Oxyfuel Gas Processes (Welding and Cutting) Exam #1
Question with verified answers
What is included in a complete oxyfuel gas welding outfit? - √√Oxygen cylinder,
fuel gas, regulators, hoses, welding torch, goggles or helmet, striker.
What color is commonly associated with oxygen cylinders? - √√Green.
How is oxygen typically obtained for welding? - √√By liquefying atmospheric air or
through electrolysis of water.
What safety precautions should be taken when handling oxygen cylinders? -
√√Open the valve fully or close it completely, transport with safety cap, secure
cylinders, avoid smoking, and keep combustibles away.
What is the primary fuel gas used in oxyfuel welding? - √√Acetylene.
How is acetylene produced? - √√By the chemical reaction between calcium
carbide and water.
What safety feature do acetylene cylinders have? - √√Fuse plugs that melt at 212
degrees to release gas before bursting.
What is the purpose of a pressure regulator in oxyfuel welding? - √√To reduce and
stabilize the gas pressure between the cylinder and the torch.
What distinguishes oxygen hoses from acetylene hoses? - √√Oxygen hoses are
green; acetylene hoses are red or have grooves and left-handed threads.
, What is a positive-pressure torch? - √√A torch that requires oxygen and fuel gas to
be supplied under pressure to the mixing chamber.
What is the function of the welding tip? - √√It is where combustion takes place,
and its size indicates the gas rate it can produce.
What are check valves used for in oxyfuel gas systems? - √√To prevent the reverse
flow of gases through the torch, hoses, or regulators.
What are flashback arrestors designed to do? - √√To eliminate the possibility of an
explosion in the regulator or cylinder.
What are welding fluxes used for? - √√To join certain metals with solder, silver
alloys, or copper alloys.
What is the difference between brazing and soldering? - √√Brazing uses a third
metal that melts above 840 degrees; soldering uses a metal that melts below 840
degrees.
What should be done before attaching a regulator to an oxygen cylinder? -
√√Clean the cylinder opening by cracking the valve slightly.
What materials should be kept away from oxygen supplies? - √√Organic or
combustible materials like grease, oil, and cloth.
Question with verified answers
What is included in a complete oxyfuel gas welding outfit? - √√Oxygen cylinder,
fuel gas, regulators, hoses, welding torch, goggles or helmet, striker.
What color is commonly associated with oxygen cylinders? - √√Green.
How is oxygen typically obtained for welding? - √√By liquefying atmospheric air or
through electrolysis of water.
What safety precautions should be taken when handling oxygen cylinders? -
√√Open the valve fully or close it completely, transport with safety cap, secure
cylinders, avoid smoking, and keep combustibles away.
What is the primary fuel gas used in oxyfuel welding? - √√Acetylene.
How is acetylene produced? - √√By the chemical reaction between calcium
carbide and water.
What safety feature do acetylene cylinders have? - √√Fuse plugs that melt at 212
degrees to release gas before bursting.
What is the purpose of a pressure regulator in oxyfuel welding? - √√To reduce and
stabilize the gas pressure between the cylinder and the torch.
What distinguishes oxygen hoses from acetylene hoses? - √√Oxygen hoses are
green; acetylene hoses are red or have grooves and left-handed threads.
, What is a positive-pressure torch? - √√A torch that requires oxygen and fuel gas to
be supplied under pressure to the mixing chamber.
What is the function of the welding tip? - √√It is where combustion takes place,
and its size indicates the gas rate it can produce.
What are check valves used for in oxyfuel gas systems? - √√To prevent the reverse
flow of gases through the torch, hoses, or regulators.
What are flashback arrestors designed to do? - √√To eliminate the possibility of an
explosion in the regulator or cylinder.
What are welding fluxes used for? - √√To join certain metals with solder, silver
alloys, or copper alloys.
What is the difference between brazing and soldering? - √√Brazing uses a third
metal that melts above 840 degrees; soldering uses a metal that melts below 840
degrees.
What should be done before attaching a regulator to an oxygen cylinder? -
√√Clean the cylinder opening by cracking the valve slightly.
What materials should be kept away from oxygen supplies? - √√Organic or
combustible materials like grease, oil, and cloth.
