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 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? Correct Answer Double threaded screw

5 revolutions = 40 mm, 1 revolution = 40mm/5 = 8 mm. Given pitch of the screw is 4 mm that is a pitch of the helix is equal to two times of pitch of the screw. So the screw used here is double-threaded screw.

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