Block 3: Oxyacetylene Welding (with Accurate Answers)

What is oxy-fuel welding defined as? correct answers Uses oxygen combined with a fuel to sustain a flame that generates the heat necessary for welding What are the fuel gases? correct answers Acetylene, MAPP, Propane and natural gas What is used to control and direct the heat on the edges of the metal to be joined? correct answers Torch The flame acts as a blanket that protects the weld from what? correct answers Atmospheric contamination What's the purpose of filler metal? (Filler rod) correct answers Fills the weld joint and provides weld reinforcement When does fusion occur? correct answers When the molten base metal and the added filler metal melt and blend together Silver brazing is defined as what? correct answers A non-standard term for brazing with silver base filler metal A welding process that uses filler metal with liquids above 840*F and below the solidus of base metal correct answers Braze welding The welding process that uses a mixture of fuel gas and oxygen is known as what? correct answers Oxyacetylene welding What is oxygen used for in welding? correct answers Acts as an accelerant for the fuel gas and enables the acetylene to reach the higher temps tires needed for welding and cutting What are oxygen cylinders charged to and at what temperature? correct answers 2200 psi/ 70*F What does a safety nut do? correct answers Allows gas to drain slowly out of the top of the cylinder should it overheat or be put under any mechanical issue? What color is acetylene? And what does it smell like? correct answers It does not have one, it is a colorless has with a very distinctive nauseating odor When does acetylene become unstable? correct answers When compressed to more than 15 psi Is a chemical liquid that dissolved or absorbs large quantities of acetylene under pressures greater than 15 psi without changing the nature of the gas correct answers Acetone _________ located on the bottom of the cylinder to relieve any excess pressure if the cylinder overheats and on the neck is the cylinder valve correct answers Fusible plug