9.1 State THREE results of a lack of preventative maintenance on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2018 - Paper 1
Question 9
9.1 State THREE results of a lack of preventative maintenance on mechanical systems.
9.2 State TWO causes of the malfunctioning of chain drive systems.
9.3 State T... show full transcript
Worked Solution & Example Answer:9.1 State THREE results of a lack of preventative maintenance on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2018 - Paper 1
Step 1
State THREE results of a lack of preventative maintenance on mechanical systems.
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Answer
Risk of injury or death due to equipment failure.
Financial loss arising from damage due to part failure and wasted materials.
Loss of valuable production time, affecting overall productivity.
Step 2
State TWO causes of the malfunctioning of chain drive systems.
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Lack of or incorrect lubrication, leading to increased friction and wear.
Misalignment of sprockets, which can hinder effective transmission of power.
Step 3
State TWO procedures to reduce wear on a belt drive system.
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Check the belt alignment regularly to ensure it runs smoothly.
Maintain proper tension on the belt to prevent slippage and excessive wear.
Step 4
Explain the procedure to replace the belt on a flat belt drive system.
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Ensure that the machine is switched off and safe to work on.
Release the tension on the belt by adjusting the tensioning mechanism.
Carefully remove the old belt from the pulleys.
Check that the pulleys are clean and aligned properly.
Fit the new belt onto the pulleys, ensuring correct alignment.
Apply adequate tension according to specifications and lock the system in place.
Step 5
State ONE property of EACH of the following materials:
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Answer
9.5.1 Polyvinyl chloride (PVC): It is flexible and rubber-like, making it suitable for various applications.
9.5.2 Carbon fibre: It is strong and lightweight, which contributes to its use in high-performance applications.
Step 6
State the main difference between thermoplastic composites and thermo-hardened (thermosetting) composites.
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Thermoplastics can be reheated and reformed, allowing for recycling, while thermosetting composites cannot be reheated after curing and are non-recyclable.
Step 7
Give TWO examples of thermo-hardened composites.
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Bakelite for electrical insulators.
Glass fibre reinforced plastics for various applications.
