500 Final

If the ratio of movement between a synchronous selector and the elevator car is 60 to 1, how far will the selector move if the car travels 30 feet? {Ans: } 6 inchesWhat device is installed to hold the vertically biparting freight doors mechanically closed? {Ans: } KeeperWhich of the following statements is correct regarding single-section swing doors used as emergency exits for blind hoistways? {Ans: } The doors must be self-closing and self-locking, a unique key, and switch to prevent elevator operations when open.When setting up a retiring cam for a freight elevator, which of the following statements is correct? {Ans: } The cam must apply a force that is double what's required for normal interlock operationRefer to Figure 1: What contact or contacts are closed when the doors are closing and you have reached the first slow down? {Ans: } 1 onlyWhat does the symbol shown below represent? {Ans: } GroundHow many turns of safety rope must remain on the safety drum after a rated load and rated speed test of a winding drum operated safely? {Ans: } 3What is the maximum force allowed during the passenger door closing cycle to prevent a door at rest from closing?