Compressed gas is defined by a specific pressure reading. Which example matches this definition?

Compressed gas is defined by a specific pressure reading. Which example matches this definition?

• A. Gives a pressure reading of either 25 psi at 70 F, or 25 psi at 130 F
• B. Must be below 5 psi at all times
• C. Is always above 100 psi regardless of temperature
• D. Is never measured or controlled for safety

Answer: (A)

Compressed gas is identified by a measurable pressure reading on a gauge, since being under pressure defines its state and that pressure can vary with temperature. The example that matches this idea is a scenario where the gas shows a specific reading on the gauge—25 psi at 70 F or 25 psi at 130 F—highlighting that the pressure is what defines the condition, even as temperature changes. The other statements impose fixed thresholds or deny measurement and safety control, which do not capture how a compressed gas is actually defined by its pressure reading.

Compressed gas is identified by a measurable pressure reading on a gauge, since being under pressure defines its state and that pressure can vary with temperature. The example that matches this idea is a scenario where the gas shows a specific reading on the gauge—25 psi at 70 F or 25 psi at 130 F—highlighting that the pressure is what defines the condition, even as temperature changes. The other statements impose fixed thresholds or deny measurement and safety control, which do not capture how a compressed gas is actually defined by its pressure reading.