When testing cylinders for leaks, what characteristic should the test solution have?

When testing cylinders for leaks, what characteristic should the test solution have?

• A. It should contain oil or grease.
• B. It should be oil-free.
• C. It should be highly abrasive.
• D. It should be colored.

Answer: (B)

Testing cylinders for leaks relies on a bubble-forming solution to reveal leak points. The solution must be oil-free because oil or grease around pressurized gas lines can ignite or react dangerously, especially with oxidizers like oxygen. Oil residues can also contaminate fittings and interfere with bubble formation, making leaks harder to spot. A colored or abrasive solution isn’t required and could cause other issues, and any oil content would defeat the safety purpose. Therefore, using an oil-free test solution is essential for safe and effective leak detection.

Testing cylinders for leaks relies on a bubble-forming solution to reveal leak points. The solution must be oil-free because oil or grease around pressurized gas lines can ignite or react dangerously, especially with oxidizers like oxygen. Oil residues can also contaminate fittings and interfere with bubble formation, making leaks harder to spot. A colored or abrasive solution isn’t required and could cause other issues, and any oil content would defeat the safety purpose. Therefore, using an oil-free test solution is essential for safe and effective leak detection.