Photo AI
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 used to connect electric components together in electronic devices. Typically, a PCB is made from a thin layer of insulated material, usually plastic, around 1.6mm thick, with a conductive layer of copper on one side. The design of a PCB involves routing electrical pathways that connect various components, allowing electric current to flow between them.
Components such as resistors, capacitors, and integrated circuits are mounted and soldered onto the PCB, establishing firm connections. The strategic layout of these pathways is essential for minimizing interference and maximizing performance in the final electronic product.
Step 2
Metal alloy
Answer
A metal alloy is defined as a combination of two or more metals, or a metal and a non-metal such as carbon. Common examples include high-speed steel and stainless steel, which are specially engineered to obtain unique properties. For instance, alloys can exhibit increased strength, resistance to corrosion, and improved hardness compared to pure metals.
The specific blend of metals in an alloy is chosen to enhance particular characteristics based on the intended application, such as better machinability, ductility, or wear resistance, making alloys versatile materials in various industries.