MSSC-M4 Maintenance Awareness Practice Questions and Verified Answers

MSSC-M4 Maintenance Awareness Practice Questions and Verified Answers __________ 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. - Joiner - Filler - Wadding - Lap Filler Metals that contain iron, such as mild steel, are called __________ metals. - Soft - Heavy - Base - Ferrous Ferrous A green welding hose normally indicates that this hose carries __________ .- Acetylene - Oxygen - Helium - Nitrogen Oxygen Oxy-acetylene welding requires no __________. - Gas - Torch - Electricity - Filler rod Electricity Metals treated by __________ processes become soft. - Annealing - Quenching - Stamping - Twisting Annealing Dirt and other foreign material should be cleaned out of an oxygen cylinder before installing a regulator. By what method should this be done? - The cylinder should be wiped out with a rag - The cylinder valve should be cracked open slightly and then closed completely - Using a pneumatic air gun - Using a wire brush The cylinder valve should be cracked open slightly and then closed completely What device should be stored a minimum of 20 feet from flammable materials? - Nitrogen Cylinders - Micrometers - Machine Tools - Oxygen Cylinders - Oxygen Cylinders The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the base metal being welded. - Electricity - Oxygen - Acetylene - Tungsten Electricity Metals that contain iron, such as steel, have __________ properties. - Porous - Magnetic - Spongy - Kinetic Magnetic A magnaflux test is used to show what flaw in ferrous metal? - Flatness - Hardness - Cracks in the surface - Magnetism Cracks in the surface Metals that contain iron, such as steel are called __________ metals .- Ferrous - Soft - Base - Heavy Ferrous Torches are designed to avoid mixing oxygen and acetylene by using __________. - Reverse-flow check valves at torch inlets or regulator outlets - Separate valves - Lower oxygen pressure - Torch anti-mixing valve Reverse-flow check valves at torch inlets or regulator outlets An explosion can occur if __________ comes in contact with oil. - High pressure oxygen - High pressure nitrogen - High speed shaft - High speed pump High pressure oxygen A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. - Encoder - Filler rod - Stationary arm - Stationary roller Stationary arm To prevent leakage around the valve during use, __________. - Acetylene pressure should be equalized - A full flow of oxygen should be established - An oxygen cylinder valve should be opened all the way - Reduce condensation in the regulator An oxygen cylinder valve should be opened all the way A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. - Dye-penetrant test - Magnaflux test - Bend test - X-ray test Dye-penetrant test The maximum pressure for use of acetylene gas is __________ psi. - 30 - 25 - 20 - 15 15 A red welding hose indicates that this hose carries __________. - Oxygen - Acetylene - Argon - Nitrogen Acetylene