Electrical Trade Theory N1 — Document

April 2019 — N1 — Electrical Trade Theory

N1 2019 Nated Engineering

↓ Download PDF 📄 259.8 KB

Preparing document

📋 Document Analysis

🎯 100 marks ⏱️ 3h 📄 5 pages 📝 42 items found

See full analysis

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 —

1.1State FOUR ways to isolate an electrical circuit to prevent an accident. (4\

1.2Name THREE common causes of fire which could have be en easily avoid ed

1.3List THREE basic hand tools (3\ [10

Q2— Section header —

2.2Two resistors with values of 6 ohms and 4 ohms respectively are connected in parallel his combination is connected in series wi th a third resistor of 2,6 ohms and then

2.2.1Total resistance of the circuit (4\

2.2.2Total current flow (3\

2.2.3Voltage drop across each resistor (6\

2.2.4Power dissipated in the circuit (3\ [20

Q3— Section header —

3.1What happe ns when an alternating voltage is applied to primary winding? (4\

3.2A single phase step down transformer with a ratio of 6 600/220 V delivers 40 A at 220 V. T he load has a power factor of 0,8 and it is assumed that the transformer has an efficiency of 100%.

3.2.1nput KVA

3.2.2Input power

3.2.3Primary current (3 3\ (9\ [13 11041861

Q4— Section header —

4.1ive FIVE advantages of a lead/ acid cell. (5\

4.2hat is the function of an electrical cell (4\

4.3What is the app roximate EMF per cell of a lead/ acid cell? (2\ [11

Q5— Section header —

5.1Name the FOUR major components of a voltmeter or an ammeter (4

5.2Give TWO disadvantages of a moving coil meter. (2\

5.3State Faraday s first law of electromagnetic induction. (3

5.4What is the frequency of alternating current supplies in South Africa? (2

5.5Which material is used for the brushes of an alternator (2 [13

Q6— Section header —

6.1Name any FIVE materials commonly used for electrical insulation and give ONE example of the use of each. (5 2\ (10\

6.2Explain each of the following and give ONE example for each

6.2.1Stationary appliance

6.2.2Portable appliance (2 3\ (6\

6.3Define bonding (2\ [18 11041861

Q7— Section header —

7.1Which test is carried out after supply has been connected? (2\

7.2Describe the purpose of each of the following:

7.2.1Earth leakage

7.2.2Lightning arrestors

7.2.3Load distribution (3 2\ (6\

7.3Name TWO semiconductor materials (2\

7.4THREE capacitors of 60 F, 100 F and 120 F respectively are connected in series across

7.4.1otal capacitance (3\

7.4.2harge across each capacitor (2\ [15] TOTAL: 100 1104186115

Mark Allocation

Total100 marks

Sections15 = 15 marks

Paper information

TitleDocument

SubjectElectrical Trade Theory

LevelN1

Document typeQuestion paper

Year2019

MonthApril

Pages6

Downloads3

Examination context

Decade2010s

Years ago7y

SeasonAutumn (SH)

Start dayMonday

Exam periodApril 2019

Days since exam2,749

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 size259.8 KB

Pages6

Archived on8 September 2026

File age46d

ContributorFreeMode

Fingerprint5CAF2CC1E1E8

Questions and learner discussion

No questions or discussions have been posted yet.