9074/303 pp 7 Natural Gas Quiz

What is the chemical formula for methane?

• CO₂

• CH₄

• C₂H₆

• C₃H₈

What is the percentage of carbon dioxide in natural gas?

• 0.6%

• 1.0%

• 2.7%

• 5.3%

Which of the following is a component of natural gas?

• Oxygen

• Helium

• Nitrogen

• Argon

What percentage of natural gas is constituted by Methane?

• 70%

• 80%

• 90%

• 100%

What happens to the oxygen levels in incomplete combustion compared to complete combustion?

• Oxygen levels increase

• Oxygen levels decrease

• Oxygen levels remain the same

• Oxygen is not required

What is the main product of incomplete combustion that is not produced in complete combustion?

• CO₂

• CO

• H₂O

• O₂

What is the role of oxygen in the combustion of gases?

• It acts as a fuel

• It is a byproduct

• It is a reactant

• It is not involved

What is a sign of insufficient gas pressure in an appliance?

• A strong blue flame

• A loose floppy flame

• A steady yellow flame

• A flickering red flame

How many main types of flame are relevant to the combustion process?

• One

• Two

• Three

• Four

Diagram showing a luminous flame with combustion air and gas flow

• Diagram showing a non-luminous flame with no combustion air

• Diagram showing a luminous flame with no gas flow

• Diagram showing a non-luminous flame with combustion air and gas flow

• Diagram showing a luminous flame with combustion air and gas flow