Which braking is irretrievable by activation of the red mushroom button?

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Multiple Choice

Which braking is irretrievable by activation of the red mushroom button?

Explanation:
When you press the red mushroom button, the system springs into emergency braking. This is designed for urgent hazards and uses maximum deceleration. Once emergency braking is activated, you can’t undo it just by releasing the button; the train must come to a stop and then be reset by authorized personnel before normal operation can resume. The other braking modes—regular service braking or any special braking profiles—are not initiated by this button and can be concluded or overridden through normal control, which is why they aren’t described as irretrievable.

When you press the red mushroom button, the system springs into emergency braking. This is designed for urgent hazards and uses maximum deceleration. Once emergency braking is activated, you can’t undo it just by releasing the button; the train must come to a stop and then be reset by authorized personnel before normal operation can resume. The other braking modes—regular service braking or any special braking profiles—are not initiated by this button and can be concluded or overridden through normal control, which is why they aren’t described as irretrievable.

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