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8.1 Describe in detail the effectiveness of cutting fluid as compared to oil when turning a work piece on a centre lathe - NSC Mechanical Technology Fitting and Machining - Question 8 - 2017 - Paper 1
Question 8
8.1 Describe in detail the effectiveness of cutting fluid as compared to oil when turning a work piece on a centre lathe. 8.2 Describe what will happen if the engin... show full transcript
Worked Solution & Example Answer:8.1 Describe in detail the effectiveness of cutting fluid as compared to oil when turning a work piece on a centre lathe - NSC Mechanical Technology Fitting and Machining - Question 8 - 2017 - Paper 1
Step 1
Describe in detail the effectiveness of cutting fluid as compared to oil when turning a work piece on a centre lathe.
Answer
Cutting fluid serves several crucial functions when working with a centre lathe:
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Prevention of Metal Chips: It prevents shavings or metal chips from sticking and fusing to the cutting tool, which is essential for maintaining tool integrity and performance.
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Heat Removal: Cutting fluid effectively carries away heat generated during the turning process. This is pivotal because excessive heat can damage both the workpiece and the cutting tool, leading to premature wear.
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Surface Finish Improvement: The use of cutting fluid improves the quality of the finish on the turned surface, resulting in a more refined product.
In comparison, oil may not provide all these benefits efficiently. While oil can lubricate, it may not carry away heat as effectively as dedicated cutting fluids, which are specifically formulated for machining processes.
Step 2
Describe what will happen if the engine oil in a vehicle is not changed regularly.
Answer
If engine oil in a vehicle is not changed regularly, several detrimental effects may occur:
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Formation of Gum and Acids: Over time, the oil can accumulate gum, acids, and lacquer, which can coat engine surfaces and hinder effective lubrication.
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Viscosity Loss: The oil's viscosity may decrease due to excessive heat and contaminant absorption, leading to reduced efficiency in lubricating engine components.
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Metal Particle Deposit: As the oil degrades, it can lead to metal particles depositing inside the engine, exacerbating wear and tear on critical parts.
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Engine Damage: Ultimately, this can result in serious engine issues, reducing the vehicle's performance and longevity.
Step 3
Step 4
Name THREE properties of grease.
Answer
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Water Resistance: Grease is designed to withstand water exposure without losing its lubricating properties.
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High Melting Point: Grease can maintain its consistency and functionality even at high temperatures.
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Low Freezing Point: It remains effective at low temperatures, ensuring lubrication in cold conditions.
Step 5
State TWO functions of a clutch plate and pressure plate in the clutch and pressure plate assembly.
Answer
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Friction Provision: The clutch plate provides friction between the clutch and pressure plate to engage and disengage the engine from the drivetrain.
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Connection of Components: It connects the flywheel to the gearbox shaft, allowing for smooth power transmission between the engine and the wheels.