on which the engineer’s argument depends?

(A) There is no other means of utilizing the heat produced by the steel-manufacturing process that would be more cost effective than installing thermophotovoltaic generators. -We are concerned only about the generators. Plus, this is an exaggerated statement, we are not worried about the presence of any other technology.

(B) Using current technology, it would be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity. -We know this information from the passage. This is not an assumption.

(C) The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would be sufficient to cover the cost of purchasing and installing those generators. -Correct. If the plants are unable cover the costs of installation then there will be no use of installing the generators.

(D) At least some steel-manufacturing plants rely on electricity as their primary source of energy in the steel-manufacturing process. -Okay. This is a fact set. Plus, we are not worried about the source of energy of the plants. We are concerned about the conversion of heat to electricity via generator.

(E) There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity. -Okay, this is also a fact set. We are concerned about those plants only which can reduce their electricity bill
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 02 Sep 2017, 14:03
How C? If I negate option C, the argument it does not break the conclusion. Manufacturing plants can still save money by installing generators irrespective whether the money saved is sufficient to purchase and install generators.

Option B is an implicit assumption and its negation implies that there is no technology to covert heat to electricity. So no saving on electric bills.
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Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 02 Sep 2017, 14:24
Ans. C.

Was between B and C for me. The conclusion is: by converting the heat to electricity, the mfgs would save money.

B is slightly out of scope, because the passage presents the possibility of the conversion almost as a hypothetical "if steel mfgs could feed the heat...". So we are trying to determine if we could save money using this method, not determining if it is possible. B also doesn't address how money would be saved, it just says that it is possible. For all we know, its possible at a huge cost that would far outweigh any savings.

C supports the conclusion directly- the savings would cover the costs of buying/installing the equipment. If you negated C so that the savings wouldn't cover the costs of installation, you couldn't necessarily claim that the mfgs would save money by implementing it.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 02 Sep 2017, 14:26
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hwgmat2015 wrote:
How C? If I negate option C, the argument it does not break the conclusion. Manufacturing plants can still save money by installing generators irrespective whether the money saved is sufficient to purchase and install generators.

Option B is an implicit assumption and its negation implies that there is no technology to covert heat to electricity. So no saving on electric bills.


Hi,

Lets try negating option C first:

(C) The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would be sufficient to cover the cost of purchasing and installing those generators.

Negation: "The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would NOT be sufficient to cover the cost of purchasing and installing those generators."

This clearly means that if the plants are unable cover the costs of installation then there will be no use of installing the generators, since at the end of the day money matters. This is clearly weakening the argument since the passage states -->"So if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money."

The owners won't be able to save money. Thus the negation simply breaks the argument apart.

Now lets have a look at option B

(B) Using current technology, it would be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity.

Following are my observations:
1. This is nothing restating what is already given in the passage. We are talking about saving money in the passage by converting heat into electricity. We already know that the generator will change heat into electricity.
2. We already know from the passage that heat can be converted into electricity, thus we are concentrating only on those plants that are capable of achieving such a feat.
3. Even if the plants are NOT able to convert heat into electricity by feeding heat into the generator, then also the argument stands.
Quote:
So if steel-manufacturing plants could feed the heat they produce
--> we are talking about the possibility. If heat is fed then we should be able to economically convert heat into electricity. Our main goal is "SAVING MONEY".

Option B doesn't take into account 'money' factor. Hence wrong.

Hope that helps!!
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 09 Sep 2017, 09:55
Thanks gmatexam439 for the explanation!

To post additional questions not already addressed in this thread, feel free to use the request verbal experts' reply button.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 10 Sep 2017, 02:18
Engineer: Thermophotovoltaic generators are devices that convert heat into electricity. The process of manufacturing steel produces huge amounts of heat that currently go to waste. So if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money.

Conclusion: if steel-manufacturing plants could feed the heat they produce into thermophotovoltaic generators, they would greatly reduce their electric bills, thereby saving money.

Falsification Situation:
1. What if the cost of setting and maintaining Thermophotovoltaic generators is too high that it offsets the savings from the electricity bills?

Possible assumption:

The cost of setting and maintaining Thermophotovoltaic generators does not offset the savings from electric bills.

Which one of the following is an assumption on which the engineer’s argument depends?

(A) There are no other means of utilizing the heat produced by the steel-manufacturing process that would be more cost effective than installing thermophotovoltaic generators.
Other means are out of scope. This option cannot be an assumption.

(B) Using current technology, it would be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity.
Negate: Using current technology, it would not be possible for steel-manufacturing plants to feed the heat they produce into thermophotovoltaic generators in such a way that those generators could convert at least some of that heat into electricity
If this were the case, then the whole thing will attract more spending because the company must implement modifications. This has the potential to break the conclusion. Therefore, this option can be a possible assumption.

(C) The amount steel-manufacturing plants would save on their electric bills by feeding heat into thermophotovoltaic generators would be sufficient to cover the cost of purchasing and installing those generators.

This is in line with our possible assumptions.


(D) At least some steel-manufacturing plants rely on electricity as their primary source of energy in the steel-manufacturing process.

Negate: No some steel-manufacturing plants rely on electricity as their primary source of energy in the steel-manufacturing process.
If the electricity is not the primary source of energy for the plants, then electricity does not play a significant role in the cost thereby not saving a significant amount of money for the plants. This breaks the conclusion. This can be an assumption.


(E) There are at least some steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity.
Negate: There are no steel-manufacturing plants that could greatly reduce their electricity bills only if they used some method of converting wasted heat or other energy from the steel-manufacturing process into electricity.
This does not break the conclusion.

--
Among B, C and D, what if some in option D is 1 in 100 and what if in option B the amount of heat that is converted into electricity does not produce enough saving to offset the costs incurred by the generators? Thus, option C.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat [#permalink]

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New post 17 Sep 2017, 12:22
GMATNinjaTwo wrote:
Thanks gmatexam439 for the explanation!

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Thank you GMATNinjaTwo. Getting an appreciation from you and Sir Charles makes my day.
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Re: Engineer: Thermophotovoltaic generators are devices that convert heat   [#permalink] 17 Sep 2017, 12:22
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