In the progression of regeneration indicated by lamps, which stage is described as second stage (flashing)?

• A. first stage
• B. second stage
• C. third stage
• D. fourth stage

Answer: (B)

Progress indicators use distinct lamp patterns to communicate where the regeneration cycle stands. A flashing lamp is a clear cue that the process is actively underway and not yet finished, which matches the second stage designation. The first stage would typically show a steady indicator signaling initiation, while later stages use other patterns or steady states to show completion or a different status. Since this item specifies that the second stage is the flashing one, that is the correct mapping. When you see flashing, you know the regeneration is in progress and you should monitor the system as it moves toward the next stage.