Read the passage below and then choose the best answer to each question. Answer the questions on the basis of what is stated or implied in the passage.
Passage
Today's ubiquitous red-yellow-green electric traffic light, familiar to drivers worldwide, had its origins in train signals from the 1800s. These early signals all used red to signify "stop," but the choice and arrangement of the other two colors would surprise today's drivers: green was the color for "caution," and white was the color for "go." However, white proved to be a poor choice, because the red and green lights train engineers saw were produced by red and green filters covering white light bulbs (the "go" light had a clear filter). If a filter was broken or missing, the signal would appear as white and engineers might mistake "stop" or "caution" for "go," especially at night.
What does the passage suggest about the light bulbs used in the first train signaling systems?
- A. They were very fragile.
- B. They were all the same color.
- C. They were only illuminated at night.
- D. They were also used to signal automobile drivers.
Correct Answer & Rationale
Correct Answer: B
The passage indicates that the light bulbs in the first train signaling systems were designed to emit a specific color to convey signals, suggesting uniformity in color for clarity and safety. Option A is incorrect as the passage does not mention the fragility of the bulbs. Option C is misleading; while the bulbs may have been primarily used at night, the passage does not explicitly state that they were only illuminated then. Option D is also incorrect; the passage focuses on train signaling without reference to their use for automobile drivers. Thus, the emphasis on color highlights the importance of consistent signaling in train operations.
The passage indicates that the light bulbs in the first train signaling systems were designed to emit a specific color to convey signals, suggesting uniformity in color for clarity and safety. Option A is incorrect as the passage does not mention the fragility of the bulbs. Option C is misleading; while the bulbs may have been primarily used at night, the passage does not explicitly state that they were only illuminated then. Option D is also incorrect; the passage focuses on train signaling without reference to their use for automobile drivers. Thus, the emphasis on color highlights the importance of consistent signaling in train operations.
Other Related Questions
Which is the best version of the underlined portion of sentence 3 (reproduced below)? High-tech teams around the world are working on projects designed to enhance people's telepresence "their sense of physically being in a location even when they are actually thousands of miles away.
- A. (as it is now)
- B. telepresence', their
- C. telepresence.' Their
- D. telepresence' their
Correct Answer & Rationale
Correct Answer: A
Option A maintains the original structure and punctuation, effectively conveying the intended meaning without introducing errors. The phrase "telepresence" is correctly followed by a quotation mark, and the sentence flows logically. Option B incorrectly uses a comma instead of a period after "telepresence," which disrupts the sentence's clarity and structure. Option C improperly replaces the comma with a period, creating a fragment because "Their sense..." would then be a standalone sentence without proper connection to the previous thought. Option D lacks the necessary punctuation to separate the two ideas, resulting in a confusing and grammatically incorrect construction.
Option A maintains the original structure and punctuation, effectively conveying the intended meaning without introducing errors. The phrase "telepresence" is correctly followed by a quotation mark, and the sentence flows logically. Option B incorrectly uses a comma instead of a period after "telepresence," which disrupts the sentence's clarity and structure. Option C improperly replaces the comma with a period, creating a fragment because "Their sense..." would then be a standalone sentence without proper connection to the previous thought. Option D lacks the necessary punctuation to separate the two ideas, resulting in a confusing and grammatically incorrect construction.
We can infer that the reason the glass tubes were bent was that
- A. the Paris Exposition display was considered unsatisfactory
- B. straight tubes are not as bright as bent ones
- C. it is difficult to form letters with straight tubes
- D. neon gas burns out quickly in straight tubes
Correct Answer & Rationale
Correct Answer: C
The bending of glass tubes is primarily linked to the ability to form letters and shapes, making option C the most logical choice. Bent tubes allow for the creation of recognizable letters, essential for signage. Option A suggests the display's quality influenced the design, but it lacks direct relevance to the functionality of the tubes. Option B implies that brightness is affected by the shape of the tubes, which is misleading; brightness is more about gas type and tube diameter than shape. Option D inaccurately claims that neon gas burns out quickly in straight tubes; gas longevity is not dependent on tube shape but rather on electrical conditions and gas quality.
The bending of glass tubes is primarily linked to the ability to form letters and shapes, making option C the most logical choice. Bent tubes allow for the creation of recognizable letters, essential for signage. Option A suggests the display's quality influenced the design, but it lacks direct relevance to the functionality of the tubes. Option B implies that brightness is affected by the shape of the tubes, which is misleading; brightness is more about gas type and tube diameter than shape. Option D inaccurately claims that neon gas burns out quickly in straight tubes; gas longevity is not dependent on tube shape but rather on electrical conditions and gas quality.
The author includes and defines the words "gargouille" and "gurgulio" primarily to
- A. describe the physical appearance of gargoyles
- B. connect the name and function of gargoyles
- C. establish the geographical origin of gargoyles
- D. suggest the artistic and cultural value of gargoyles
Correct Answer & Rationale
Correct Answer: B
The inclusion and definition of "gargouille" and "gurgulio" serve to connect the names of these figures with their function as water spouts, emphasizing their practical purpose in architecture. Option A is incorrect as the definitions focus more on the names rather than physical descriptions. Option C is not supported, as the terms do not specifically indicate geographical origins but rather their meanings. Option D suggests a focus on artistic value, which is not the primary intent of defining these terms; the emphasis is on their functional role rather than their cultural significance.
The inclusion and definition of "gargouille" and "gurgulio" serve to connect the names of these figures with their function as water spouts, emphasizing their practical purpose in architecture. Option A is incorrect as the definitions focus more on the names rather than physical descriptions. Option C is not supported, as the terms do not specifically indicate geographical origins but rather their meanings. Option D suggests a focus on artistic value, which is not the primary intent of defining these terms; the emphasis is on their functional role rather than their cultural significance.
In 1952, Dwight Eisenhower was elected President of the United States, he won 55% of the vote.
- A. he won
- B. he had won
- C. with winning
- D. winning
Correct Answer & Rationale
Correct Answer: D
The phrase "winning" effectively conveys the action of Eisenhower's election in a succinct manner, emphasizing the achievement without the need for auxiliary verbs. Option A, "he won," is grammatically correct but less fluid in this context. It shifts focus to a completed action rather than the ongoing significance of his victory. Option B, "he had won," uses the past perfect tense, which implies a prior context that isn’t necessary here and complicates the sentence unnecessarily. Option C, "with winning," introduces an awkward prepositional phrase that detracts from the clarity and directness of the statement.
The phrase "winning" effectively conveys the action of Eisenhower's election in a succinct manner, emphasizing the achievement without the need for auxiliary verbs. Option A, "he won," is grammatically correct but less fluid in this context. It shifts focus to a completed action rather than the ongoing significance of his victory. Option B, "he had won," uses the past perfect tense, which implies a prior context that isn’t necessary here and complicates the sentence unnecessarily. Option C, "with winning," introduces an awkward prepositional phrase that detracts from the clarity and directness of the statement.