The maximum efficiency of a square threaded screw is

(A) (1 - sinφ)/ (1 + sinφ)

(B) (1 + sinφ)/ (1 - sinφ)s

(C) (1 - sinφ)/ (1 + cosφ)

(D) (1 + cosφ)/ (1 - sinφ)

1 Answer

Answer :

(A) (1 - sinφ)/ (1 + sinφ)

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