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Explain any two of the following: Light dependent resistor (LDR), Compressor, Engraving, Self-locking nut. - Leaving Cert Engineering - Question 1 - 2014
Question 1
Explain any two of the following: Light dependent resistor (LDR), Compressor, Engraving, Self-locking nut.
Worked Solution & Example Answer:Explain any two of the following: Light dependent resistor (LDR), Compressor, Engraving, Self-locking nut. - Leaving Cert Engineering - Question 1 - 2014
Step 1
Light dependent resistor (LDR)
Answer
A light dependent resistor (LDR) is a type of resistor whose resistance changes based on the light intensity that falls upon it. When the light levels are high, the resistance is low, allowing more current to flow through. Conversely, in darkness, the resistance increases significantly, reducing current flow. LDRs are commonly used in applications such as light sensors, automatic lighting, and alarm systems, allowing devices to respond dynamically to changes in surrounding light.
Step 2
Compressor
Answer
A compressor is a mechanical device that takes in air from its surroundings and compresses it, storing it under pressure in a reservoir tank. This pressurized air can then be utilized to power various tools and equipment, such as pneumatic tools, spray painting equipment, and other devices that require a source of compressed air. Compressors are vital in many industrial and construction applications, enhancing efficiency and productivity.