Flame Temperatures

A carburizing/reducing flame has ______ oxygen.

• more

• less

An oxidizing flame has _______ oxygen.

• more

• less

True or False? The three things needed for a combustion reaction (fire triangle) consists of fuel, heat, and oxygen.

• True

• False

Which color indicates the hottest flames?

• Yellow

• Orange

• Blue

• Red

True or False? Orange/yellow flames indicate the presence of unburned oxygen compounds.

• True

• False

Fuel such as _______ will burn with a blue flame due to all the carbon being burned.

• gases (like propane or butane)

• wood

Which describes a neutral flame?

• More oxygen then fuel

• Less oxygen then fuel

• A balanced amount of oxygen and fuel

This type of flame tends to introduce carbon soot into molten metal.

• Neutral

• Reducing

• Oxidizing

This type of flame has the highest temperature due to high levels of oxygen.

• Carburizing

• Oxidizing

• Neutral

This type of flame can release carbon monoxide, a toxic gas.

• Carburizing

• Neutral

• Reducing