Materials NCV Level 2 — Memo

November 2023 — NCV Level 2 — Materials

NCV Level 2 2023 NCV Business

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Q1— Section header —

1.1Thermal resistance is the term used to describe how well a material can resist heat.

1.2Heterogeneous behaviour is the opposite of anisotropic The properties of an anisotropic material change depending on the direction in which

1.3

1.4Porosity is a measurement of the void spaces in a material, and is measured as a percentage between 0 and 100%.

1.510

Q2— Section header —

2.1.3True False True (3 (3\

2.2Mantle is the part between the core and the crust As water washes rock particles down a river, particles will bump into larger, stationery rocks and, in the process, attrition will take place. Particles dislodged from the rocks will

Q3— Section header —

3.1Gravel Silt Sand Wattle and daub Cob Mud and cow dung Pole Collapsible soil Dolomite

Q4— Section header —

4.1When using mortar, use a mortar mix that contains materials that allows for expansion. Build walls that are not too long. Moisten the bricks before laying. If a long wall is required, build control joints in preparation for any expansion

4.2Soft mud process like spalling or crumbling or could be an aesthetic issue where the surface develops blemishes Apply oxide to the stains bricks without wetting them nce the oxide is applied, the bricks should be neutralised with a neutralising agent

4.6A cavity wall consist of two masonry walls separated by a small hollow space. A cavity wall formed from two thicknesses of brickwork or block work with a space between them. (1\ [15]15

Q5— Section header —

5.1.10

5.2Durability Static Dynamic or impact Vibratory compaction Compacting by hand Do not refrigerate admixtures. Bags of powdered admixtures must be stored in a cool and dry place. Liquid admixtures need to be

Q6— Section header —

6.1Sand Batch the aggregate according to the correct ratio. Mix well with cement til the mixture is greyish in colour. Form a h ollow in the mix and add the correct amount of water. To bond masonry units together

Q7— Section header —

7.1Curing compounds are materials added to plaster which is specifically formulated to cure, seal and chemically harden plaster. (2\

7.2from the plaster in the few hours after it has been applied. Recommend precautions to combat cracks: These cracks can be filled easily with appropriate filler and painted over. Spatterdash coat [10]10

Q8— Section header —

8.1.6

8.2Screed is applied for light duty traffic floors such as residential or commercial building Topping is a concrete mixture design to be h ave strength and consists of cement , sand, water and small stones.

Mark Allocation

Sections10 + 10 + 10 + 15 + 25 + 10 + 10 + 10 = 100 marks

Paper information

TitleMemo

SubjectMaterials

LevelNCV Level 2

Document typeNCV Business

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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