Upper and lower flammability information is found in which resource?

Upper and lower flammability information is found in which resource?

• A. Pg 58-147+148+149
• B. Hose length 18 ft
• C. Pg 135 chart
• D. Air to propane ratio 4% propane to 96% air or 1:24

Answer: (C)

Understanding flammability limits means knowing the range of air–propane mixtures that can ignite. The chart on page 135 is the reference that lists these limits for propane in air, showing the lower flammable limit and the upper flammable limit (roughly 2.1% propane by volume for the lean side and about 9.5% for the rich side). This chart helps you determine whether a given environment could support ignition and guides you to take safer actions, like improving ventilation or eliminating leaks, when you’re working with propane. The other options don’t provide the official source for these limits: a broad page-range isn’t a specific reference chart, hose length isn’t related to flammability limits, and a stated air-to-propane ratio is a separate concept, not the documentation that lists the upper and lower flammability values.

Understanding flammability limits means knowing the range of air–propane mixtures that can ignite. The chart on page 135 is the reference that lists these limits for propane in air, showing the lower flammable limit and the upper flammable limit (roughly 2.1% propane by volume for the lean side and about 9.5% for the rich side). This chart helps you determine whether a given environment could support ignition and guides you to take safer actions, like improving ventilation or eliminating leaks, when you’re working with propane. The other options don’t provide the official source for these limits: a broad page-range isn’t a specific reference chart, hose length isn’t related to flammability limits, and a stated air-to-propane ratio is a separate concept, not the documentation that lists the upper and lower flammability values.