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A double–threaded screw is made _____ revolutions. The pitch of the screw is 6 mm and the screw advanced to 6 cm.

A double–threaded screw is made _____ revolutions. The pitch of the screw is 6 mm and the screw advanced to 6 cm. Correct Answer 5

Pitch of the screw is 6 mm given screw is double-threaded so for one revolution the screw advances to 6 mm x 2 = 12 mm. But the screw advanced to 6 cm = 60 mm. Number of revolutions = total screw advancement/ screw advancement for single revolution = 60 /12 = 5.

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