Materials NCV Level 4 — Memo

November 2023 — NCV Level 4 — Materials

NCV Level 4 2023 NCV Engineering

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Q1— Section header —

1.1Plastics are recyclable Withstand corrosion well if treated properly Are quick and easy to manufacture and assemble in construction Have a high strength mass ratio Pave the way for new industries Allow designers to be flexible and innovative

1.2Take a copper wire of about 12 cm long and pick it up with a tweezers of pliers. Heat the free end of the copper wire at the free end until it glo ws red and put it on the plastic you want to test so that a pi

1.3Knife slither test

1.4Pipes and sewers Boats, sports cars, aircraft Wind turbine blades Storage tanks Baths, Jacuzzis and swimming pools Canopies for bakkies (5\

1.5.1Polyamides

1.5.2Polycarbonate

1.5.320

Q2— Section header —

2.1Bricks and plaster Timber Marble Mild steel Copper Brass Sweep the slab to remove all dust. Use a commercial cleaner to clean the slab according to the

Q3— Section header —

3.1Clean both surfaces of grease, dirt, and other contaminants. Apply a thin even layer of glue to both sides. Allow one or two minutes for the glue to be absorbed. Place the two pieces in its correct direction.

3.3It is an adhesive that sticks to itself. One applies the adhesive to both surfaces that needs to be joined. You allow adhesive to dry a little and the bring the two glued surfaces together to form a solid bond.

3.4Water resistant Solvent free Strong [15]15

Q4— Section header —

4.1A hazard rating scale is provided on all treated timber according to the SANS 10005 to indicate the risk that is covered by a roof and not exposed to outside weather conditions. (3\

4.3They are cheaper than solvent based paints. They are easy to apply and are resistant to most chemicals. They dry more quickly than solvent based paints. Their odour is weaker than that of solvent based paints. (

4.4Binders Additives The two layers of the duplex coating ( galvanize and paint\ works together that increase the life span of the zinc and paint. The synergistic effect of a duplex coating can then

Q5— Section header —

5.1Polymer modified bitumen membrane (torch ones\ Insitu reinforced liquid system Lay the membrane on top of the wet paint. Using the bristles of the paint brush, press the membrane onto the wet paint. Any air trapped under the membrane will

5.4Silanes [15]15

Q6— Section header —

6.1.1

6.2Non volatile An adhesive Soluble in many organic solvents Resistant to attack by acids, alkalis and salts [10]10

Q7— Section header —

7.1Fasteners such as bolts, nuts, set screws and studs are widely used in the construction industry to join various parts, components and systems together. Ensure that the friction is reduced with a washer.

Mark Allocation

Sections20 + 10 + 15 + 20 + 15 + 10 + 10 = 100 marks

Paper information

TitleMemo

SubjectMaterials

LevelNCV Level 4

Document typeQuestion paper

Year2023

MonthNovember

Pages6

Downloads4

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2023

Days since exam1,075

About Materials 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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