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Explain any two of the following: Printed circuit board (PCB), Metal alloy, Knurling, Worm and worm wheel. - Leaving Cert Engineering - Question 1 - 2015
Question 1
Explain any two of the following: Printed circuit board (PCB), Metal alloy, Knurling, Worm and worm wheel.
Worked Solution & Example Answer:Explain any two of the following: Printed circuit board (PCB), Metal alloy, Knurling, Worm and worm wheel. - Leaving Cert Engineering - Question 1 - 2015
Step 1
Printed circuit board (PCB)
Answer
A printed circuit board (PCB) serves as the foundation for connecting electrical components. Typically, it is crafted from a non-conductive material, often a plastic base that is around 1.6 mm thick, with conductive pathways made from copper. The design enables components to be arranged systematically across the board, facilitating connections through soldering. The strips of copper interconnect different components, allowing electrical signals to flow smoothly between them.
Step 2
Knurling
Answer
Knurling is a mechanical process used to create a patterned texture on the surface of an object, primarily to improve grip. This is often accomplished by rolling a knurling tool over the workpiece in either a diamond or straight pattern. The embossed pattern enhances the tactile quality, making it easier to hold. Typically, knurling is performed while the material is being lathe-turned at a specified speed, resulting in a durable and functional surface finish that is beneficial in applications where manual handling is required.