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				| 1. | A triple –threaded screw is made 4 revolutions. What is the pitch of screw if the screw advances to 6 cm?$ | 
| A. | 24 mm | 
| B. | 5 mm | 
| C. | 1 cm | 
| D. | 5 cm | 
| Answer» C. 1 cm | |