Plasma Arc Cutting (PAC) exam study guide with 100% correct answers

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 cutting torch contains a _____. retaining cup, copper electrode with a hafnium or thoriated tungsten insert, gas swirl ring, and nozzle The term standoff distance refers to the ________. distance between the torch tip and the workpiece Most heavy-duty plasma arc cutting systems require one gas cylinder containing the cutting gas and another containing _____. . shielding or cooling gas Some light-duty PAC equipment has a built-in _____. air compressor Cutting a 2" (5 cm) aluminum plate requires a(n) _____. high-cutting amperage To pierce very thin metal using plasma arc cutting, hold the torch at a _____. 0-degree work angle When gas cylinders are disconnected from a plasma arc cutting unit before it is stored, be sure to _____. replace the cylinder caps Sputtering or hissing of the torch is often caused by _____. moisture entering the unit through the air line A full leather hood __________. is considered optional PPE for plasma arc cutting .Never carry matches or gas-filled lighters in your pockets. True or False True The plasma arc cutting process type most used is the ________. transferred arc process When operating plasma arc cutting equipment, it is acceptable to wear a hat made of __________. 100% cotton The duty-cycle range for a light duty unit is typically _________. 35% The typical plasma arc cutting torch usually contains a replaceable retaining cup, comprised of a copper electrode with a(n) _______. hafnium or thoriated tungsten insert Some types of PAC torches inject water to create a whirlpool of water around the jet to ________.. cut with a more uniform melt rate To remove, attach, or tighten the regulator's connection to a gas cylinder, you would use _______. an adjustable wrench or correctly sized open-end wrench To pierce very thin metal with a PAC torch you should ______.. hold the torch directly over the point to be pierced at a 0-degree work angle If the PAC equipment exhibits a moisture problem, you should first _______. drain the air filter/moisture separator bowl