10.1 State THREE pre-checks performed on the vehicle suspension before wheel alignment adjustments and checks can be done - NSC Mechanical Technology Automotive - Question 10 - 2022 - Paper 1
Question 10
10.1 State THREE pre-checks performed on the vehicle suspension before wheel alignment adjustments and checks can be done.
10.2 Draw a neat labelled sketch to expla... show full transcript
Worked Solution & Example Answer:10.1 State THREE pre-checks performed on the vehicle suspension before wheel alignment adjustments and checks can be done - NSC Mechanical Technology Automotive - Question 10 - 2022 - Paper 1
Step 1
State THREE pre-checks performed on the vehicle suspension before wheel alignment adjustments and checks can be done.
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Answer
Correct preload on the wheel (hub) bearings: Ensuring that the wheel bearings are properly adjusted to prevent uneven wear and handling issues.
Suspension ball joints for wear, locking and lifting: Checking for any play or movement that indicates wear in the ball joints, which can affect suspension geometry.
Sagged springs, which includes riding height: Assessing the condition of the springs to ensure they maintain the correct ride height and handling characteristics.
Step 2
Draw a neat labelled sketch to explain toe-out when turning to the right.
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Answer
To demonstrate toe-out when turning to the right:
Draw two wheels: Label as the 'Outer Wheel' and 'Inner Wheel'.
Show steering angles: Indicate the different steering angles where the outer wheel (20°) is more turned than the inner wheel (23°).
Label the sketch: Clearly label angles and the direction of the turn.
Step 3
State TWO suspension faults that will negatively affect toe-out on turns.
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Answer
Wear on the suspension parts: Deteriorated components can lead to improper alignment and handling, affecting toe settings negatively.
Wheel bearing wear: Worn wheel bearings can cause movement that leads to incorrect alignment, resulting in an undesired toe-out during turns.
Step 4
Explain the procedure to statically balance a wheel.
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Answer
Mount the wheel on a spindle: Ensure that it is free to spin without obstruction.
Spin the wheel slowly: Observe where it naturally comes to rest, identifying the 'heavy spot'.
Add weight: Place a small weight counterbalancing the heavy spot at the opposite side.
Repeat the process: Continue adjusting until the wheel comes to a complete stop at random positions, indicating balanced state.
Step 5
State the functions of the following systems: Air-induction system.
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Answer
The air-induction system measures and controls the air required for combustion in the engine. It ensures that the correct amount of air is taken in for efficient fuel burning.
Step 6
State the functions of the following systems: Ignition system.
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Answer
The purpose of the ignition system is to ignite the air/fuel mixture inside the combustion chamber at the correct moment to ensure efficient engine operation.
Step 7
Name the TWO toxic exhaust gases which are converted into non-toxic gases when it flows through the catalytic converter.
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Answer
Hydrocarbons (HC): These are unburned fuel components that get converted.
Carbon monoxide (CO): A harmful gas that is oxidized to harmless carbon dioxide (CO₂) during the process.
Step 8
Label A-D of the common rail direct injection (CRDI) system shown in FIGURE 10.7 below.
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Answer
A. Common rail
B. High pressure pump / pump / diesel pump
C. Diesel/fuel filter
D. Injectors
Step 9
What is the function of the pressure regulator in the fuel system?
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Answer
The pressure regulator maintains the required pressure in the fuel rail, ensuring consistent fuel delivery to the engine. It also relieves excessive pressure in the system to prevent potential damage.
Step 10
Label A and B.
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Answer
A. Rotor
B. Capacitor
Step 11
Which configuration is used to connect the stator windings?
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Answer
The connection configuration used is 'Star / Y' connected stator windings.
Step 12
How many diodes are there in the circuit?
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