MSSC exam 2023 with complete solutions - 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