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25: Review Questions
How are the cylinder valve outlets cleaned before the regulators are installed?
True or False.
Both the acetylene and the oxygen regulator adjusting screws must be turned counterclockwise until they feel loose before the cylinder valves are opened.
A. True
B. False
True or False.
A regulator is opened and gas flows into the regulator by turning the adjusting screw or handle to the right.
A. True
B. False
Why must you stand to the side of the regulators while opening the cylinder valves?
The torch valve must be _____ before adjusting the working pressure on the regulator.
The _____ and _____ are checked for leaks when the welding outfit is turned on and the regulator and torch valves are closed.
What type of soap must never be used when checking oxygen fittings?
How far should you open the acetylene torch valve when lighting the torch?
Describe the appearance of a neutral flame.
Describe the characteristics of an oxidizing flame and describe its effect on the base metal.
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