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Answer any three of the following: (i) Suggest two benefits of using grease over oil to lubricate mechanisms - Leaving Cert Engineering - Question b - 2021
Question b
Answer any three of the following: (i) Suggest two benefits of using grease over oil to lubricate mechanisms. (ii) Identify one use for the toggle mechanism shown ... show full transcript
Worked Solution & Example Answer:Answer any three of the following: (i) Suggest two benefits of using grease over oil to lubricate mechanisms - Leaving Cert Engineering - Question b - 2021
Step 1
Suggest two benefits of using grease over oil to lubricate mechanisms.
Answer
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Viscous Nature: Grease is more viscous than oil, which allows it to stay in place longer and provides a more effective lubrication layer that helps protect moving parts from wear and corrosion.
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Sealing Properties: Grease can seal some parts of mechanisms, which prevents contaminants such as dust and dirt from entering, thereby prolonging the lifespan and efficiency of the machine.
Step 2
Step 3
Describe, with the aid of a diagram, the operation of an idler gear.
Answer
Idler gears are used to change the direction of a gear train. They ensure that the driver and driven gears rotate in the same direction, facilitating smooth transmission of motion without altering the speed ratio.
Diagram: (Insert diagram showing idler gear positioning in a simple gear train)
In the diagram, you will see the driver gear connected to the idler gear, which in turn is connected to the driven gear. This arrangement allows the rotation of the driver to affect the driven gear without changing the speed.