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MSSC - Maintenance Awareness

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MSSC - Maintenance Awareness Torches are designed to avoid mixing oxygen and acetylene by using __________. - ✔✔Reverse-flow check valves at torch inlets or regulator outlets To prevent leakage around the valve during use, __________ - ✔✔An oxygen cylinder valve should be opened all the way An explosion can occur if __________ comes in contact with oil. - ✔✔High pressure oxygen A green welding hose normally indicates that this hose carries __________. - ✔✔Oxygen A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. - ✔✔dye-penetrant test A red welding hose indicates that this hose carries __________. - ✔✔acetylene When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the direction of travel. - ✔✔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. - ✔✔Filler Metals treated by __________ processes become soft. - ✔✔annealing Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas Metallic Arc Welding or Gas Tungsten Arc Welding. - ✔✔electricity A magnaflux test is used to show what flaw in ferrous metal? - ✔✔Cracks in the surface A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. - ✔✔stationary arm What device should be stored a minimum of 20 feet from flammable materials? - ✔✔Oxygen Cylinders The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the base metal being welded. - ✔✔Electricity Circuit testers determine if __________ electricity is present. - ✔✔AC A knife switch consists of a lever and one or more sets of __________. - ✔✔contacts The component of an electrical circuit that gives the operator control is the __________. - ✔✔input device The type of current that only flows in one direction is __________. - ✔✔DC Constant voltage power supplies will maintain a constant voltage under varying __________. - ✔✔loads 10mA would be an example of __________ value. - ✔✔current A(n) __________ is used to measure resistance. - ✔✔ohmmeter Voltage is a(an) electrical __________. - ✔✔force If a wire has continuity, it__________. - ✔✔will have almost no resistance Current in a __________ circuit is divided among the branches of the circuit. - ✔✔parallel As branches are added to a parallel circuit the resistance __________. - ✔✔decreases A multimeter is a multipurpose device that can measure _________. - ✔✔voltage, current, and resistance In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is __________. - ✔✔equal to the power supply voltage A(n) __________ circuit is one in which there is more than one path for current to travel. - ✔✔parallel An ammeter is used to measure __________. - ✔✔current The two ways to measure voltage are __________ and __________. - ✔✔across a component, from a reference Both analog and digital voltmeters measure __________. - ✔✔potential difference When current in a circuit is too high, it is usually the result of too many loads or a __________. - ✔✔short circuit Electrical wiring that runs in exposed locations must be protected by pipe or tubing called __________. - ✔✔conduit The total power in _________

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