9.1 State THREE types of maintenance procedures used on mechanical systems. 9.2 State TWO causes of the malfunctioning of belt drive systems. 9.3 Briefly explain the procedure to replace the chain on a chain drive system. 9.4 State TWO procedures to reduce the wear on a gear drive system. 9.5 State ONE use of EACH of the following materials: 9.5.1 Nylon 9.5.2 Glass fibre/Glass fibre 9.6 Classify the following material as thermoplastic composites or thermo-hardened (thermo-setting) composites: 9.6.1 Teflon 9.6.2 Bakelite 9.7 Name any TWO factors that influence the coefficient of friction between two surfaces.

NSC Mechanical Technology Fitting and Machining Suitable preventative maintenance: 9.1 State THREE types of mainten

9.1 State THREE types of maintenance procedures used on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2019 - Paper 1

Question 9

9.1 State THREE types of maintenance procedures used on mechanical systems. 9.2 State TWO causes of the malfunctioning of belt drive systems. 9.3 Briefly explain t... show full transcript

Worked Solution & Example Answer:9.1 State THREE types of maintenance procedures used on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2019 - Paper 1

Step 1

State THREE types of maintenance procedures used on mechanical systems.

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Answer

Preventative Maintenance: Regular checks and servicing to prevent failures.
Predictive Maintenance: Monitoring equipment conditions to predict failures.
Reliable Centred Maintenance: Focusing on the reliability of the system throughout its life cycle.

Step 2

State TWO causes of the malfunctioning of belt drive systems.

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Answer

Lubrication issues between the belt and pulley, causing slippage.
Incorrect pulley alignment resulting in wear and strain.

Step 3

Briefly explain the procedure to replace the chain on a chain drive system.

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Answer

Release Tension: Start by relieving the tension on the chain and detaching it from the sprocket.
Check Condition: Inspect both the new chain and the sprockets for any alignment issues or damage.
Fit New Chain: Install the new chain according to the specified length and ensure it is properly aligned with the sprocket.
Adjust Tension: Apply the recommended tension to the chain, ensuring it operates smoothly.
Final Check: Verify that everything is in place and functioning correctly.

Step 4

State TWO procedures to reduce the wear on a gear drive system.

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Answer

Regularly check and replenish lubrication levels to ensure smooth operation.
Ensure that the gears are properly secured to the shafts to avoid unnecessary movement and wear.

Step 5

State ONE use of EACH of the following materials:

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Answer

9.5.1 Nylon: Used in the manufacturing of gears due to its durability and resistance to wear.

9.5.2 Glass fibre: Commonly utilized in the construction of boats for its lightweight and strong properties.

Step 6

Classify the following material as thermoplastic composites or thermo-hardened (thermo-setting) composites:

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Answer

9.6.1 Teflon: Classified as a thermoplastic composite due to its ability to soften upon heating.

9.6.2 Bakelite: Classified as a thermo-hardened (thermo-setting) composite, as it sets permanently once cured.

Step 7

Name any TWO factors that influence the coefficient of friction between two surfaces.

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Answer

The surface roughness of the materials in contact affects how they interlock and slide against each other.
The type and amount of lubricant present can significantly change the coefficient of friction by reducing direct contact.

9.1 State THREE types of maintenance procedures used on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2019 - Paper 1

Worked Solution & Example Answer:9.1 State THREE types of maintenance procedures used on mechanical systems - NSC Mechanical Technology Fitting and Machining - Question 9 - 2019 - Paper 1

State THREE types of maintenance procedures used on mechanical systems.

State TWO causes of the malfunctioning of belt drive systems.

Briefly explain the procedure to replace the chain on a chain drive system.

State TWO procedures to reduce the wear on a gear drive system.

State ONE use of EACH of the following materials:

Classify the following material as thermoplastic composites or thermo-hardened (thermo-setting) composites:

Name any TWO factors that influence the coefficient of friction between two surfaces.

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