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Pipeline Pressure 400 kPa — FRCA Primary MCQ

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ModeratePhysics & Clinical MeasurementPipeline Pressure 400 kPaFRCA Primary

The pressure relief valve on an anaesthetic machine pipeline supply is set to:

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Correct answer: C — 400 kPa

Pipeline gas supply to the anaesthetic machine is at approximately 400 kPa (4 bar / 60 psi). The pressure relief valve is set at this pressure to protect downstream components. Cylinder gas regulators reduce cylinder pressure (e.g. O2 at 13700 kPa / N2O at variable pressure depending on liquid content) to 400 kPa.

Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment