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Advanced Manufacturing Flashcards

7 cards from real BME practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. In computer-aided process planning (CAPP), the variant approach works by:

    Answer: Retrieving and modifying an existing plan for a similar part using group technology

    The variant CAPP approach classifies the new part into a family, retrieves the standard plan for that family, then modifies it to suit the specific part's requirements.

  2. During deep drawing of sheet metal, wrinkling of the flange is typically prevented by:

    Answer: Applying a blank holder force to keep the flange flat

    A blank holder applies a controlled force to the sheet flange, suppressing compressive instability that would otherwise cause wrinkling as the material flows inward.

  3. Which machining process is best suited for producing highly accurate flat reference surfaces on cast iron machine tool bases?

    Answer: Surface grinding

    Surface grinding uses a rotating abrasive wheel traversing the workpiece, achieving flatness tolerances and surface finishes unattainable by milling on hardened machine tool components.

  4. What does a high process capability index (Cpk > 1.67) indicate about a manufacturing process?

    Answer: The process mean is well-centered and variation is well within specification limits

    A Cpk above 1.67 means the process distribution fits comfortably within specification limits with ample margin, corresponding to fewer than 0.6 defects per million opportunities.

  5. In laser beam machining (LBM), the parameter most directly controlling the depth of material removed per pulse is:

    Answer: Peak power density (irradiance) at the workpiece surface

    Peak power density (W/cm²) determines whether the threshold for ablation, melting, or vaporization is exceeded and how deeply each pulse penetrates the material.

  6. Which of the following is the correct sequence of operations in investment casting?

    Answer: Create wax pattern → build ceramic shell → dewax → pour metal

    Investment casting begins with a wax pattern, which is coated in ceramic slurry to build the shell, then the wax is melted out (lost-wax), and finally molten metal is poured.

  7. What is the primary purpose of applying a TiN (titanium nitride) coating to a high-speed steel cutting tool?

    Answer: Improving hardness, wear resistance, and reducing friction at the cutting edge

    TiN coatings provide a hard, low-friction surface on the tool, reducing flank wear and built-up edge formation, significantly extending tool life.