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 ensures that the driver can maneuver the vehicle comfortably without excessive effort.
Free from vibration and road shocks: The design must absorb shocks from the road surface to provide 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
Angle D is known as the Ackermann angle.
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 vehicle's handling and stability during cornering.
Step 5
Draw a neat labelled sketch to show wheel bounce (hop).
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Answer
Wheel bounce (hop) can be represented as follows:
↑
Bounce
----
-----
This indicates the vertical movement of the wheel due to unbalanced wheels.
Step 6
Draw a neat labelled sketch to show wheel wobble (shimmy).
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Wheel wobble (shimmy) can be represented as follows:
_________
/ \
| Wobble |
\__________/
This illustrates the side-to-side movement of the wheel.
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, typically caused by issues like misalignment or unbalanced tires. In contrast, wheel bounce refers to the up-and-down movement (vibration) of a wheel, which is often associated with issues like suspension problems or unbalanced wheels.
Step 8
Name TWO materials that are used to coat the monolith in a catalytic convertor.
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Aluminium oxide
Platinum
Step 9
State TWO functions of EACH of the following sensors: Lambda.
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The Lambda sensor measures the oxygen content in the exhaust gases.
It sends this information to the electronic control unit (ECU) to optimize fuel injection.
Step 10
State TWO functions of EACH of the following sensors: TPS.
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Answer
The Throttle Position Sensor (TPS) detects the position of the throttle.
It provides this information to the electronic control unit (ECU) for efficient engine performance.
Step 11
State TWO functions of EACH of the following sensors: MAF.
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The Mass Air Flow (MAF) sensor measures the air flow to the engine.
It also measures the air flow temperature to assist in fuel management.
Step 12
Briefly explain the operation of the common rail direct-injection system (CRDI).
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Answer
The common rail direct-injection system (CRDI) operates as follows:
The high-pressure pump transfers fuel to a common rail at high pressure.
This rail holds and distributes the pressurized fuel to the injectors.
The injectors then spray the fuel directly into the cylinder for combustion.
Step 13
Explain how current is generated in an alternator.
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Current is generated in an alternator through electromagnetic induction. When a magnetic field is moved across the conductor (the wire coils), a voltage is induced across the ends of the conductor, converting mechanical energy into electrical energy.
Step 14
State TWO tests performed on an alternator story using a multimeter.
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Continuity test: This checks if there is a continuous path for current.
Leakage test: This tests for any unwanted current flow that could indicate faults.
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 position helps in quiet operation and efficient fuel supply.
Along the fuel line: This position allows for better fuel delivery under various pressure conditions.
