Describe THREE requirements of a well-planned steering mechanism - NSC Mechanical Technology Automotive - Question 10 - 2021 - Paper 1
Question 10
Describe THREE requirements of a well-planned steering mechanism.
A well-planned steering mechanism must have several characteristics to ensure optimal performance ... show full transcript
Worked Solution & Example Answer:Describe THREE requirements of a well-planned steering mechanism - NSC Mechanical Technology Automotive - Question 10 - 2021 - Paper 1
Step 1
10.2.1 State ONE function of EACH of the following wheel alignment angles: Positive camber
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Answer
The function of positive camber is to reduce the steering effort required by the driver. It allows the vehicle's inner wheel bearing to carry more vehicle mass, enhancing stability and control during turns.
Step 2
10.2.2 State ONE function of EACH of the following wheel alignment angles: Ackermann angle
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Answer
The function of the Ackermann angle is to allow variable toe-out on the front wheels during turns, which helps in maintaining better traction and handling.
Step 3
10.3.1 Identify the wheel alignment angle indicated by C in FIGURE 10.3.
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The wheel alignment angle indicated by C is the Negative Caster angle.
Step 4
10.3.2 Explain the purpose of wheel alignment angle C.
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The purpose of the negative caster angle is to ensure easier turning and better cornering for the vehicle. It provides improved maneuverability, especially at low speeds.
Step 5
10.3.3 Label A, B and D.
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Answer
A: King pin / Steering axis
B: Perpendicular line
D: Centre line of kingpin / Steering axis
Step 6
10.4.1 Explain the basic function of a sensor.
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Answer
The basic function of a sensor is to detect the engine operating conditions, such as temperature or pressure, and send this information to the electronic control unit (ECU) for analysis and response.
Step 7
10.4.2 Explain the basic function of an actuator.
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Answer
An actuator's basic function is to receive output signals from the ECU and make the necessary adjustments in the engine management system, such as modifying valve positions or fuel flow.
Step 8
10.5 State TWO requirements for a catalytic convertor to function effectively.
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Answer
The catalytic converter's working temperature must not exceed 600 °C.
Unleaded petrol must be used to prevent lead contamination and ensure optimal catalyst performance.
Step 9
10.6 Where is the lambda oxygen sensor fitted on an engine?
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The lambda sensor is fitted on the exhaust system.
Step 10
10.7 State THREE benefits of an adaptive speed control system fitted to a vehicle for the driver.
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Answer
It maintains a safe distance from the vehicle in front.
It provides warnings to the driver if there is a risk of a collision.
It helps prevent driver fatigue by reducing the need for constant speed adjustments.
Step 11
10.8.1 Identify the symbol in FIGURE 10.8.
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The symbol in FIGURE 10.8 is a Diode.
Step 12
10.8.2 State the function of the component identified in QUESTION 10.8.1.
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Answer
The function of the diode is to change alternating current (AC) into direct current (DC). It allows current to flow in one direction while blocking it in the opposite direction.
Step 13
10.9.1 State ONE function of the following components in the alternator: Rectifier.
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The function of the rectifier is to convert alternating current (AC) to direct current (DC) for use in charging the battery.
Step 14
10.9.2 State ONE function of the following components in the alternator: Stator.
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The stator provides a core that concentrates the magnetic lines of force onto the stator windings, which induces a voltage to charge the battery.
Step 15
10.9.3 State ONE function of the following components in the alternator: Rotor.
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The rotor provides a rotating electro-magnet, which induces an electric voltage into the stator windings for charging the battery.
Step 16
10.10 State TWO functions of the check valve in the electric fuel pump.
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It ensures the pressure in the fuel lines is maintained.
It allows fuel to flow in one direction only from the pump to the fuel tank.
