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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 an electronic component that alters its resistance based on the intensity of light falling on it. In bright light conditions, the resistance of an LDR decreases significantly, allowing more current to flow through. Conversely, in dark conditions, the resistance is high, limiting the current. This characteristic makes LDRs useful in various applications, such as light detection in automatic street lights and light-sensitive alarms.
Step 2
Compressor:
Answer
A compressor is a mechanical device that draws in air from its surroundings and compresses it, storing it under pressure in a reservoir tank. The compressed air can then be utilized for various purposes, including powering pneumatic tools, spray painting, and inflating tires. Compressors are vital in industries that require pneumatic power, and they ensure that tools operate efficiently and effectively by providing an adequate supply of pressurized air.