QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State ONE cause of the following tyre wear:
10.1.1 Feathering
10.1.2 One side of the thread worn excessively
10.2 State TWO requirements of a well-designed steering mechanism - NSC Mechanical Technology Automotive - Question 10 - 2019 - Paper 1
Question 10
QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State ONE cause of the following tyre wear:
10.1.1 Feathering
10.1.2 O... show full transcript
Worked Solution & Example Answer:QUESTION 10: SYSTEMS AND CONTROL (AXLES, STEERING GEOMETRY AND ELECTRONICS) (SPECIFIC)
10.1 State ONE cause of the following tyre wear:
10.1.1 Feathering
10.1.2 One side of the thread worn excessively
10.2 State TWO requirements of a well-designed steering mechanism - NSC Mechanical Technology Automotive - Question 10 - 2019 - Paper 1
Step 1
State ONE cause of the following tyre wear: 10.1.1 Feathering
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One cause of feathering is improper wheel alignment, leading to uneven tire contact with the road surface.
Step 2
State ONE cause of the following tyre wear: 10.1.2 One side of the thread worn excessively
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Excessive wear on one side of the tire can be caused by camber misalignment, where the wheel tilts inwards or outwards.
Step 3
State TWO requirements of a well-designed steering mechanism: 10.2
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A well-designed steering mechanism must be:
Self-centering to ensure stable control when driving straight.
Free from vibration and road shocks to enhance driver comfort.
Step 4
Label A–E: 10.3.1
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The labels are as follows:
A – Offset/strut radius/pivot angle radius
B – Wheel centre line
C – Steering axis centre line/King-pin centre line
D – King pin inclination angle
E – Extended centre lines from steering arms.
Step 5
Define the king-pin inclination: 10.3.2
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
King-pin inclination is the inward tilt of the top of the king pin when viewed from the front. It helps improve vehicle stability during cornering.
Step 6
Use a labelled sketch to show the Ackermann angle layout: 10.4
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The Ackermann angle layout aims to enable the inner and outer wheels to turn at different angles when navigating a turn. A labelled sketch includes points A through F depicting the wheel axes and steering arms.
Step 7
What is the purpose of toe-out on turns? 10.5
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The purpose of toe-out on turns is to ensure a true rolling motion of the front wheels while cornering, preventing tire scuffing and uneven wear.
Step 8
State TWO checks on a wheel BEFORE it is balanced: 10.6
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Checks include:
Inspecting the tires for cracks or damage.
Ensuring there is no foreign matter present on the rim and tires.
Step 9
What is the purpose of the catalytic converter fitted to the exhaust system of a motor vehicle? 10.7
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The catalytic converter transforms the harmful pollutants in the exhaust gases of an engine into less harmful emissions, contributing to reduced environmental impact.
Step 10
State THREE main aims of the adaptive speed control system: 10.8
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The main aims are:
To maintain the speed set by the driver.
To adapt speed to maintain a safe distance from the vehicle in front.
To provide warnings to the driver when a collision risk is detected.
Step 11
What is the function of the slip-ring and brush assembly on an alternator? 10.9
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The slip-ring and brush assembly provides a movable connection to allow current flow from the rotor windings to the external circuit, enabling the alternator to generate electrical energy.
Step 12
Draw the symbol of a diode that shows the direction of current flow: 10.10
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The diode symbol is represented as a triangle pointing towards a line, indicating the direction of current flow from the anode to the cathode.
Step 13
State TWO advantages of an electrical fuel pump on the fuel system of an internal combustion engine: 10.11
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Advantages include:
Immediate supply of fuel when the ignition is turned on, ensuring quicker engine start.
Reduced pulsation of fuel flow, leading to smoother operation of the engine.
