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Discussion :: Workshop Technology

  1. A basic hole is one whose

  2. A.

     Lower deviation is zero

    B.

     Upper deviation is zero

    C.

     Lower and upper deviations are zero

    D.

     None of these

    View Answer

    Workspace

    Answer : Option A

    Explanation :

    A basic hole is one whose Lower deviation is zero
    Upper Deviation: It is the algebraic difference between the maximum size and the basic size. The upper deviation of a hole is represented by a symbol ES and of a shaft, it is represented by es.
    Lower Deviation: It is the algebraic difference between the minimum size and the basic size.


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