Steam Engine · World History

What is the function of the 'piston' within a steam engine?

  1. To burn the coal for energy
  2. To store the excess steam for later use
  3. To move back and forth under the pressure of steam
  4. To remove and filter out any impurities from the boiler water
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Correct answer: To move back and forth under the pressure of steam

The piston is the core component that captures the energy of expanding steam. The pressure forces the piston through a cylinder, and this motion is then transferred via rods and gears to do useful work.

Difficulty: Medium Question 14 of 20

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