| What statement is true concerning the door interlock devices associated with a winding drum or traction drive passenger elevator onboard ship? |
| A) Door interlocks are used to prevent elevator operation if the doors are still open and only allow elevator operation if the doors are proved closed. |
| B) Door interlocks are used to prevent elevator operation if the doors are still closed and only allow elevator operation if the doors are proved open. |
| C) Door interlocks are used to prevent elevator operation in a shipboard emergency when elevators are not to be used. |
| D) Door interlocks are used to over-ride elevator emergency status in a shipboard emergency when elevators are required to be used. |
