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				| 1. | The_double-threaded_screw_is_made_to_rotate_one_complete_rotation_the_screw_advanced_to_10_mm._Lead_(pitch_of_helix)_is_given_as_10_mm._The_pitch_of_the_screw_is_____$ | 
| A. | 10 mm | 
| B. | 5 mm | 
| C. | 1 mm | 
| D. | 12 mm | 
| Answer» C. 1 mm | |