Diesel Trade Theory N2 — Document
August 2018 — N2 — Diesel Trade Theory
N2
2018
Nated Engineering
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Q1— Section header —
1.1Name the types of injector spray nozzles shown in FIGURE 1 by writing only the answer next to the letter (A D\ in the ANSWER BOOK. (4\ FIGURE 1
1.2State TWO functions of diesel fuel injectors. (2\
1.3Give THREE reasons why a copper washer is fitted between the injector tip and the cylinder head on a diesel engine. (3\
1.4State SIX advantages of a diesel engine when compared to a petrol engine. (6\
1.5Name TWO basic types of injector pumps used on diesel engines. (2\
1.6State ONE purpose of each of the following diesel fuel system components:
1.6.1Lift pump
1.6.2Glow plugs
1.6.3Leak off pipes (3 2\ (6\ [23]23
Q2— Section header —
2.1Choose a description from COLUMN B that matches an item in COLUMN A. Write only the letter (A \next to the question number (2.1.1
2.1\in the ANSWER BOOK. COLUMN A COLUMN B
2.1.6Shift forks Shift linkage Detent mechanism Spring tension Interlock ing mechanism Shift patterns
2.2FIGURE 2 , below, shows a diagram of a propeller shaft used on a vehicle. Name the components labelled
2.3State ONE function of EACH of the following components of a driveshaft
2.3.1Slip joint (1\
2.3.2Hooke's type universal joint
2.4Give TWO reasons why a divided H otchkiss is used on heavy vehicles. (2\
2.5ive TWO reasons for the use of the differential unit. (2\
2.6FIGURE 3 , below, shows a diagram of a gear synchroni
2.7State TWO reasons for the use of a synchroni ing unit. (2\ [25] 1104019225
Q3— Section header —
3.1FIGURE 4 , below, shows a diagram of a leaf spring used on a truck. Name the components labelled (A \the ANSWER BOOK. (3\
3.2Give ONE purpose of each of the following suspension components:
3.2.1The component indicated as B in FIGURE 4.
3.2.2Swinging shackle
3.2.3The component indicated as C in FIGURE 4. (3 1\ (3\
3.3FIGURE 5 , below, shows a diagram of a constant velocity joint. Name the components labelled (A F\ in the ANSWER BOOK. (6\ FIGURE 5
3.4State TWO advantages of using a constant velocity joint. (2\ [14] 1104019214
Q4— Section header —
4.1FIGURE 6 , below, shows a diagram of a linkage steering system. Name the components labelled (A F\ in the ANSWER BOOK. (6\ FIGURE 6
4.2xplain in detail the following steering geometry terms:
4.2.1Camber (2\
4.2.2Included angle (2\
4.2.3Toe out on turns (2\ [12] 1104019212
Q5— Section header —
5.1FIGURE 7 , below, shows a diagram of a braking system. Name the components labelled (A F\ in the ANSWER BOOK. (6\ FIGURE 7
5.2Give ONE purpose of EACH of the following brake system components , as shown in FIGURE 7
5.2.1Component C (1\
5.2.2Component F
5.3FIGURE 8 , below, shows a diagram of a residual pressure master cylinder. Name the components labelled (A F\ in the ANSWER BOOK. (6\ FIGURE 8
5.4Give TWO functions of a check valve in a brake master cylinder. (2\ [16] 1104019216
Q6— Section header —
6.10\in the ANSWER BOOK.
6.1symptom caused by brake disc run out
6.2The torque available at the contact between the driving wheels and the road is known as ... effort.
6.3Incorrect steering axis inclination (S.A.I.\uses ... the vehicle to pull to the side of lesser inclination the
6.4vehicle ride will be more comfortable if the ... is kept to the minimum.
6.5The cetane rating of diesel fuel is in the order of ... 45 25
6.6The compression ratio for diesel engines usually lies in the range of ... . :1. 10
6.7The main function of the brake fluid is lubrication power transmission
6.8The basic characteristics of a brake fluid is high boiling point low viscosity
6.9The main feature of the MacPherson strut suspension is that the vertical size of the suspension can be made more compact
6.10When turning a corner the front wheels are toeing out front wheels are turning on
Topics Identified
1
Business Plan
Mark Allocation
Total100 marks
Sections23 + 25 + 14 + 12 + 16 + 10 = 100 marks
Paper information
TitleDocument
SubjectDiesel Trade Theory
LevelN2
Document typeQuestion paper
Year2018
MonthAugust
Pages10
Downloads4
Examination context
Decade2010s
Years ago8y
SeasonWinter (SH)
Start dayWednesday
Exam periodAugust 2018
Days since exam2,993
About Diesel Trade Theory examination preparation
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