Pre-ignition refers to

Pre-ignition refers to

• A. Ignition by an electrical spark.
• B. Energy transfer from a gas to a fuel.
• C. Phase change of a material.
• D. Water entering a fire system.

Answer: (B)

Pre-ignition is premature ignition caused by heat energy transferring to the fuel, bringing it to its ignition temperature before the normal ignition source acts. The reasoning here is that energy moving from a hot gas to a fuel can cause the fuel to ignite earlier than intended, which matches the description of energy transfer from a gas to a fuel. Ignition by an electrical spark is a deliberate, controlled ignition event, not premature ignition. A phase change is a physical change in state, not ignition. Water entering a fire system is unrelated to the timing or mechanism of ignition.

Pre-ignition is premature ignition caused by heat energy transferring to the fuel, bringing it to its ignition temperature before the normal ignition source acts. The reasoning here is that energy moving from a hot gas to a fuel can cause the fuel to ignite earlier than intended, which matches the description of energy transfer from a gas to a fuel. Ignition by an electrical spark is a deliberate, controlled ignition event, not premature ignition. A phase change is a physical change in state, not ignition. Water entering a fire system is unrelated to the timing or mechanism of ignition.