Natural Gas Properties and Combustion Quiz
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Questions and Answers

Which of the following is true about natural gas combustion characteristics?

  • Natural gas requires high amounts of excess air for complete combustion.
  • Natural gas has a high ash content.
  • Natural gas is not suitable for steam generation purposes.
  • Natural gas combusts readily with air, resulting in complete combustion. (correct)

    • Which of the following gases is typically removed during the treatment of natural gas?

  • Hydrogen sulfide
  • Methane
  • Carbon dioxide
  • Nitrogen (correct)

    • What is the typical range of heating value for natural gas expressed in terms of mass?

  • 46,420 to 55,700 kJ/kg
  • 55,700 to 46,420 J/kg
  • 55,700 to 46,420 kJ/kg
  • 46,420 to 55,700 J/kg (correct)

    • According to the given information, what is the stoichiometric volume of oxygen required for complete combustion of 1 m3 of methane?

    <p>9.52 m3</p> Signup and view all the answers

    What is the volume of air flow supplied in the given example of a boiler burning 50 m3/h of methane gas at 10% excess air?

    <p>523.6 m3/h</p> Signup and view all the answers

    How much volume of nitrogen is present in the 50 m3/h of air flow supplied in the given example of a boiler burning methane gas at 10% excess air?

    <p>7.52 m3/h</p> Signup and view all the answers

    According to the text, which of the following is an advantage of natural gas as a fuel?

    <p>It is clean burning with no ash produced</p> Signup and view all the answers

    According to the text, which of the following is a disadvantage of natural gas as a fuel?

    <p>It is more expensive than solid and liquid fuels</p> Signup and view all the answers

    According to the text, what is the mass of air containing 4 kg of oxygen?

    <p>17.24 kg</p> Signup and view all the answers

    According to the text, what is the air-fuel ratio if the excess air is 15% for a boiler fired on natural gas?

    <p>19.83 kg air/kg fuel</p> Signup and view all the answers

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