Electrical Trade Theory N1 — Document

November 2019 — N1 — Electrical Trade Theory

N1 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 39 items found

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Questions — A Preview of What to Expect in the Document

This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.1

1.2Give FOUR reasons why good housek eeping is important. (4\

1.3What is a bending spring (2\ [14]14

Q2— Section header —

2.1State hm' s law. (4\

2.2A circuit consists of three resistors in series. The values of the resistors are as follows 10 . T Calculate

2.2.1The total resistance (2\

2.2.2The total c urrent flow through the circuit (2\

2.2.3The voltage drop across the other resistors (4\

2.2.4The appli ed voltage (2\

2.3C. What is the resistance at 50 C? Take the temperature coefficient of resistance of copper as

Q3— Section header —

3.1Give FOUR advanta es of a transformer. (4\

3.2Name TWO methods to cool transformers. (2\

3.3An 11 k V/ 220 V single phase step down transformer has 3 000 primary turns.

3.3.1The transformer ratio

3.3.2The number of secondary turns

3.3.3

Q4— Section header —

4.1Give THREE advantages and THREE disadvantages of both p rimary and

4.2State the fu nction of the commutator on a D C generator. (2\ [14]14

Q5— Section header —

5.6\the ANSWER BOOK.

5.1the time taken for a wave to complete one cycle.

5.5In a purely capaciti ve AC

5.612

Q6— Section header —

6.1Compare moving iron and moving coil instruments.

6.2Write each of the following abbrevia tions in full:

6.2.1PILCSTA/ PILCSWA

6.2.2XLPE

6.2.3PVC (3 1\ (3\

6.3What is the purpose of the polarity test on a newly completed electrical installation? (3\ [16] 1104186116

Q7— Section header —

7.1Explain the term fuse (5\

7.2Why are the lights in a domestic installation connected in parallel? (2\

7.3Give TWO examples where light emitting diodes (LED\ are used in practice. (2\

7.412

Mark Allocation

Total100 marks

Sections14 + 18 + 14 + 14 + 12 + 16 + 12 = 100 marks

Paper information

TitleDocument

SubjectElectrical Trade Theory

LevelN1

Document typeQuestion paper

Year2019

MonthNovember

Pages6

Downloads2

Examination context

Decade2010s

Years ago7y

SeasonSpring (SH)

Start dayFriday

Exam periodNovember 2019

Days since exam2,537

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.

File details

File size274.5 KB

Pages6

Archived on8 September 2026

File age47d

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FingerprintC731732665BE

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