9.1 Preventative maintenance can be divided into two subgroups - NSC Mechanical Technology Fitting and Machining - Question 9 - 2023 - Paper 1
Question 9
9.1 Preventative maintenance can be divided into two subgroups. Name the TWO subgroups.
9.2 State THREE advantages of belt drives compared to gear drives.
9.3 Name... show full transcript
Worked Solution & Example Answer:9.1 Preventative maintenance can be divided into two subgroups - NSC Mechanical Technology Fitting and Machining - Question 9 - 2023 - Paper 1
Step 1
Preventative maintenance can be divided into two subgroups. Name the TWO subgroups.
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Answer
The two subgroups of preventative maintenance are:
Planned or scheduled maintenance: This involves routine checks and services based on a predetermined schedule to ensure equipment functions efficiently.
Conditional-based maintenance: This type of maintenance is performed based on the condition of the equipment, monitored through various diagnostics and indicators.
Step 2
State THREE advantages of belt drives compared to gear drives.
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Answer
The three advantages of belt drives over gear drives are:
Lower Noise and Vibration: Belt drives produce less noise and vibration compared to gear drives, enhancing operational comfort.
Cost-Effectiveness: Belt drives generally have a lower initial cost and require less maintenance, making them a more economical choice.
Slip Under Sudden Load: In the event of a sudden overload, belt drives can slip and thus protect the drive system, which is not possible with gear drives.
Step 3
Name THREE types of belt drives.
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Answer
Three types of belt drives include:
V-pulley Belt Drive: Utilizes a V-shaped belt that fits into the grooves of a V-pulley.
Flat Belt Drive: A straightforward belt without grooves, ideal for transmitting power over long distances.
Multi-groove Belt Drive: Features multiple grooves to increase surface contact and power transmission capability.
Step 4
Which material is commonly used for non-stick coatings on frying pans?
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The material commonly used for non-stick coatings on frying pans is Teflon.
Step 5
State TWO uses of EACH of the following composites: Polyvinyl chloride (PVC)
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Answer
Two uses of Polyvinyl chloride (PVC) include:
Trays for Food and Toiletries: Used for packaging and storing food products.
Electrical Pipes: Commonly employed in plumbing and electrical applications due to its corrosion resistance.
Step 6
State TWO uses of EACH of the following composites: Bakelite
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Answer
Two uses of Bakelite include:
Electrical Insulators: Used in various electrical applications due to its high insulation properties.
Kitchenware: Commonly found in utensils and cookware due to its heat resistance.
Step 7
State TWO uses of EACH of the following composites: Fibreglass
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Answer
Two uses of Fibreglass include:
Surface Covering: Used to reinforce structures and for aesthetic purposes on buildings and boats.
Pillow Stuffing: Employed in cushions and bedding due to its lightweight and durability.
Step 8
State whether EACH of the following materials is a thermo-hardened or a thermoplastic composite: Carbon fibre
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Answer
Carbon fibre is classified as a thermo-hardened (thermosetting) composite.
Step 9
State whether EACH of the following materials is a thermo-hardened or a thermoplastic composite: Nylon
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Nylon is classified as a thermoplastic composite.
Step 10
State whether EACH of the following materials is a thermo-hardened or a thermoplastic composite: Bakelite
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Bakelite is classified as a thermo-hardened (thermosetting) composite.
