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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 Automotive - Question 8 - 2017 - Paper 1
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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. 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 Automotive - 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 offers several advantages over regular oil when machining materials on a centre lathe.
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Prevention of Chip Sticking: Cutting fluid effectively prevents the shavings or metal chips from sticking to the cutting tool, thereby enhancing tool life and performance.
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Heat Management: It effectively carries away heat generated during the turning process, which can otherwise lead to thermal expansion and possible warping of the workpiece.
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Finish Quality: The use of cutting fluid improves the quality of the finished surface, facilitating smoother cuts and a more desirable finish.
Step 2
Describe what will happen if the engine oil in a vehicle is not changed regularly.
Answer
Failing to change the engine oil regularly can lead to several detrimental effects:
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Formation of Sludge: Over time, oil degrades and can form sludge, which coats engine components and reduces lubrication efficiency.
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Increased Viscosity: Engine oil loses viscosity as it accumulates contaminants, which can hinder its ability to effectively lubricate moving parts.
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Damage to Components: Lack of proper lubrication can lead to increased wear and tear on engine components, potentially resulting in engine failure.
Step 3
Step 4
Step 5
Name THREE properties of grease.
Answer
- Water Resistance: Grease must be resistant to water to prevent washing away or dilution.
- Corrosion Resistance: It should resist rust and corrosion to protect metal surfaces.
- High Melting Point: Grease should maintain its consistency at high temperatures.
Step 6
State TWO functions of a clutch plate and pressure plate in the clutch and pressure plate assembly.
Answer
- Friction Production: The clutch plate provides the necessary friction between the clutch disc and pressure plate to engage and disengage the vehicle's power transmission.
- Connection: It connects the flywheel to the gearbox shaft, facilitating the power transfer from the engine to the transmission.