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24: Review Questions
List five fuel gases used in oxyfuel gas welding or cutting.
True or False.
Oxygen cylinders and hoses are green in color; acetylene cylinders and hoses are red in color.
A. True
B. False
Acetylene becomes unstable and explosive at or above _____ psig (_____ kPa) if it is allowed to collect in large volume as a gas.
Which type of gas cylinder uses a fusible plug?
True or False.
For extra protection, safety glasses should be worn under a welding helmet, face shield, or welding goggles.
A. True
B. False
Why should a safety cap be used on a cylinder when it is moved or stored?
What happens in an oxygen cylinder safety valve to prevent an explosion during a fire?
Liquid oxygen is stored in a(n) _____ flask.
A(n) _____ is used to connect several cylinders to one delivery pipe.
Name one metal that should not be used for tubing or pipes that carry acetylene.
A(n) _____ is used to reduce and control the pressure of the welding gases.
When the regulator adjusting screw feels loose in its threads, is the regulator opened or closed?
The cylinder pressure gauge on an oxygen regulator is commonly marked to indicate pressures of up to ___ or ___ psig (____ or ____ MPa kPa).
Low-pressure acetylene gauges are often shaded in red above _____ psig (_____ kPa).
What is a siamese welding hose?
Explain the difference between a cutting torch tip and a welding torch tip.
True or False?
Oxygen flowing through an acetylene hose may cause an explosion.
A. True
B. False
Refer to Figure 24-34. List the diameters of four commonly used welding rods.
When opening or closing torch valves, how much force should be applied?
A correct size _____ or _____ should be used to clean the torch tip orifice.
The recommended filter lenses for oxyfuel gas welding are #_____ to #_____.
A(n) _____ is a one-way valve that prevents gases from burning back to the regulator.
Explain the difference between acetylene and oxygen hose nuts.
Pant leg cuffs and pockets are not recommended on welding clothing. Why?
Oil, grease, kerosene, cloth, tar, wood, and coal dust must be kept away from all _____ fittings to prevent fires or explosions.
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