At what percent concentration in air can propane become flammable?

At what percent concentration in air can propane become flammable?

• A. 1.5% to 5.5%
• B. 2.1% to 9.5%
• C. 3% to 10%
• D. 4% to 12%

Answer: (B)

Propane is a hydrocarbon fuel that can form a flammable mixture with air within a specific concentration range. The correct answer indicates that propane can become flammable in the air at concentrations between 2.1% and 9.5%. This range is referred to as the flammability or explosibility limits of propane, and it is essential for safety in handling and storing propane. When propane concentrations fall below 2.1%, the mixture is considered too lean to ignite, meaning there isn't sufficient propane to sustain combustion. Conversely, concentrations above 9.5% are too rich, leading to a lack of oxygen necessary for ignition. Therefore, within the specified range of 2.1% to 9.5%, the propane can combust if exposed to an ignition source, making it crucial for technicians and safety personnel to be aware of these limits to prevent accidents such as explosions or fires during propane handling and use. Understanding this concentration range is vital for ensuring that propane systems are operated safely.

Propane is a hydrocarbon fuel that can form a flammable mixture with air within a specific concentration range. The correct answer indicates that propane can become flammable in the air at concentrations between 2.1% and 9.5%. This range is referred to as the flammability or explosibility limits of propane, and it is essential for safety in handling and storing propane.

When propane concentrations fall below 2.1%, the mixture is considered too lean to ignite, meaning there isn't sufficient propane to sustain combustion. Conversely, concentrations above 9.5% are too rich, leading to a lack of oxygen necessary for ignition. Therefore, within the specified range of 2.1% to 9.5%, the propane can combust if exposed to an ignition source, making it crucial for technicians and safety personnel to be aware of these limits to prevent accidents such as explosions or fires during propane handling and use. Understanding this concentration range is vital for ensuring that propane systems are operated safely.