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Central Ideas & Details Practice Test

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Q1

Read the following text, then answer the question:

In 1909, engineer Isabel Hart began keeping a notebook about the city’s streetlights, not because she admired their glow but because she suspected wasted fuel. She compared lamp logs from January and July and found that the summer lights were often lit long after sunrise. Although a supervisor blamed “faulty clocks,” Hart traced the pattern to a rule that required lamplighters to follow printed schedules that were updated only twice a year. Her proposal was simple: allow weekly adjustments based on actual dawn times, and the city reported lower fuel purchases the next quarter.

Which choice best states the main idea of the text?

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