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Q1— Section header —
1.10\ in the ANSWER BOOK.
1.1... causes vapour locking in the brake system verheating of fluid due to frequent brake application Overco oling of brakes during high
1.2When the brake pedal free play is less than the s pecified valu the brakes drag. the brake s fade. vapour locking occurs in the brake lines
1.3Excess camber causes uneven tyre wear hard steering too much traction excessive steering alignment torque
1.4all joints are used o n the tie rod ends to ... reduce the amount of noise generated reduce the amount of sliding resistance
1.5The drive shaft is connected to the differential and the wheel hubs through universal joints which ...
1.6... are TWO advantages of using helical ge ars rather than spur gears in a transmission system trength and cost trength and less end thrust oise
1.7Incorrect steering axis inclination (S.A.I.\ causes tendency to assume toe out orientation generation of a braking effect at tight corners poor recovery of the steering wheel after
1.8An un balance d wheel makes a noise when its heavy point hits the road surface deflects in the vehicle's longitudinal direction
1.9The function of a fuel injector i iesel engine is to mix fuel and air ignite the air/
1.10basic difference between a spark ignition engine and a diesel engine is the diesel engine compressing air instead of an air/ fuel mixture the air temperature igniting the fuel in the iesel engine
Q2— Section header —
2.1Identify the components of the diesel fuel system used in a vehicle as shown in FIGURE 1 below . Write the answer next to the number (1 7\ in the ANSWER BOOK. FIGURE 1
2.2State FOUR disadvantages of a diesel engine when compared to a petrol engine (4\
2.3Name the FOUR combustion phases diesel fuel (4\
2.4Explain how to c arry out a dry seat test on a diesel injector (4\ [19]19
Q3— Section header —
3.1Identify the components of a rear axle assembly on a vehicle shown in FIGURE 2 below by writing the answer next to the letter (A F\ in the ANSWER BOOK.
3.2Explain the operation of the differen tial when the vehicle turns a corner (6\
3.3Name TWO functions of a final drive. (2\
3.4Give TWO reasons for preloading the pinion bearing (3\ [17]17
Q4— Section header —
4.1Ident ify the components of the synchronis ing unit in FIGURE 3 below, by writing the answer next to the letter (A F\ in the ANSWER BOOK. FIGURE 3
4.2Explain how the synchronis ing unit in FIGURE 3 works during a gearchange (5\
4.3Name THR EE types of bearings used in a gearbox. (3\ [14]14
Q5— Section header —
5.1Identify the component of a two piece Hotchkiss drive assembly in FIGURE 4 below by writing the answer next to the letter (A F\ in the ANSWER BOOK. FIGURE 4
5.2Give TWO reasons why a divided propeller shaft is used on trucks (2\
5.3Identify the components of a constant velocity joint in FIGURE 5 below by writing the answer nex t to the letter (A E\ in the ANSWER BOOK. FIGURE 5 (5\
5.4List the TH REE types of axles used on rear wheel drive vehicles (3\
5.5Identify the components of a rear suspension system in FIGURE 6 below, by writing the answer next to the letter (A F\ in the ANSWER BOOK. FIGURE 6 (6\ [22]22
Q6— Section header —
6.1Identify the components in FIGURE 7 below of braking system used i n a vehicle by writing the answer next to the letter (A F\ in the ANSWER BOOK. FIGURE 7
6.2Give FOUR advantages of disc brakes over drum brakes. (4\
6.3Expla in the procedure of bleeding brakes. (8\ [18] TOTAL:18