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Difficulty: MediumTechnological Innovations of the First and Second Industrial Revolutions

"The introduction of electric street lighting in our cities has not only extended the hours of industrial labor and social activity, but has also vastly improved public safety. The massive generators operating at the central station now provide a constant current, replacing the older, localized gas lamps that required manual ignition and constant coal-gas supply."

— Adapted from a British trade journal, 1891

Which of the following technological innovations of the Second Industrial Revolution most directly enabled the transition described in the passage?

  1. The development of the dynamo and electrical grids to transmit power from a centralized sourceAnswer
  2. B
    The invention of the steam engine to transmit mechanical energy directly to localized factory machinery
  3. C
    The adaptation of the internal combustion engine to run on refined petroleum for individual street lamps
  4. D
    The refinement of coal-gas extraction methods to supply municipal pipelines

Answer

The development of the dynamo and electrical grids to transmit power from a centralized source
The correct answer is correct because the invention of the dynamo (electrical generator) and the engineering of electrical grids allowed electricity to be generated at a centralized location and distributed efficiently across urban centers, replacing localized fossil-fuel combustion systems like coal-gas lamps.

Step-by-Step Solution

1
Analyze the stimulus to identify the technology described.
The stimulus describes the transition from older coal-gas street lighting to modern electric street lighting powered by generators at a central station.
Understanding the context of the source is necessary to identify which phase of industrialization is being discussed.
2
Distinguish between the innovations of the First and Second Industrial Revolutions.
First Industrial Revolution technologies relied on coal, steam, and localized mechanical transmission. Second Industrial Revolution technologies relied on electricity, steel, chemicals, and petroleum.
This allows for the elimination of options representing the first phase of industrialization.
3
Select the option that matches the Second Industrial Revolution technology enabling centralized electrical generation and distribution.
The dynamo (generator) and electrical grids enabled central power stations to distribute electricity over distances.
This directly matches the transition to central station generators described in the passage.

Key Concept

Technological Innovations of the First and Second Industrial Revolutions
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Topics

Technological Innovations of the First and Second Industrial Revolutions

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