Cylinders in use must not exceed a temperature of which specified degree Fahrenheit?

The specified maximum temperature for cylinders in use is critical to ensure safety and proper functioning. A maximum temperature of 125 degrees Fahrenheit helps prevent the risk of a gas cylinder failing or exploding due to excessive heat. High temperatures can increase the pressure inside a cylinder, which may lead to dangerous situations, such as leaks or ruptures.

Maintaining the temperature limit at 125 degrees ensures a reasonable margin of safety while still allowing for proper operational conditions. This temperature threshold aligns with safety regulations in the medical gas industry, which prioritize the safe handling and storage of gas cylinders to protect both the users and patients.

The other options, while they represent progressively higher temperature limits, do not adhere to the safety guidelines established for the handling of medical gas cylinders.