Carbonizing Flames Quiz

What does the carbonizing oxyacetylene flame show at the end of the cone?

• A feather

• A spark

• A blue tip

• A red glow

What does the amount of feather in a carbonizing flame indicate?

• Amount of excess oxygen

• Amount of excess acetylene

• Amount of heat

• Amount of light

What is the effect of a carbonizing flame on metal?

• Decreases tensile strength

• Increases ductility

• Increases tensile strength

• Decreases carbon content

In the X system of carbonizing flames, what does a 3X flame indicate?

• Feather is three times the length of the neutral cone

• Feather is equal to the length of the neutral cone

• Feather is half the length of the neutral cone

• Feather is one-third the length of the neutral cone

What is a carbonizing flame used for?

• Fusion welding of alloy steels

• Cutting stainless steel

• Soldering copper pipes

• Melting aluminum

At what point does a neutral flame occur?

• When the feather just disappears

• When the flame turns blue

• When the flame is the hottest

• When the flame is the largest

What is the temperature of the neutral flame in Section A?

• 3090°C (5600°F)

• 2093°C (3800°F)

• 1260°C (2300°F)

• 1500°C (2732°F)

Which section of the flame is recommended for low temperature brazing using silver brazing alloys?

• Section C

• Section A

• Section B

• Section D

What is a neutral flame used for?

• Fusion welding of mild steels

• Searing of ground surfaces on cast iron

• Fusion welding of brass and bronze

• Brazing of copper and galvanized iron

What is an oxidizing flame known for?

• Excess acetylene

• Richer in oxygen

• Neutral balance

• Low temperature