Electrical Workmanship NCV Level 4 — Document
November 2019 — NCV Level 4 — Electrical Workmanship
NCV Level 4
2019
NCV Engineering
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Questions — A Preview of What to Expect in the Document
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Q1— Section header —
1.1Explain the term bonding (3\
1.2What should the potential difference between objects connected to earth through conductive wires be with respect to each other? (1\
1.3Name TWO effects that electrical accidents can have on property. (2\
1.4Explain why w e should not use water to extinguish an electrical fire. (2\
1.5Choose a term from COLUMN B that matches a description in COLUMN A. Write only the letter (A D\ next to the question number (1.5.1
1.5.3\in the ANSWER BOOK. COLUMN A COLUMN B .5.1
1.5.3Fires that involve electrical or electronic equipment such as motors, generators and electrical wiring Fires that involve flammable or combustible metals such as magnesium, sodium, titanium, potassium, uranium,
1.6Name TWO types of workplace violence (2\
1.7Identify SEVEN important aspects tha The Permit to Work document should
Q2— Section header —
2.1Regulation 5.1.3 of SANS 10142 refers to earth fault current protection
2.1.1A new electrical (a\ ... shall not be (b\ ... to a supply unless the supply includes a (c\ ... conductor. (3\
2.1.2Explain the expression electrical separation of a circuit (2\ (12041014\
2.2Draw a neat fully labelled circuit diagram indicating how one light is controlled form three different switch locations using intermediate switching. Earthing of components must be indicated on circuit diagram as per SANS 10142
2.3.1What is the energy regulator switch used in a stove also known as? (1\
2.3.2State what this energy regulator switch is used for in a stove (1\
2.3.3Make a neat labelled layout diagram of the co nnections for this ener gy regulating switch used in a stove (5\ [20]20
Q3— Section header —
3.1.1Explain the term Luminous efficiency or efficacy with reference to lamps. (2
3.1.2What symbol is used to identify Luminous efficiency or efficacy (1\
3.1.3What is the unit of measure ment for Luminous efficiency or efficacy (1
3.2The quality of lighting is very important as it can be harmful to viewers. State TWO methods that can be used to avoid shadows (2\
3.3Explain the basic operation of a tungsten filament incandescent lamp. (3\
3.4Tungsten halogen lamps use a tungsten filament in a gas fille d, light transmitting envelope. List FOUR advantages of tungsten halogen lamps. (4\
3.5.1What does the acronym CFL stand for? (1
3.5.2Name the TWO parts CFLs consist of (2\
3.5.3Name TWO types of CFL lamp fittings. (2\
3.5.4Name TWO disadvantages of CFL lamps. (2\ [20] (12041014\ Copyright reserved20
Q4— Section header —
4.1technician can use various techniques to identify and locate the cause of faults in domestic appliances and portable power tools. Identify FIVE of these fault
4.2You have to perform circuit continuity testing on a single phase capacitor start induction run motor used in a washing machin e. Describe FOUR test
4.3Name FOUR types of electrical flex that are used on most types of electrical domestic appliances and portable power tools. (4\
4.4After faul finding and repair work has been completed on any electrical domestic appliance or power tool a durable tag should be attached to the equipment. List THREE examples of information that should be recorded on the tag to
4.5A power tool used in the workshop has been found to be defective. Describe FOUR actions that should be taken to prevent that the defective tool
Q5— Section header —
5.1Electric motors are classified according t o the type of enclosure they use the conditions under which they operate and the degree of ventilation required. Name FOUR types of motor enclosures and give an application for each type
5.2Name FIVE types of couplings t hat can be used to couple an electric motor to a mechanical load. (5\
5.3You need to look for several features w hen inspecting belt drive guards Describe FOUR important features that a well designed belt drive guard
5.4List t he THREE main parts of a hree phase induction motor. (3\ [20]20
Mark Allocation
Total100 marks
Sections20 + 20 + 20 + 20 + 20 = 100 marks
Paper information
TitleDocument
SubjectElectrical Workmanship
LevelNCV Level 4
Document typeQuestion paper
Year2019
MonthNovember
Pages5
Downloads5
Examination context
Decade2010s
Years ago7y
SeasonSpring (SH)
Start dayFriday
Exam periodNovember 2019
Days since exam2,536
About Electrical Workmanship 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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