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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 a crucial component in connecting electronic devices. It is usually made from a plastic base about 1.6mm thick, with thin layers of copper printed on one or both sides. The copper pathways enable electrical connections between different components mounted on the board. By routing electric current through these pathways, the PCB directs the flow of electricity, ensuring the components function together effectively. Additionally, components are soldered onto the PCB, providing stability and durability.
Step 2
Metal alloy
Answer
Metal alloys are materials made by combining two or more metals or a metal and a non-metal, such as carbon. These alloys, which include high-speed steel and stainless steel, can exhibit enhanced properties compared to their individual components. For example, certain alloys may have improved resistance to corrosion and increased strength, making them suitable for a variety of industrial applications. Their unique characteristics are determined by the proportions of the constituent elements, resulting in materials that can withstand demanding conditions.