Which CC is responsible to switch on the ELS when ELT type A/B is used?

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Multiple Choice

Which CC is responsible to switch on the ELS when ELT type A/B is used?

Explanation:
The situation tests which control computer is responsible for turning on the Emergency Lighting System when a specific ELT type (A/B) is used. The key idea is that the ELT type A/B sends a signal that must be recognized by the control path that actually governs the ELS. Only the CC that has the ELT A/B input wired into its logic, and is designated to control the ELS, will switch it on. The other CCs either don’t receive the ELT A/B signal or don’t have authority over the ELS, so they won’t activate it. So the correct choice is the CC that is directly connected to the ELT A/B interface and programmed to control the ELS, since it has the proper signal and control path to trigger the emergency lighting when that ELT type is used.

The situation tests which control computer is responsible for turning on the Emergency Lighting System when a specific ELT type (A/B) is used. The key idea is that the ELT type A/B sends a signal that must be recognized by the control path that actually governs the ELS. Only the CC that has the ELT A/B input wired into its logic, and is designated to control the ELS, will switch it on. The other CCs either don’t receive the ELT A/B signal or don’t have authority over the ELS, so they won’t activate it. So the correct choice is the CC that is directly connected to the ELT A/B interface and programmed to control the ELS, since it has the proper signal and control path to trigger the emergency lighting when that ELT type is used.

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