MSSC Maintenance Awareness Questions and Correct Answers

Torches are designed to avoid mixing oxygen and acetylene by using __________. Answer---- Reverse-flow check valves at torch inlets or regulator outlets To prevent leakage around the valve during use, __________ Answer---- An oxygen cylinder valve should be opened all the way An explosion can occur if __________ comes in contact with oil. Answer---- High pressure oxygen A green welding hose normally indicates that this hose carries __________. Answer---- Oxygen A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. Answer---- dye-penetrant test A red welding hose indicates that this hose carries __________. Answer---- acetylene When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the direction of travel. Answer---- pull technique __________ metal is a metal similar in composition to the metal being joined. It strengthens the weld by filling the gap created between the two pieces of metal during welding. Answer---- Filler Metals treated by __________ processes become soft. Answer---- annealing Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas Metallic Arc Welding or Gas Tungsten Arc Welding. Answer---- electricity A magnaflux test is used to show what flaw in ferrous metal? Answer---- Cracks in the surface A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. Answer---- stationary arm What device should be stored a minimum of 20 feet from flammable materials? Answer---- Oxygen Cylinders The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the base metal being welded. Answer---- Electricity Circuit testers determine if __________ el