Which of these is listed as a possible source of ignition?

Which of these is listed as a possible source of ignition?

• A. Air
• B. Water
• C. Cold temperature
• D. Vacuum

Answer: (A)

Ignition needs a fuel, enough heat, and an oxidizer. In most environments, the oxidizer is the oxygen found in air, so air can be a source of ignition because it provides the oxygen that allows combustion to occur when there is fuel and sufficient heat. Water doesn’t ignite; it absorbs heat and can extinguish. Cold temperatures slow or prevent reaching ignition temperature. A vacuum removes oxygen, making ignition unlikely. So air is listed as a possible source of ignition because it supplies the oxygen needed for combustion.

Ignition needs a fuel, enough heat, and an oxidizer. In most environments, the oxidizer is the oxygen found in air, so air can be a source of ignition because it provides the oxygen that allows combustion to occur when there is fuel and sufficient heat. Water doesn’t ignite; it absorbs heat and can extinguish. Cold temperatures slow or prevent reaching ignition temperature. A vacuum removes oxygen, making ignition unlikely. So air is listed as a possible source of ignition because it supplies the oxygen needed for combustion.