10.1 State TWO features required for a well-designed steering system - NSC Mechanical Technology Automotive - Question 10 - 2023 - Paper 1
Question 10
10.1 State TWO features required for a well-designed steering system.
10.2 FIGURE 10.2 below shows a wheel alignment angle. Answer the questions that follow.
10.2.... show full transcript
Worked Solution & Example Answer:10.1 State TWO features required for a well-designed steering system - NSC Mechanical Technology Automotive - Question 10 - 2023 - Paper 1
Step 1
State TWO features required for a well-designed steering system.
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Answer
A well-designed steering system should be:
Light and easy to control: This allows the driver to maneuver the vehicle with minimal effort.
Free from vibration and road shocks: This ensures a smooth driving experience and enhances comfort.
Step 2
Label A–C.
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Answer
A. Axle centre
B. Rear axle
C. Steering arms
Step 3
Identify angle D.
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Answer
Angle D represents the Ackermann's angle, which is crucial for ensuring that the wheels turn in the correct radius during a turn.
Step 4
What is the purpose of wheel alignment angle D?
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Answer
The purpose of wheel alignment angle D is to give variable toe-out to the front wheels on turns, which helps in improving the stability and handling of the vehicle during cornering.
Step 5
Draw a neat labelled sketch to show wheel bounce (hop).
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A sketch would typically show the wheel moving up and down, illustrating the vertical oscillation caused by unbalanced tires.
Step 6
Draw a neat labelled sketch to show wheel wobble (shimmy).
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A sketch would depict left to right movement of the wheel, demonstrating the side-to-side vibration experienced due to balance issues.
Step 7
Explain the difference between wheel wobble and wheel bounce.
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Wheel wobble refers to the side-to-side movement (vibration) of a wheel, while wheel bounce indicates the up and down movement (vibration) of a wheel. This distinction is critical for diagnosing handling issues.
Step 8
Name TWO materials that are used to coat the monolith in a catalytic convertor.
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Aluminum oxide
Platinum
Step 9
State TWO functions of EACH of the following sensors: Lambda.
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Measures the oxygen content in the exhaust gases.
Sends information to the electronic control unit (ECU) for maintaining optimal fuel mixture.
Step 10
State TWO functions of EACH of the following sensors: TPS.
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Detects the position of the throttle.
Sends data to the electronic control unit (ECU) to manage engine performance.
Step 11
State TWO functions of EACH of the following sensors: MAF.
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Measures the air flow into the engine.
Also measures the air flow temperature, relaying these details to the ECU.
Step 12
Briefly explain the operation of the common rail direct-injection system (CRDI).
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The common rail direct-injection system operates by pressurizing fuel via a high-pressure pump. This pressurized fuel is stored in a common rail before being injected directly into the combustion chamber through injectors. The injectors spray the fuel, allowing for precise control and optimal combustion.
Step 13
Explain how current is generated in an alternator.
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Current is generated in an alternator when a magnetic field is moved across the conductors within the alternator. This movement induces a voltage through electromagnetic induction, allowing the system to convert mechanical energy into electrical energy.
Step 14
State TWO tests performed on an alternator stator by using a multimeter.
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Continuity test: This checks for proper electrical connections within the stator windings.
Leakage test: This identifies any unintended paths for electricity which could indicate insulation failure.
Step 15
State TWO positions where an electrical fuel pump is placed in a modern motor vehicle.
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Inside the fuel tank: This design helps in drawing fuel easily and is insulated from external noise.
Near the engine: This location is sometimes used for inline fuel pumps to provide high-pressure delivery directly to the engine.
