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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 type of gear mechanism consisting of a worm gear and a wheel gear. The worm gear resembles a screw and is fixed to a drive shaft that meshes with the wheel gear, which is oriented at 90 degrees. This configuration allows for a significant reduction in speed, while simultaneously increasing torque. Because of this arrangement, a worm and wheel drive can effectively transfer power in situations requiring high torque with a compact design.
Step 2
Electrical fuse
Answer
An electrical fuse is a safety device that protects electrical circuits from overloads. It consists of a thin wire inside a glass or ceramic tube, which melts and breaks the circuit when excessive current flows through it. The primary purpose of the fuse is to ensure that the voltage levels remain safe within electrical appliances. It acts as a safeguard, cutting off the electricity supply when a fault occurs, thus preventing potential damage to the appliance and ensuring safety.