MSSC MAINTENANCE AWARENESS PRACTICE TEST WITH VERIFIED CORRECT ANSWERS 2023.

Metals that contain iron, such as steel, have _____________ properties. magnetic ________________ 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 The gas metal arc welding (GMAW) process uses ______________ to melt metal wire and fuse it with the base metal being welded. electricity Metals that contain iron, such as mild steel, are called ____________ metals. ferrous A spot welding system consists of an electrical supply, moveable arm, and a(n) _______________. stationary arm 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 Metals that contain iron, such as steel are called _____________ metals. ferrous A green welding hose indicated that this hose carries __________. Oxygen Torches are designed to avoid mixing oxygen and acetylene by using ________________. Reverse-flow check valves at torch inlets or regulator outlets An explosion can occur if ___________ comes into contact with oil. High pressure oxygen A Magnaflux test is used to show what flaw in ferrous metal? Cracks in the surface When using the ____________ in welding, the electrode should be leaned 15 to 25 degrees in the direction of travel. pull technique the maximum pressure for use of acetylene gas is _______ psi. 15 A red welding hose indicates that this hose carries __________. Acetylene A(n) ___________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. dye-penetrant test To prevent leakage around the valve during use, _____________. An oxygen cylinder valve should be opened all the way What device should be stored a minimum of 20 feet from flammable materials? Oxygen Cylinders 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 valve should be cracked open slightly and then closed completely The component of an electrical circuit that gives the operator control is the __________. input device Electricity creates the flow of __________ in a conductor. electrons Constant voltage power supplies will maintain a constant voltage under varying __________. loads The primary purpose of a switch is to __________. energize and deenergize circuits A knife switch consists of a lever and one or more sets of __________. contacts Circuit testers determine if __________ electricity is present. AC Which of the following is true of an electrical schematic diagram? All of the above The type of current that only flows in one direction is __________. DC Which of the following is often used to start or stop machine operation? Pushbutton switch Which of the following is an electrical output device? All of the above (motor, lamp, resistor) The contacts of which switch type are open when acted on by the operator? Normally closed Rotary motion is the output of which electrical output device? Motor As branches are added to a parallel circuit the resistance __________. decreases A multimeter is a multipurpose device that can measure __________. voltage, current, and resistance An ammeter is used to measure __________. current To measure current through a component, the ammeter must be connected __________ the component. in series with Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit? Make sure the power supply is on. Voltage is a(n) electrical __________. force 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) __________ is used to measure resistance. ohmmeter Current in a __________ circuit is divided among the branches of the circuit. parallel If a wire has continuity, it __________. will have almost no resistance What is the unit of measurement for resistance? Ohms The two ways to measure voltage are __________ and __________. across a component, from a reference Both analog and digital voltmeters measure __________. potential difference