Motor Trade Theory N3 — Document

August 2018 — N3 — Motor Trade Theory

N3 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 4 pages 📝 32 items found

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.1State THREE advantages that numerical filing system has over an alphabetical system when keeping track of the work done in a workshop

1.2In FIVE points d escribe the correct procedure to be followed by a receptionist poor repair work done to a vehicle (5\

1.3List FIVE items that should be checked by the safety representative when carrying out an inspection of a garage. (5\

1.4An engine has a cylinder diameter of 95 mm and a stroke length of 88 mm. The combustion chamber is in the cylinder head and has the same diameter as the cylinder. The air standard efficiency is 63 %. Calculate the following:

1.4.1The compression ratio (4\

1.4.2

1.4.3

1.5Name the THREE main parts of transistor (3\ [25]25

Q2— Section header —

2.1What is the function of the freewheel device in an automatic gearbox? (2\

2.2Study the sketch of the freewheel below and answer the questions

2.2.1Label the parts numbered A in the sketch above. (6\

2.2.2Briefly explain the operation of an automatic gearbox that is fitted with freewheel device (4\

2.3Describe in detail the construction and functions of the THREE members of the torque converter (6\

2.4State FOUR advantages of fluid clutches over friction clutches. (4\

2.5State THREE advantages of a fluid coupling over a torque converter. (3\ [25]25

Q3— Section header —

3.1Describe the operation of an electronic fuel injection system. (6\

3.2Make a neat sectional drawing of a mechanical constant spray injection. Label ALL the parts. (10\

3.3Name THREE advantages of power steering. (3\

3.4State THREE disadvantages of power steering. (3\

3.5List THREE causes of steering pump noise. (3\ [25]25

Q4— Section header —

4.1List THREE basic forms of cam lobes on camshafts. (3\

4.2Describe the function of each of the following with regard to valve timing:

4.2.1Lead on the exhaust valve

4.2.2

4.3Which valve layout provides cross flow of gases through the cylinder? (1\

4.4State THREE advantages of an L head engine over an I head engine. (3\

4.5Name FIVE types of valves that have been used d uring the development of internal combustion engines (5\

4.6Make a neat sectional sketch to illustrate the third differential on tandem drive vehicles. Label the SIX main parts. (9\ [25] TOTAL: 10025

Mark Allocation

Total100 marks

Sections25 + 25 + 25 + 25 = 100 marks

Paper information

TitleDocument

SubjectMotor Trade Theory

LevelN3

Document typeQuestion paper

Year2018

MonthAugust

Pages4

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonWinter (SH)

Start dayWednesday

Exam periodAugust 2018

Days since exam2,992

About Motor Trade Theory examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

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