MSSC-M4 MAINTENANCE AWARENESS WITH 100% CORRECT 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 When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the direction of travel. - Push technique - Pull technique - Spot technique - Stringer technique Pull technique Which of the following is true of an electrical schematic diagram? - Represents components with standard symbols. - Shows how the components are interconnected. - Is helpful in troubleshooting a circuit. - All of the above All of the above Electricity creates the flow of __________ in a conductor. - Protons - Neutrons - Electrons - Photons Electrons Constant voltage power supplies will maintain a constant voltage under varying __________ .- Loads - Weather conditions - Levels of light - Chemical reactions Loads The component of an electrical circuit that gives the operator control is the __________. Conductor - Power supply - Output device - Input device Input device The type of current that only flows in one direction is __________. - AC - DC - CA - PC DC Rotary motion is the output of which electrical output device? - Buzzer - Resistor - Motor - Solenoid Motor Which of the following is an electrical output device? - Motor - Lamp - Resistor - All of the above All of the above The contacts of which switch type are open when acted on by the operator? - Normally closed - Normally activated - Normally open - Normally simulated Normally closed Which of the following is often used to start or stop machine operation? - Pushbutton switch - Selector switch - Knife switch - None of the above Pushbutton switch Circuit testers determine if __________ electricity is present. - AC - IC - PC - RF AC The primary purpose of a switch is to __________. - Control current values - Reduce voltage levels - Energize and deenergize circuits - Act as output devices Energize and deenergize circuits A knife switch consists of a lever and one or more sets of __________. - Conductors - Operators - Knives - Contacts Contacts As branches are added to a parallel circuit the resistance __________. - Decreases - Increases - Does not change - Reverses Decreases Current in a __________ circuit is divided among the branches of the circuit. - Series - Parallel - Open - Short Parallel In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is __________. - Equal to the power supply voltage - More than the power supply voltage - Less than the power supply voltage - More or less, depending on the load of each branch Equal to the power supply voltage Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit? - Turn off the power supply. - Disconnect one of the component leads from the circuit. - Make sure the power supply is on. - Connect the leads across the component. Make sure the power supply is on A(n) __________ is used to measure resistance. - Ohmmeter - Ammeter - Voltmeter - Flow meter Ohmmeter The two ways to measure voltage are __________ and __________. - In series, in parallel - Additive, subtractive - High points, low points - Across a component, from a reference Across a component, from a reference An ammeter is used to measure __________. - Current - Resistance - Voltage - Temperature Current A(n) __________ circuit is one in which there is more than one path for current to travel. - Open - Series - Parallel - Closed Parallel To measure current through a component, the ammeter must be connected __________ the component. - Across - In parallel with - In series with - Without In series with What is the unit of measurement for resistance? - Volts - Watts - Ohms - Amps Ohms A multimeter is a multipurpose device that can measure __________. - Only voltage - Only current - Only resistance - Voltage, current, and resistance Voltage, current, and resistance Both analog and digital voltmeters measure __________. - Electrical flow - Potential resistance - Potential difference - Power Potential difference Voltage is a(n) electrical __________. - Flow - Force - Opposition - Unit Force 10mA would be an example of __________ value. - Current - Voltage - Resistance - Wattage Current If a wire has continuity, it __________. - Cannot conduct current - Will have almost no resistance - Cannot be used in a circuit - Has an open Will have almost no resistance The measure of energy consumed by a circuit is called __________. - Usage - Power - Dissipation - Consumption power The amount two electrical waveforms are out of phase is measured in __________. - Volts - Amps - Degrees - Seconds Degrees When the wire or foil strip inside a fuse melts, the fuse is said to be __________. - Shot - Done - Blown - Tripped blown The type of overload protection that protects the motor by disconnecting it physically instead of electrically is a(n) __________. - Overload clutch - Thermal overload - Solid state overload - Magnetic overload Overload clutch When connecting a 3-phase motor the three lines (T1,T2 and T3) are usually connected to __________. - A1, A2, and A3 - L1, L2, and L3 - 3A, 3B, and 3C - Each other L1, L2, and L3 For a single-phase AC motor, only __________ motor wires connect to the power lines. - 1 - 2 - 3 - 4 2 Electrical wiring that runs in exposed locations must be protected by pipe or tubing called __________. - Over-current protection - Conductor - Conduit - Disconnect Conduit The Ohm's Law formula for calculating voltage is __________. - E = I × R - E = P × R - E = P × I × R - All of the above - None of the above E = IxR Kirchoff's Voltage Law for a series circuit shows that the total voltage dropped in a series circuit is equal to the __________ of the individual voltage drops. - Smallest - Sum - Product - Largest sum Which of the following is an advantage of a circuit breaker over a fuse? - Costs less - Takes up less space - Can be reset - All of the above can be reset A technician has removed a piece of equipment from a disconnect, but the breaker still trips. The next step is to check the wiring to the disconnect and __________. - Replace the wiring - Test the breaker again - Replace the disconnect - Replace the equipment Test the breaker again