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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
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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
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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
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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
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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
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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
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