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				| 1. | A multiple-threaded screw has a pitch of screw 4mm and if the screw is made to 5 revolutions the screw will advances to 40 mm. What type of screw is it? | 
| A. | Single-threaded screw | 
| B. | Double threaded screw | 
| C. | Triple-threaded screw | 
| D. | Four –threaded screw | 
| Answer» C. Triple-threaded screw | |