What is a characteristic of ignitor plugs on a turbine engine?

The characteristic of ignitor plugs on a turbine engine is best captured by the point regarding having a greater spark plug gap to withstand higher spark intensity and lower gas pressure. Ignitor plugs are specifically designed to create a reliable spark necessary to ignite the fuel-air mixture during the crucial phases of engine operation, particularly during start-up and in certain operational conditions.

Having a greater spark plug gap is essential because turbine engines often operate under high pressure and temperature conditions. The increased gap allows for a stronger, more intense spark, which is crucial for ignition in the varied conditions that may exist within the combustion chamber. This design consideration ensures that the ignitor can effectively spark even when the gas pressure is lower, facilitating proper engine function.

While the other options may hold some validity in specific contexts, they do not accurately reflect the primary role and design features of ignitor plugs in turbine engines as effectively as this option does.