Millwright Level 1 Practice Exam

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What type of metals should copper sulphate layout solution be used on?

  1. Non-ferrous metals

  2. Ferrous metals

  3. Semi-conductive materials

  4. Plastic composites

The correct answer is: Ferrous metals

Copper sulfate layout solution is primarily used on ferrous metals. This solution serves as a method for marking or laying out lines, shapes, or specific locations for machining or fabrication processes. The copper sulfate reacts well with ferrous metals, offering visible contrast often through a color change that facilitates accurate layout and machining. Non-ferrous metals would not react in the same manner, as they do not oxidize like ferrous metals. Semi-conductive materials and plastic composites are not suitable substrates for copper sulfate layout solutions either; the chemical properties of these materials would not support the intended use of copper sulfate for layout marking. The effectiveness and visibility of marking made with copper sulfate are best exhibited when applied to ferrous metals, making this specific usage critical in milling and machining operations.

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