9.1 State TWO consequences of a lack of preventative maintenance of mechanical drive systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2021 - Paper 1
Question 9
9.1 State TWO consequences of a lack of preventative maintenance of mechanical drive systems.
9.2 Give TWO reasons for the malfunctioning of chain drives.
9.3 Stat... show full transcript
Worked Solution & Example Answer:9.1 State TWO consequences of a lack of preventative maintenance of mechanical drive systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2021 - Paper 1
Step 1
State TWO consequences of a lack of preventative maintenance of mechanical drive systems.
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Increased risk of system failure, which can lead to safety hazards.
Financial losses due to repairs and unplanned downtime.
Step 2
Give TWO reasons for the malfunctioning of chain drives.
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Improper tensioning, which can cause slipping or excessive wear on the chain.
Lack of lubrication, leading to friction and heat that deteriorates the chain and sprockets.
Step 3
State TWO procedures that can be followed to reduce the wear on a gear drive system.
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Regular lubrication of the gears to minimize friction and wear.
Ensuring proper alignment of the gears to avoid undue stress on the teeth.
Step 4
State TWO properties of EACH of the following materials:
9.4.1 Polyvinyl chloride (PVC)
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Can be reheated and reshaped, making it versatile for various applications.
Is lightweight and has good water resistance.
Step 5
State TWO properties of EACH of the following materials:
9.4.2 Carbon fibre
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High strength-to-weight ratio, making it ideal for applications where lightweight materials are crucial.
Excellent resistance to corrosion, providing longevity in harsh environments.
Step 6
State TWO properties of EACH of the following materials:
9.4.3 Bakelite
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Excellent electrical insulation properties, making it suitable for electrical applications.
High thermal resistance, allowing it to maintain structural integrity under heat.
Step 7
Classify the following materials as thermoplastic composites or thermo-hardened (thermosting) composites:
9.5.1 Vesconite
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Thermo-hardened composite
Step 8
Classify the following materials as thermoplastic composites or thermo-hardened (thermosting) composites:
9.5.2 Glass fibre
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Thermo-hardened composite
Step 9
Classify the following materials as thermoplastic composites or thermo-hardened (thermosting) composites:
9.5.3 Carbon fibre
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Thermo-hardened composite
Step 10
Name ONE use of EACH of the following materials:
9.6.1 Teflon
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Used in non-stick cookware.
Step 11
Name ONE use of EACH of the following materials:
9.6.2 Carbon fibre
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Used in the construction of lightweight sporting equipment.
Step 12
Name ONE use of EACH of the following materials:
9.6.3 Nylon
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