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A multiple-threaded screw is designed in such a way for one complete rotation of screw advances to a distance of 5 times the pitch of the screw. If need to make the lead only up to 3 times of the pitch of screw then how many angles should we rotate the screw?

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A multiple-threaded screw is designed in such a way for one complete rotation of screw advances to a distance of 5 times the pitch of the screw. If need to make the lead only up to 3 times of the pitch of screw then how many angles should we rotate the screw?

(a) 214 degrees

(b) 216 degrees

(c) 120 degrees

(d) 72 degrees

I got this question in an internship interview.

Question is from Construction of Screw Threads topic in portion Curves used in Engineering Practice of Engineering Drawing

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Right choice is (b) 216 degrees

Easiest explanation: Given that, for one complete rotation the screw advances to a distance of 5 times the pitch of screw but we need only 3 times the pitch of the screw. Total rotation is 360 degrees. 360 x 3/5 = 216 degrees.

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