Which measure is a direct safety practice when refilling an SCBA cylinder to prevent overheating?

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Multiple Choice

Which measure is a direct safety practice when refilling an SCBA cylinder to prevent overheating?

Explanation:
Preventing heat buildup during a refill comes from controlling how fast the gas is introduced. Filling an SCBA cylinder quickly generates more heat due to gas compression and friction inside the cylinder. A slow fill minimizes that heat, giving time for any generated heat to dissipate and helping keep the cylinder within safe temperature and pressure limits. While checks for damage and appropriate PPE are important, and avoiding overpressurization matters for safety, they don’t directly prevent overheating the way a gradual, controlled fill does.

Preventing heat buildup during a refill comes from controlling how fast the gas is introduced. Filling an SCBA cylinder quickly generates more heat due to gas compression and friction inside the cylinder. A slow fill minimizes that heat, giving time for any generated heat to dissipate and helping keep the cylinder within safe temperature and pressure limits. While checks for damage and appropriate PPE are important, and avoiding overpressurization matters for safety, they don’t directly prevent overheating the way a gradual, controlled fill does.

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