Which of the following is NOT a manufacturing process commonly used in engineering?

The correct choice highlights that electronic assembly is not primarily classified as a manufacturing process in the traditional sense like the other options. While it is crucial in the production of electronic components and devices, it focuses more on the assembly of pre-manufactured parts rather than the creation or fabrication of those parts themselves.

In contrast, casting, machining, and 3D printing are all significant manufacturing processes that involve the transformation of raw materials into finished products.

• Casting involves pouring molten material into a mold to create a specific shape as it cools and solidifies.

• Machining includes various processes like cutting, drilling, and milling, which remove material from a solid block to achieve desired dimensions and finishes.

• 3D printing allows for additive manufacturing where materials are layered to build complex shapes that might be difficult to achieve through traditional methods.

These three options involve direct manufacturing techniques that change the form of materials, whereas electronic assembly is more about putting together components rather than manufacturing the components themselves.