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
The steering system should be light and easy to control, allowing the driver to maneuver the vehicle effortlessly.
It must be free from vibrations and shocks, ensuring a smooth driving experience.
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
D. Ackermann's angle
Step 4
What is the purpose of wheel alignment angle D?
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The purpose of wheel alignment angle D is to give variable toe-out to the front wheels on turns, enhancing steering control and tire wear.
Step 5
Draw a neat labelled sketch to show wheel bounce (hop).
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A sketch should depict a wheel bouncing vertically, showing its upward and downward motion (bounce).
Step 6
Draw a neat labelled sketch to show wheel wobble (shimmy).
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A sketch should depict a wheel moving side to side, illustrating the vibrations characteristic of wheel wobble.
Step 7
Explain the difference between wheel wobble and wheel bounce.
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Wheel wobble is the side-to-side movement or vibration of a wheel caused by misalignment or imbalance, while wheel bounce refers to the up-and-down movement of a wheel typically due to uneven road surfaces or suspension issues.
Step 8
Name TWO materials that are used to coat the monolith in a catalytic convertor.
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Platinum
Rhodium
Step 9
State TWO functions of EACH of the following sensors: Lambda.
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Answer
The lambda sensor measures the oxygen content in the exhaust gases.
It sends this information to the engine control unit (ECU) for optimizing fuel mixture.
Step 10
State TWO functions of EACH of the following sensors: TPS.
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The throttle position sensor (TPS) detects the position of the throttle.
It sends this data to the ECU to help regulate air intake.
Step 11
State TWO functions of EACH of the following sensors: MAF.
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The mass air flow (MAF) sensor measures the amount of air entering the engine.
It also measures the air flow temperature to optimize the air-fuel mixture.
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 delivering high-pressure fuel from a central rail to individual injectors. These injectors spray the fuel directly into the cylinder for efficient combustion. The system allows for precise control of injection timing and quantity, enhancing performance and fuel efficiency.
Step 13
Explain how current is generated in an alternator.
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Current is generated in an alternator when a magnetic field moves across the conductors within the alternator. This movement induces a voltage due to electromagnetic induction, converting mechanical energy into electrical energy.
Step 14
State TWO tests performed on an alternator stator using a multimeter.
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Continuity test to ensure there are no breaks in the windings.
Leakage test to check for 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 to ensure a consistent supply of fuel under pressure.
In the engine bay to provide high-pressure fuel directly to the engine's fuel rail.
