Important Engine Characteristics
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Questions and Answers

What does engine performance indicate?

  • The engine's installation requirements
  • The engine's initial cost
  • The engine's noise level
  • The engine's success in converting fuel energy into mechanical work (correct)

    • What does the performance of an engine depend on?

  • The engine's air pollutant emissions
  • The inter-relationship between power, speed, and specific fuel consumption (correct)
  • The engine's initial cost
  • The engine's noise level

    • What is the purpose of a speed governor in some engines?

  • To reduce the engine's fuel consumption
  • To increase the engine's noise level
  • To vary the engine's power output
  • To fix the engine at a specific speed (correct)

    • Where does an internal combustion engine generally operate within?

    <p>Useful range of speed</p> Signup and view all the answers

    What varies at each speed within the useful range of an engine?

    <p>Power output</p> Signup and view all the answers

    How is the maximum usable power output of an engine described?

    <p>Variable with each speed within the useful range</p> Signup and view all the answers

    What is the ratio of power developed to the maximum usable power at the same speed called?

    <p>Load capacity</p> Signup and view all the answers

    Which term refers to the highest power an engine can develop for short periods of operation?

    <p>Absolute rated power</p> Signup and view all the answers

    What is used to judge an engine's performance by quantifying its efficiencies?

    <p>Mean effective pressure</p> Signup and view all the answers

    Which term represents the energy flow through the engine expressed in 3 distinct terms?

    <p>Indicated Power</p> Signup and view all the answers

    What does Volumetric Efficiency (ηv) measure in an engine?

    <p>Power output per unit mass</p> Signup and view all the answers

    What is the ratio of fuel-air or air-fuel called in an engine?

    <p>Specific fuel consumption</p> Signup and view all the answers

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