General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

What conditions must be met for CONT ignition to operate on the ground?

1. Engine oil temperature above normal

2. Fuel control switch in RUN, thrust above 55% N1, and flaps set for takeoff

3. Altitude above 10,000 feet

4. Battery voltage within limits

The correct answer is: Fuel control switch in RUN, thrust above 55% N1, and flaps set for takeoff

The conditions for CONT ignition to operate on the ground primarily include specific parameters that ensure the engine is in an appropriate state for ignition to be continuous. Having the fuel control switch in the RUN position ensures that fuel is properly supplied to the engine for combustion. In addition, having the thrust above a certain percentage of N1 (specifically 55%) indicates that the engine is operating at a sufficient power level to engage the CONT ignition system effectively. The requirement that the flaps are set for takeoff suggests that the aircraft is in a configuration for departure, reinforcing the need for ignition stability during critical phases of operation. In contrast, the other options do not meet the criteria necessary for CONT ignition activation on the ground. Engine oil temperature being above normal does not directly influence the ignition system's operation but rather pertains to engine health. Altitude above 10,000 feet is typically more relevant to in-flight operations where performance factors change; it does not apply to ground conditions. Finally, battery voltage while important for overall systems operation does not specifically indicate whether CONT ignition can be engaged. Thus, option B covers the essential conditions for CONT ignition successfully operating on the ground.