During a fire, how many master warning lights are activated?

In the event of a fire, the activation of two master warning lights is significant because it indicates a critical situation that requires immediate attention from the crew. The dual activation serves to enhance visibility and awareness of the emergency, ensuring that the pilots recognize that there is a dangerous condition requiring prompt action.

This system is designed to assist in the prioritization of flight management tasks during emergencies. Having two lights activated makes it more likely that the pilots will notice the warning, as they are given a clear visual cue that something is critically wrong. This redundancy in warning systems underscores the importance of pilot situational awareness and safety protocols in emergency situations.

The incorrect options do not reflect the design intent of the warning system for such emergencies. One light may not provide the necessary urgency, while three or four lights could potentially lead to confusion or an overwhelming response rather than a clear, urgent call to action. Hence, the intended response to a fire scenario is effectively communicated through the activation of two master warning lights.