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The most vexing problem faced by researchers exploring wind-powered generation of electricity is achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload electrical grids with sudden voltage increases.
(A) achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload
(B) achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
(C) how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
(D) how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
(E) how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
(A) achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload
(B) achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
(C) how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
(D) how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
(E) how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
20 Mar 2021, 10:36
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shenwenlim
GMATNinja - can you please explain your thought process for this question?
Quote:
(A) The most vexing problem faced by researchers exploring wind-powered generation of electricity is achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload electrical grids with sudden voltage increases.
Wait, why would achieving a constant flow of power be a vexing a problem? That sounds like a good thing. The problem is figuring out how to achieve a constant flow of power.So (A) is illogical, and we can eliminate it.
Quote:
(B) achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
Same problem as (A). (B) is out.Quote:
(C) how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
This looks better. Now the problem is how to achieve the constant flow of power, so the meaning is logical. I don't see any other glaring issues, so let's hold on to (C).
Quote:
(D) how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
The "but" doesn't make sense the way it's used here. Notice that in (C) we have a legitimate contrast: we have a flow that meets demand (good) but does not overload electrical grids (bad). In (D), the piece that precedes "but" is "a constant flow of power from an unpredictable source" (good), and the piece after is "a flow that meets demand" (also good).
Because we don't have a proper contrast, the use of "but" is illogical. (D) is out.
Quote:
(E) how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
Two issues here. First, the subject "constant flow" is now separated from the passive verb phrase "be achieved" in a way that makes the sentence more difficult to understand. Not wrong, necessarily, but a definite downgrade from (C). Worse, it's not clear what "which" should refer to. Is it the "natural source" that meets demand or is it the "constant flow of power?" If you wrestle with it, you can probably figure out what's going on, but it's definitely not as clear as (C).
Because (C) corrects the initial meaning issue without introducing any other problems, it's our winner.
08 Aug 2018, 20:00
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arvindsiv
The most vexing problem faced by researchers exploring wind-powered generation of electricity is achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload electrical grids with sudden voltage increases.
A. achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload
B. achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
C. how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
D. how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
E. how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
A. achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload
B. achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
C. how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
D. how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
E. how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
(A) achieving a constant flow of power from an unpredictable natural source that meets demand, but so the flow does not overload
Explanation -> here the intended meaning is not conveyed correctly.
Here we want to convey that researchers face a vexing problem of Achieving Constant Flow of Power to meet demand of the people.
But what the sentence conveys is the natural source lacking in helping people meeting their demand of electricity.
Also the construction but so is a little vague.
(B) achieving a constant flow of power from an unpredictable natural source, which meets demand but without overloading
Explanation -> which seems to modify 'source' but it should modify 'flow'. Hence option can be ruled out.
(C) how to achieve a constant flow of power from an unpredictable natural source, a flow that meets demand but does not overload
Explanation -> Conveys the meaning correctly. Hence seems to be the best option here.
(D) how to achieve a constant flow of power from an unpredictable natural source, but a flow that meets demand without overloading
Explanation -> Here the 'but' changes the intended meaning. If we see below -
how to achieve a constant flow of power
A very awkward construction is created that distorts the original meaning.
(E) how a constant flow of power from an unpredictable natural source can be achieved, which meets demand but does not overload
Explanation -> Here 'which' should modify 'flow', but it is not doing the same. Hence Incorrect
