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30 down from a summit passes through many such layers

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(30) down from a summit passes through many such layers, a surveyor could sight a mirage rather than the peak itself. To reduce refraction errors, the Chinese team carried in sea level to (35) within five to twelve miles of Everest’s summit, decreasing the amount of air that light passed through on its way to
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their theodolites. The Chinese also launched weather balloons near their (40) theodolites to measure atmospheric temperature and pressure changes to better estimate refraction errors. Another hurdle is the peak’s shape. When surveyors sight the summit. (45) there is a risk they might not all measure the same point. In 1975 the Chinese installed the first survey beacon on Everest, a red reflector visible through a theodolite for ten (50) miles, as a reference point. One more source of error is the uneven- ness of sea level. The British assumed that carrying in sea level would extend an imaginary line from (55) the shore along Earth’s curve to a point beneath the Himalaya. In reality, sea level varies according to the irregular interior of the planet. The Chinese used a gravity meter to correct for local deviations in sea level. ------------------------------------------------------------------------------------------------------- Q32 It can be inferred from the passage that refraction would be most likely to cause errors in measurements of a mountain’s elevation under which of the following conditions? A. When there are local variations in sea level B. When light passes through humid air C. When theodolites are used relatively far from the mountain peak. D. When weather balloons indicate low air temperature and pressure. E. When sea level has been carried in to Within five to twelve miles of the summit. Answer: ------------------------------------------------------------------------------------------------------- Q33 Which of the following best describes the purpose of the sentence in lines 23-25
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(“The Chinese…the British”)? A. Introduce a definition B. Signal a transition in focus C. Summarize the preceding paragraph D. Draw a contrast between two different theories. E. Present information that contradicts the Preceding paragraph. Answer: ------------------------------------------------------------------------------------------------------- Q34 Which of the following is NOT mentioned as a possible source of error in surveying mountain elevation? A. Mirages B. Refraction C. Inaccurate instruments D. Variations in sea level E. Uncertainty about the exact point to be Measured Answer: ------------------------------------------------------------------------------------------------------- Q35 The primary purpose of the passage is to A. provide details about improvements to a process B. challenge the assumptions underlying a new method C. criticize the way in which a failed project was carried out D. call for new methods to solve an existing problem E. explain the theory behind a new technique answer: ------------------------------------------------------------------------------------------------------- Q36 Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe. A. that a black hole lies at the center of the Milky Way and of B. that a black hole lies at the Milky Way’s center and C. that there is a black hole lying at the Milky Way’s
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center an D.
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