QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State FIVE factors that need to be taken into account before any wheel alignment adjustments can be done - NSC Mechanical Technology Automotive - Question 10 - 2018 - Paper 1
Question 10
QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State FIVE factors that need to be taken into account before any wheel a... show full transcript
Worked Solution & Example Answer:QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State FIVE factors that need to be taken into account before any wheel alignment adjustments can be done - NSC Mechanical Technology Automotive - Question 10 - 2018 - Paper 1
Step 1
10.1 State FIVE factors that need to be taken into account before any wheel alignment adjustments can be done.
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Answer
Kerb Mass: Ensure the load (including fuel and spare items) matches the manufacturer's specifications.
Tyre Pressure: Check and adjust the tyre pressure to recommended levels.
Even Wear on Tyres: Inspect for uneven wear patterns that could affect alignment.
Suspension Components: Examine suspension parts for wear, including bushings and joints.
Steering Components: Ensure that components such as tie rods and bearings are in good condition.
Step 2
10.2.1 Identify the wheel alignment drawing in FIGURE 10.2.
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Answer
The wheel alignment drawing in FIGURE 10.2 represents the concept of wheel alignment angles, specifically focusing on toe angle (toe-in or toe-out) as it affects vehicle handling.
Step 3
10.2.2 Label A–G.
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A - Contact point of kingpin centre line
B - Kingpin
C - Perpendicular line / vertical line / normal line
D - Negative caster angle
E - Centre line of kingpin
F - Front of vehicle / Direction of wheel motion
G - Point of wheel contact
Step 4
10.2.3 Define the wheel alignment angle, as indicated in FIGURE 10.2.
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Answer
The wheel alignment angle refers to the angle at which wheels are positioned relative to the vehicle's centerline, ensuring proper contact with the road for optimal handling and traction.
Step 5
10.3 Use a labelled sketch to show toe-out of the front wheels of a vehicle.
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Answer
In the sketch, the front wheels of the vehicle should point outward, away from the centerline, showing 'toe-out' alignment. Label the wheels and indicate the front of the vehicle.
Step 6
10.4 State the purpose of kingpin inclination.
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The purpose of kingpin inclination is to align the front wheels for better handling and stability, bringing them back to a straight-ahead position while reducing drag during turns.
Step 7
10.5 State TWO chemical processes on which the operating principle of the catalytic converter is based.
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Oxidation: The process of converting carbon monoxide (CO) to carbon dioxide (CO₂).
Reduction: The conversion of nitrogen oxides (NOx) into nitrogen (N₂) and oxygen (O₂).
Step 8
10.6 Describe the purpose of the speed-control system fitted to a motor vehicle.
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The speed-control system controls the throttle opening of the vehicle, maintaining a constant speed and assisting drivers in managing their speed without manual intervention.
Step 9
10.7 State TWO advantages of the speed-control system fitted to a motor vehicle.
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Reduced Driver Fatigue: Helps prevent constant acceleration adjustments on long drives.
Improved Fuel Consumption: Maintains a steady speed, enhancing fuel efficiency.
Step 10
10.8 What is the purpose of the pressure regulator in the fuel system of a motor vehicle?
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The pressure regulator ensures consistent fuel pressure in the system, adjusting it in relation to manifold pressure for optimal engine performance.
Step 11
10.9 State TWO methods to increase the output frequency of an alternator to increase the current output.
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Answer
Increase the Rotational Speed: Boost the engine speed to rotate the alternator faster.
Increase the Turns of Wire: Modify the windings to enhance magnetic field interactions.
Step 12
10.10 State ONE function of the stator and rotor windings in an alternator.
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The stator generates electrical current through electromagnetic induction as the rotor spins within the magnetic field.
Step 13
10.11 Function of rotor assembly in an alternator.
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The rotor assembly functions to create a rotating magnetic field that induces current in the stator windings.
