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Fuels Used in Internal Combustion Engines
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Fuels Used in Internal Combustion Engines

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Questions and Answers

What happens to the fuel in liquid form when it is drawn or injected into the engine cylinder?

  • It expands
  • It vaporizes (correct)
  • It dissolves
  • It solidifies
  • In light fuel oil engines, what is the governing method for the air/fuel mixture?

  • Compression ignition
  • Injection
  • Throttling (correct)
  • Vaporizing
  • What type of engines use heavy oil with higher viscosity and specific gravity?

  • Four-stroke engines
  • High compression engines (correct)
  • Two-stroke engines
  • Low compression engines
  • What causes the fuel to ignite in a compression ignition engine?

    <p>High temperature developed during compression</p> Signup and view all the answers

    How is the output of a compression ignition engine governed?

    <p>By varying the fuel quantity injected</p> Signup and view all the answers

    Which fuel is generally considered an environmentally clean alternative to other hydrocarbon fuels?

    <p>Natural gas</p> Signup and view all the answers

    What is the measure of the fuel's resistance to premature detonation which causes engine knock?

    <p>Octane rating</p> Signup and view all the answers

    What enhances gasoline to increase the octane rating?

    <p>Iso octanes</p> Signup and view all the answers

    What caused propane's use to drop for a while?

    <p>Rising fuel prices and emission control modules issues</p> Signup and view all the answers

    Where is compressed methane extracted from natural gas usually stored for use in mobile engines?

    <p>Cylinders</p> Signup and view all the answers

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