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Gas Fitter Practice · Question

What is the minimum working pressure for a propane cylinder used to supply a gas appliance?

The pressure in a propane cylinder is determined by the ambient temperature, as propane vaporizes and creates pressure within the tank. It is not a fixed 'worki

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Question: What is the minimum working pressure for a propane cylinder used to supply a gas appliance?

Answer options:

  • It varies by appliance and jurisdiction.
  • Approximately 10 psig (69 kPa)
  • Propane cylinders supply liquid, not pressure. ✅ Propane cylinders supply vapour pressure determined by ambient temperature.

Correct answer: Propane cylinders supply vapour pressure determined by ambient temperature.

Explanation: The pressure in a propane cylinder is determined by the ambient temperature, as propane vaporizes and creates pressure within the tank. It is not a fixed 'working pressure' like pipeline natural gas.

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