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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) is a crucial component in electronic devices, serving as the backbone for connecting various electric components. Typically, a PCB is made from a plastic base, approximately 1.6mm thick, onto which conductive pathways are etched. These pathways allow electric current to flow between various components, such as resistors and capacitors, which are mounted onto the board. The layout of these pathways is designed to ensure minimal interference and optimal performance. Additionally, PCBs can vary in complexity, from single-sided boards to multi-layer designs that allow for more compact electronic devices.
Step 2
Metal alloy
Answer
A metal alloy is a combination of two or more metals, or a metal and a nonmetal, which is engineered to enhance specific properties. For instance, high-speed steel and stainless steel are notable examples that exhibit improved strength, corrosion resistance, and durability compared to their base metals. The addition of elements like tungsten or chromium can enhance the ability to withstand heat or wear, making these alloys suitable for a wide range of applications, from manufacturing tools to structural components in various industries.