1) What is complete combustion? a) Burning with oxygen b) Burning without air c) Burning with water d) Burning with nitrogen 2) What is produced in complete combustion? a) Carbon monoxide b) Carbon dioxide c) Soot d) Methane 3) What is incomplete combustion? a) Burning with limited oxygen b) Burning with excess air c) Burning with hydrogen d) Burning with helium 4) What is a product of incomplete combustion? a) Water b) Carbon dioxide c) Carbon monoxide d) Oxygen 5) Which gas is a pollutant from incomplete combustion? a) Helium b) Nitrogen c) Oxygen d) Carbon monoxide 6) What is a sign of incomplete combustion? a) Soot formation b) Clear flame c) No smoke d) Blue flame 7) What color flame indicates complete combustion? a) Orange b) Blue c) Red d) Green 8) Which is more efficient, complete or incomplete combustion? a) Neither b) Incomplete combustion c) Complete combustion d) Both equally 9) What is a danger of incomplete combustion? a) Toxic gases b) More energy c) Less pollution d) No heat 10) What is NOT part of the fire triangle? a) Fuel b) Carbon Dioxide c) Heat d) Oxygen

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