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  1. The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

    2. A.
    α = 45° +
    B.
    α = 45° -
    C.
    α = 90° + φ
    D.
    α = 90° - φ

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    Workspace

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    Answer : Option B

    Explanation :

    No answer description available for this question.

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