Railways Technical Ability Metal Forming, Casting and Cutting Question Bank Metal Casting

  • question_answer Match List-I (Casting defects) with List-II (Explanation) and select the correct answer using the codes given below the lists:
    List-I (Casting defects) List-II (Explanation)
    A. Metallic projections    1. Consist of rounded or rough projections internal  or exposed cavities including blow holes and pin holes
    B. Cavities 2. Formed during melting, solidification and moulding
    C. Inclusions     3. Includes single folds, laps, scars adhering sand layers and oxide scale
    D. Discontinuities  4. Include cracks, cold or hot tearing and cold shuts
    5. Consist of fins, flash or massive projections ions and rough surface

    A) A\[\to \]1, B\[\to \]5, C\[\to \]3, D\[\to \]2

    B) A\[\to \]1, B\[\to \]5, C\[\to \]2, D\[\to \]4

    C) A\[\to \]5, B\[\to \]1, C\[\to \]2, D\[\to \]4

    D) A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]2

    Correct Answer: C

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