AMP - Aviation Maintenance Technician Powerplant Practice Exam

Question: 1 / 400

Why do igniter plugs used in turbine engines have a long service life?

They have a high intensity spark.

They operate continuously with a lower spark.

They do not require continuous operation.

Igniter plugs used in turbine engines have a long service life because they do not require continuous operation. Unlike spark plugs in other engines, igniter plugs only need to activate during startup and then are not needed during normal engine operation. This significantly reduces wear and tear on the electrode and extends the overall life of the igniter plug. Options A, B, and D may seem plausible, but they do not provide a complete explanation for the long service life of igniter plugs used in turbine engines. Option A mentions a high intensity spark, but this alone does not ensure a long service life. Option B mentions continuous operation, but as previously stated, igniter plugs do not need to operate continuously. Option D mentions design, but without the factor of not needing continuous operation, design alone would not be enough to ensure a long service life.

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Their design significantly reduces electrode erosion.

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