Which of the following statements describes the primary reason for the device shown in the illustration to be incorporated into the air start system? Illustration MO-0116

Correct Answer: Option C — The unit shown is used to prevent starting of the main engine when the turning gear is engaged.

This safety interlock pneumatic device prevents the main engine starting air system from being pressurized whenever the flywheel turning gear is physically engaged, protecting personnel and machinery from catastrophic damage.