Practice question

What is the function of the Automatic Door Reversing Edge (Einklemmschutz / Sensitive edge) on passenger bus doors?

If the door encounters an obstacle (such as a boarding passenger or arm) while closing, pressure sensors or optical beams immediately reverse the door movement and reopen it to prevent injury
It cuts off the bus engine immediately
It locks the passenger's arm in place until the next stop
It takes a photograph of the passenger

Answer: A — If the door encounters an obstacle (such as a boarding passenger or arm) while closing, pressure sensors or optical beams immediately reverse the door movement and reopen it to prevent injury

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