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Explain any two of the following: Printed Circuit Board (PCB), Rack and pinion, Parting-off tool, Variable resistor. - Leaving Cert Engineering - Question I - 2018
Question I
Explain any two of the following: Printed Circuit Board (PCB), Rack and pinion, Parting-off tool, Variable resistor.
Worked Solution & Example Answer:Explain any two of the following: Printed Circuit Board (PCB), Rack and pinion, Parting-off tool, Variable resistor. - Leaving Cert Engineering - Question I - 2018
Step 1
Printed Circuit Board (PCB)
Answer
A Printed Circuit Board (PCB) is a thin board made of fiberglass, composite epoxy, or other insulating materials. It has conductive pathways that are etched or 'printed' onto the board, connecting different electronic components such as transistors, resistors, and integrated circuits. PCBs are integral to the functioning of both desktop and laptop computers, as they provide the physical foundation and electrical connections for circuit assemblies.
Step 2
Rack and pinion
Answer
A rack and pinion is a gear mechanism where the rotary motion of the pinion gear is converted into linear motion of the rack. This setup allows the rack to move in a straight line when the pinion rotates. It is commonly used in various applications, including steering systems in vehicles and in machinery, where it can be used to move the table of a drilling machine up or down.