20 Questions
Which gas is used as the primary fuel for oxy-fuel welding and cutting?
Acetylene
What is the maximum working pressure for the acetylene pressure gauge during welding or cutting?
15 psi
Which gas is commonly used as a gas shield for the electrode in MIG, TIG, and plasma welding equipment?
Argon
Which of the following determines the amount of heat applied to the work in oxy-fuel welding?
The size of the tip opening
Which of the following can cause a backfire in an oxy-fuel welding torch?
All of the above
What is the purpose of welding eyewear in oxy-fuel welding?
To protect the welder's eyes from the bright flame and flying sparks
Which type of regulator maintains a more constant outlet pressure and flow as the cylinder volume and pressure drops?
Two stage regulator
What is the purpose of a flashback arrestor installed on each hose?
To stop the reverse flow of gas
Which type of torch is commonly used for oxy-acetylene welding and has a mixing chamber?
Equal pressure torch
Which type of flame is used for most welding?
Neutral flame
What should be used to check for a leak in welding equipment?
Soapy water
What does the number on a welding tip represent?
The size of the hole in the tip
Which of the following materials are considered nonferrous rods?
Brass and aluminum
Why is it important to clean filler rods prior to use?
To prevent contamination
Why should acetylene cylinders be stored and transported in the upright position?
To prevent leakage
Which flame is best used for welding high-carbon steels, for hard facing, and for welding nonferrous alloys such as aluminum, nickel, and Monel?
Carburizing (reducing) flame
What is the temperature at which the carburizing flame burns?
5,700 °F
What is the distinguishing feature of the oxidizing flame?
Shorter outer flame and small, white, inner cone
What is the purpose of using a slightly oxidizing flame in bronze welding (brazing) of steel and cast iron?
To reduce the amount of oxygen in the iron oxides
What is the potential danger of a flashback in gas welding?
Great damage and personal injury
Test your knowledge of nonferrous welding rods and their properties with this quiz. Learn about the appropriate rod diameter for different metal thicknesses and avoid common mistakes like burned holes.
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