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 malfunction.
Financial loss due to damage suffered as a result of part failure and waste of material.
Loss of valuable production time, impacting overall productivity.
Step 2
State TWO causes of the malfunctioning of chain drive systems.
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Answer
Lack of or incorrect lubrication leading to excessive wear and tear.
Overloading the system, resulting in component failure.
Step 3
State TWO procedures to reduce wear on a belt drive system.
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Answer
Regularly check the belt alignment and tension to ensure optimal performance.
Keep the pulleys clean and ensure that all covers are secure to protect components from debris.
Step 4
Explain the procedure to replace the belt on a flat belt drive system.
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Answer
Ensure that the machine is switched off to prevent accidents.
Release the tension on the belt to make removal easier.
Carefully remove the existing belt from the pulleys.
Check the pulley alignment for any misalignment that needs correction.
Install the new belt, making sure it fits correctly over the pulleys.
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):
Flexible and rubber-like substance, durable for various applications.
9.5.2 Carbon fibre:
Strong and lightweight, making it ideal for structural applications.
Step 6
State the main difference between thermoplastic composites and thermo-hardened (thermosetting) composites.
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Answer
Thermoplastics can be reheated and deformed, making them recyclable, while thermo-hardened composites cannot be reheated and are non-recyclable.
Step 7
Give TWO examples of thermo-hardened composites.
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