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Explain any two of the following: Worm and wheel drive, Electrical fuse, Morse taper sleeve, Plastic dip coating. - Leaving Cert Engineering - Question 1 - 2010
Question 1
Explain any two of the following: Worm and wheel drive, Electrical fuse, Morse taper sleeve, Plastic dip coating.
Worked Solution & Example Answer:Explain any two of the following: Worm and wheel drive, Electrical fuse, Morse taper sleeve, Plastic dip coating. - Leaving Cert Engineering - Question 1 - 2010
Step 1
Worm and wheel drive
Answer
A worm and wheel drive is a gear system that consists of two main components: a worm gear and a wheel gear. The worm gear, which resembles a screw thread, is fixed to a drive shaft. When the worm gear is rotated, it turns the wheel gear, which is oriented at a 90-degree angle to the worm. This mechanism allows for significant speed reduction and increased torque output. Thus, the worm and wheel drive is suitable for applications that require a high gear reduction with minimal backlash.
Step 2
Electrical fuse
Answer
An electrical fuse is a safety device that protects electrical circuits by preventing overloads. It typically consists of a thin wire encased in a glass or ceramic tube. The fuse is designed to melt and break the circuit if excessive current flows through it, thereby 'blowing' the fuse. This action stops the electricity supply to the appliance, protecting it from damage due to overcurrent conditions.