Propane uses which CGA fitting number?

Propane uses which CGA fitting number?

• A. 510
• B. 400
• C. 600
• D. 320

Answer: (A)

The concept being tested is that CGA numbers identify the specific valve/outlet connection used for a gas cylinder. Propane is assigned the CGA 510 outlet, so the regulator, hose, and cylinder must all have that matching connection. This standardization prevents mixing or cross-connecting different gases, which could be dangerous. The other numbers correspond to different gas outlets and would not correctly mate with a propane cylinder, so they’re not suitable choices for propane. Always verify the gas type and use the matching CGA fitting, then check for leaks after assembly.

The concept being tested is that CGA numbers identify the specific valve/outlet connection used for a gas cylinder. Propane is assigned the CGA 510 outlet, so the regulator, hose, and cylinder must all have that matching connection. This standardization prevents mixing or cross-connecting different gases, which could be dangerous. The other numbers correspond to different gas outlets and would not correctly mate with a propane cylinder, so they’re not suitable choices for propane. Always verify the gas type and use the matching CGA fitting, then check for leaks after assembly.