==============GRE Passage============ No OAs but passages : GMAT Reading Comprehension (RC)
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==============GRE Passage============ No OAs but passages

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Director
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==============GRE Passage============ No OAs but passages [#permalink]

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New post 13 Mar 2009, 10:32
==============GRE Passage============
No OAs but passages are simple
so lets do it in timed fashion
--------------------------------
4 Qs lets take 7 mins
-------------------
Because of its accuracy in outlining the Earth’s subsurface, the seismic-reflection method remains the most important tool in the search for petroleum reserves. In field practice, a subsurface is mapped by arranging a series of wave-train sources, such as small dynamite explosions, in a grid pattern. As each source is activated, it generates a wave train that moves downward at a speed determined uniquely by the rock’s elastic characteristics. As rock interfaces are crossed, the elastic characteristics encountered generally change abruptly, which causes part of the energy to be reflected back to the surface, where it is recorded by seismic instruments. The seismic records must be processed to correct for positional differences between the source and the receiver, for unrelated wave trains, and for multiple reflections from the rock interfaces. Then the data acquired at each of the specific source locations are combined to generate a physical profile of the subsurface, which can eventually be used to select targets for drilling.

17. The passage is primarily concerned with
(A) describing an important technique
(B) discussing a new method
(C) investigating a controversial procedure
(D) announcing a significant discovery
(E) promoting a novel application

18. According to the passage, in the seismic-reflection method all of the following have a significant effect on the signal detected by the seismic instruments EXCEPT the
(A) presence of unrelated wave trains
(B) placement of the seismic instruments
(C) number of sources in the grid pattern
(D) nature of the reflectivity of the rock interfaces
(E) properties of rocks through which the wave train has traveled

19. It can be inferred from the passage that the seismic-reflection method would be likely to yield an inaccurate physical profile of the subsurface in which of the following circumstances?
(A) If the speed at which the wave train moved downward changed
(B) If the receiver were not positioned directly at the wave-train source
(C) If the rock on one side of a rock interface had similar elastic characteristics to those of the rock on the other side
(D) If the seismic records obtained for the different sources in a grid were highly similar to each other
(E) If there were no petroleum deposits beneath the area defined by the grid of wave-train sources

20. Which of the following best describes the organization of the passage?
(A) A method is criticized, and an alternative is suggested.
(B) An illustration is examined, and some errors are exposed.
(C) An assertion is made, and a procedure is outlined.
(D) A series of examples is presented, and a conclusion is drawn.
(E) A hypothesis is advanced, and supporting evidence is supplied.

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Director
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Re: RC 1-seismic-reflection method--pls participate--Easy One [#permalink]

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New post 13 Mar 2009, 11:23
My take-->ACCC
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Re: RC 1-seismic-reflection method--pls participate--Easy One [#permalink]

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New post 14 Mar 2009, 16:11
Whew! I cant see your answers unless I high light with different color.

A,C,C,C
Director
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Re: RC 1-seismic-reflection method--pls participate--Easy One [#permalink]

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New post 14 Mar 2009, 19:48
OAs are Same as Ours
Passage was Good. We get similar type of Science Passage in GMAT-the 35 Lines one.

Cheers!!
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Re: RC 1-seismic-reflection method--pls participate--Easy One [#permalink]

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New post 16 Mar 2009, 01:10
Nitya, where are today's passages?
my suggestion, as u do sometimes, pls also quote the dates onwhich they are posted in the subject line.
nitya34 wrote:
OAs are Same as Ours
Passage was Good. We get similar type of Science Passage in GMAT-the 35 Lines one.

Cheers!!
Director
Director
User avatar
Joined: 04 Jan 2008
Posts: 912
Followers: 68

Kudos [?]: 561 [0], given: 17

Re: RC 1-seismic-reflection method--pls participate--Easy One [#permalink]

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New post 16 Mar 2009, 02:21
Will follow the same :)
thanks for the advice
just imagine
3 RC means in 60 days we can reach 200 RCs...thats enough-Quality wise
:)
ritula wrote:
Nitya, where are today's passages?
my suggestion, as u do sometimes, pls also quote the dates onwhich they are posted in the subject line.
nitya34 wrote:
OAs are Same as Ours
Passage was Good. We get similar type of Science Passage in GMAT-the 35 Lines one.

Cheers!!

_________________

http://gmatclub.com/forum/math-polygons-87336.html
http://gmatclub.com/forum/competition-for-the-best-gmat-error-log-template-86232.html

Re: RC 1-seismic-reflection method--pls participate--Easy One   [#permalink] 16 Mar 2009, 02:21
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==============GRE Passage============ No OAs but passages

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