Ordinary level 2026 South West mock vehicle technology guide
Ordinary level 2026 South West mock vehicle technology guide
Subject code: 5150 (Basic Vehicle Technology 2)
Question 1: SUSPENSION SYSTEM
The figure 1a below illustrates a method of tired rotation.
a- State two (02) consequences that lower than specified tire inflation pressure could lead to. (1mark x 2 = 2 marks)
– Reduced fuel economy; – Reduced tire life; – Increased chances of roadside faults or accidents.
b- List two (02) reasons why tire rotation is essential during service. (1mark x 2 = 2 marks)
– To ensure long life; – Equilibrate tire wear.
c- Reproduce figure 1b. Twice and demonstrate two (02) recommended methods of tire rotation. (1mark x 2= 2 marks)
| Method 1 | Method 2 | Method 3 |
d- What type of suspension is in figure 1c? (1 mark)
Independent rear wheel suspension.
e- Identify the parts labelled a, b, c, d, f, g, h and j in figure 1c above. (2 marks)
| Ref. | Name (0.25mark x 4) | Ref. | Name (0.25mark x 4) |
| A | Upper control arm | F | Shock absorber |
| B | Upper bolt join | G | Coil spring |
| C | Knuckle | H | Strut rod |
| d | Stabilizer bar and rod assembly | j | Lower control arm shaft and bushing |
| f Give the function of the torsion bar in figure 1c above. It stabilizes the vehicle (by preventing rolling) in the turns and on the jolly roads. |
(1 mark) |
g- Outline one disadvantage of a solid axel support over an independent rear axle. (1 mark)
– A solid supports the springs, so the axle and suspension components are unsprung weight. When one wheel rides
over a bump, the force of impact transfers through the solid axle to the opposite side, to unstable handing;
– Side-to-side road shock transference; – Poorer tire adhesion.
Question 2: AIR CONDITIONING SYSTEM
The figure 2 below represents the air conditioning system of a Toyota Avensis.
