Electrical Trade Theory N1 — Memo

August 2021 — N1 — Electrical Trade Theory

N1 2021 Nated Engineering

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Q1— Section header —

1.1Objects falling from above People slipping on greasy, wet or dirty floors Fires Injury due to protruding nails , splinters, etc. (5\

1.2The guard should provi de maximum positive protection. It should block access to the danger zone during operation. It should be permanent part of the machine without affecting its structure. It should not affect

1.3It means to open or break a circuit so that it is not electrically continuous. (2\ [10]10

Q2— Section header —

2.1Class B Class C One must ensure that the blade tension is correct and tha t the teeth are facing forward. Care must be taken to replace

Q3— Section header —

3.1.1True

3.1.2False

3.1.3False

3.1.4True (4 (4\

3.2.1

3.2.2

3.2.4

3.3.3

3.3.4= 0,284 0, 275 = 0,078 V

3.3.5V = I = 0,284 = 1,42 V

3.3.6V = I = 0,284 = 1,42 V (2\

Q4— Section header —

4.1It is cheaper It is naturally waterproof as a higher dielectric strength t has a higher tensile strength It does not heat up in the sun

4.2.1Lamp/bulb

4.2.3Fuse

4.2.5Transformer

4.2.7Motor

4.2.9Battery

4.2.10(10\ [15]15

Q5— Section header —

5.1Rooms with two entrances Passages (3\

5.2So that the full supply voltage will be applied across appliances when they are switched on. (2\

5.3Cannot be vandalised Lower maintenance Less susceptible to the impact of severe weather Suited for places where it is difficult to use overhead lines due to obstructions and dangers presented by the overhead lines.

5.4Utilizing an underground cable connected to a distribution transformer Using an underground cable connected to an overhead transmission line (3 (6\

Q6— Section header —

6.1All switches and MCBs on All loads disconnected Live and neutral bars bridged

6.2It can be made of iron, nickel and cobalt by exposing them to an external magnetic field. (3\

6.3the outstretched thumb will point in the direction of the north pole of the electromagnet. It has he alth and environmental benefits Less maintenance is required Multiple forms of renewable energy exist compared to fossil fuel resources

Topics Identified

Business Plan

Mark Allocation

Sections10 + 10 + 15 + 20 = 55 marks

Paper information

TitleMemo

SubjectElectrical Trade Theory

LevelN1

Document typeNated Engineering

Year2021

MonthAugust

Pages5

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonWinter (SH)

Start daySunday

Exam periodAugust 2021

Days since exam1,897

About Electrical 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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File size211.4 KB

Pages5

Archived on8 September 2026

File age47d

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