What is the proper lighting device for an oxy-acetylene torch?

• A. Electric spark
• B. Piezoelectric igniter
• C. Flint operated spark making device
• D. Pilot flame

Answer: (C)

Lighting an oxy-acetylene torch is done with a flint-operated spark lighter. This device creates a brief, precise spark right at the torch tip to ignite the acetylene-oxygen mixture without introducing a continuous flame from the ignition source. That quick, controllable spark helps prevent backfires and keeps the ignition process safe and reliable. Electronic ignition options exist in other appliances, but for standard oxy-fuel torch practice, the traditional spark lighter is the preferred method. A pilot flame would require keeping a flame burning near the torch to light it, which adds unnecessary risk and is not the chosen method in typical training and use.