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6 Cards in this Set

  • Front
  • Back
acetylene is kept under pressure in cylinders. Why should acetylene be dissolved?

a. To keep the acetylene from solidifying
b. To obtain a hotter welding flame
c. To keep the acetylene from exploding
d. To protect the cylinder from internal corrosion
c. To keep the acetylene from exploding
An acetylene cylinder has been stored in a horizontal position. Before using the cylinder for welding, you should take which of the following action?

a. Stand the cylinder in an upright position for 2 hours
b. Release some of the acetyelene by opening the valve slightly
c. Remove any moisture that may have accumulated in the cylinder
d. Stand the cylinder in a vertical position with the valve down for 2 hours
a. Stand the cylinder in an upright position for 2 hours
What is the purpose of a two-step regulator?

a. To change the working pressures of oxygen and acetylene at the same time
b. To reduce the cylinder pressure to a working pressure in two stages
c. To measure both the content and pressure of oxygen and acetylene cylinders
d. To raise the cylinder working pressure in two steps
b. To reduce the cylinder pressure to a working pressure in two stages
The volume of oxygen and acetylene burned at the torch tip is controlled by what means?

a. A single needle valve at the torch
b. Seperate mixing heads for each gas
c. Seperate needle valves for each gas at the torch
d. Different sizes of tips
c. Seperate needle valves for each gas at the torch
If the tip orifice becomes partially clogged, what will happen to the flame?

a. It will go out
b. It will not burn properly
c. It will burn with a smaller flame
d. It will burn hotter since the gas pressure will be increased
b. It will not burn properly
Which of the following tools should you use to clean a torch tip?

a. Jeweler's files or soft steel wire
b. Tip cleaners or jeweler's files
c. Drill bits or jeweler's files
d. Tip cleaners or soft copper wire
d. Tip cleaners or soft copper wire