Railways Technical Ability Metrology and Inspection Question Bank Metrology and Inspection

  • question_answer Consider the following statements with respect to control charts for attributes:
    1. The lower control limit is non-negative
    2. Normal distribution is the order for this data
    3. The lower control limit is not significant
    4. These charts give the average quality characteristics
    Which of the statements given above are correct.

    A) 1, 2 and 3                     

    B) 2, 3 and 4

    C) 1, 3 and 4                     

    D) 1, 2 and 4

    Correct Answer: C


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