Welder Red Seal · Question
What is the maximum safe pressure for drawing acetylene from a single cylinder to prevent pulling acetone out of the cylinder?
Free acetylene is unstable and explosive above 15 psi. Inside a cylinder, it is dissolved in acetone within a porous filler. Drawing acetylene at pressures abov
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Question: What is the maximum safe pressure for drawing acetylene from a single cylinder to prevent pulling acetone out of the cylinder?
Answer options: ✅ 15 psi (103 kPa)
- 30 psi (207 kPa)
- 50 psi (345 kPa)
- 100 psi (689 kPa)
Correct answer: 15 psi (103 kPa)
Explanation: Free acetylene is unstable and explosive above 15 psi. Inside a cylinder, it is dissolved in acetone within a porous filler. Drawing acetylene at pressures above 15 psi can cause it to become unstable and can also draw the liquid acetone stabilizer into the hoses and torch, creating a serious hazard.
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