NCCER

Combining pure oxygen with a burning material causes a fire to flare and burn out of control. When a cutting job is completed and the oxyfuel equipment is no longer needed the first step in shutting down the oxyfuel cutting equipment is to close the fuel gas cylinder valve. When cutting thin steel with oxyfuel cutting equipment, hold the torch so that the tip is pointing in the direction the torch is traveling at a 15 to 20 degree angle. On a combination cutting torch, th...

Lockout/Tagout The formal procedure for taking equipment out of service and ensuring it cannot be operated until an authorized person has returned it to service is _______. Excavation A(n) ___________ is any man-made cut, cavity, trench, or depression in an earth surface, formed by removing earth. Competent person A(n) _____________ identifies unsanitary, hazardous, or dangerous working conditions and has the authority to correct or eliminate them. Confined space A(n) __...

Another name for a machinist's hammer is A. Ball-peen hammer B. Claw hammer C. Veneer hammer D. Sledgehammer A. Ball-peen hammer A heavy-duty tool used to drive posts or other large stakes is a A. Mallet B. Sledgehammer C. Bell-faced hammer D. Ball-peen hammer B. Sledgehammer The proper angle for the edges of a cold chisel is A. 90 degrees B. 60 degrees C. 45 degrees D. 30 degrees B. 60 degrees The type of screw is shaped like a square (see picture) a A. Phi...

(A-CAC) A jet of compressed air passing through the electrode holder and its head blows the molten metal away. All positions This (A-CAC) process can be used in _______________ on any metal that will conduct electricity, such as carbon steel, stainless steel, cast iron, and copper, as well as their alloys. gouge weld grooves, back-gouge welds, defective welds, cracks for welding It is primarily used to ___________________, ______________, ______________, and to prepare _________...

A-CAC This process can be used in all positions on any metal that will conduct electricity? gouge A primary purpose of the A-CAC process is to ________ weld grooves and prepare cracks for welding. compressed air To blow molten metal away, the A-CAC process uses jets of _________________ ______. currents The _______________ used with A-CAC electrodes compared to shielded metal arc welding (SMAW) electrodes of the same size are much higher. DC constant-current The ...

In plasma arc cutting, plasma is created by _____. . super heating gas in an electric arc In most cases, plasma arc cutting is _____. faster and more efficient than other cutting methods The simplest plasma arc cutting units use filtered _____. .compressed air Industrial plasma cutting units can cut carbon steel up to _____. 3" thick The most common plasma arc cutting torch uses _____. a pilot arc with the transferred arc process The typical plasma arc ...

To gouge weld grooves, to back-gouge welds, and to gouge out defective welds One of the primary uses for air-carbon arc cutting (A-CAC) is___. 6" (15 cm) When the electrode is gripped in the torch handle, the electrode tip should be no further from the heads than ___. A rare-earth metal Electrodes designed for A-CAC use are copper coated and contain an arc-stabilizing ingredient referred to as ___. That the carbon arc electrodes to be used are completely dry. One of the...

Gas In PAC, plasma is created by ___________? Faster & Efficient In most cases, PAC is ___________ & more ____________ than other cutting methods. A full leather hood Which PPE is considered optional in PAC? Gas Never carry matches or _________ filled lighters in your pockets. Compressed air The simplest PAC units use filtered __________? 3" thick Industrial plasma cutting units can cut carbon steel up to ________ " thick? Pilot arc Most common ...

Duty Cycle The percentage of a ten-minute period that a welding machine can continuously produce its rated amperage without overheating. Governor A device used to limit engine speed. Motor-generator A combination device in which the motor turns the shaft of a generator which in turn produces an AC voltage. Conductor A material that will support the flow of an electrical current. Copper wire is the most common conductor. Polarity Refers to the direction of electri...

Welding symbols in WPS (Welding Procedure Sheet) they convey specific details for the weld Reference line base for all welding symbols. It is a horizontal line with an arrow at one end. Arrow line can be on either side of the reference line and it points to the location the welding symbol is to be applied American Welding Society (AWS) Most companies use the welding symbols from A2.4:2007, Standard Symbols for Welding, Brazing, and Nondestructive Examination as standardi...