CGIs are used to determine what property of vapors?

CGIs are used to determine what property of vapors?

• A. They monitor barometric pressure
• B. They measure humidity
• C. They assess color changes in vapors
• D. They determine the flammability of vapors

Answer: (D)

CGIs are used to determine whether vapors pose a flammability hazard. They provide a quick readout of how close the vapor concentration in air is to the flammable range, often translating the signal into a percentage of the lower explosive limit. This information helps responders decide on actions like ventilation or exclusion of ignition sources. They aren’t meant to measure barometric pressure or humidity, and while some indicators use color changes as the signal, the purpose is to assess flammability, not to track those other properties.

CGIs are used to determine whether vapors pose a flammability hazard. They provide a quick readout of how close the vapor concentration in air is to the flammable range, often translating the signal into a percentage of the lower explosive limit. This information helps responders decide on actions like ventilation or exclusion of ignition sources. They aren’t meant to measure barometric pressure or humidity, and while some indicators use color changes as the signal, the purpose is to assess flammability, not to track those other properties.