Ignition and Starting Systems Which of the following are included in a typical turbine engine ignition system? 1. Two igniter plugs. 2. Two transformers. 3. One exciter unit. 4. Two intermediate ignition leads. 5. Two low tension igniter leads. 6. Two high tension igniter leads. a. 2, 3, 4 b. 1, 4, 5. c. 1, 3, 6.