Which statement best describes high-voltage turbine ignition systems compared with low-voltage systems?

Which statement best describes high-voltage turbine ignition systems compared with low-voltage systems?

• A. Require glow plugs
• B. Use a capacitor discharge concept
• C. Operate with higher voltage to the igniter electrodes
• D. Have no spark produced

Answer: (C)

The key idea is that high-voltage turbine ignition systems deliver a much higher electrical potential to the igniter electrodes than low-voltage systems. That higher voltage translates into more spark energy, which is essential for reliably igniting the fuel–air mixture in a turbine combustor under demanding conditions like high airflow, high pressure, and lean mixtures. While some systems may use a capacitor-discharge method to deliver the spark quickly, the defining difference being tested is the higher voltage to the igniter itself. Glow plugs aren’t used for turbine igniters, and these systems do produce a spark, not no spark.

The key idea is that high-voltage turbine ignition systems deliver a much higher electrical potential to the igniter electrodes than low-voltage systems. That higher voltage translates into more spark energy, which is essential for reliably igniting the fuel–air mixture in a turbine combustor under demanding conditions like high airflow, high pressure, and lean mixtures. While some systems may use a capacitor-discharge method to deliver the spark quickly, the defining difference being tested is the higher voltage to the igniter itself. Glow plugs aren’t used for turbine igniters, and these systems do produce a spark, not no spark.