Materials NCV Level 4 — Memo

November 2022 — NCV Level 4 — Materials

NCV Level 4 2022 NCV Engineering

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Q1— Section header —

1.1.5

1.2.1Polyethylene

1.2.2Nylon

1.2.3Polyvinyl chloride

1.2.4Teflon

1.2.5Polyester (5 (5\

1.3.1Lamination is the process used to join two or more layers of material to form a composite.

1.3.2Photo degradation refers to chemical changes in a material that take place when the material absorbs UV light. (2 2\ (4\

1.4High creep High coefficient Low density Can be recycled [20]20

Q2— Section header —

2.1Elasticity Snap/rebound Resilience

2.2It stays elastic after curing It does not shrink It keeps its colour and is waterproof It resists most chemicals and solvents

2.3Indication of how easily a fluid or gas can pass through a porous medium. (2\ [10]10

Q3— Section header —

3.1A contact adhesive is an adhesive that sticks to itself. and are not tacky or viscous but remain flexible and rubbery. A hot melt adhesive is solid when it is bought but when heat is applied it melts and becomes sticky.

Q4— Section header —

4.1H2 treated timber is timber not in contact with the ground that is covered by a roof and not exposed to outside weather conditions. (3\

4.2Roof trusses Panel ing Structural timber Ceiling Flooring ( Any 3 (3\

4.3Binders Additives

4.5Easy to use Breathable Eco friendly Does not need expensive equipment It provides a more weather proof finish Can be applied for new or old brickwork as well as concrete surfaces (Any 6

Q5— Section header —

5.1Paint the area to be waterproofed using the waterproofing paint. Using the bristles of the paint brush, press the membrane onto the wet paint. Remove air bubbles caused by air trapped under the membrane by dabbing the cloth with the brush.

5.3Acrylic resin based cementite Bitumen emulsion system separated by a gap or cavity (2\

5.5To prevent moisture in the soil below the floor slab from penetrating the concrete slab and damaging the floor reinforcement and finishes. A DPC is also placed between the wall and the bottom of a window sill

Q6— Section header —

6.1Non volatile. Bitumen is now used for road works instead of tar as it is much safer and environmentally friendly Economical in comparison with other types. Highly resistant to rutting. Any 2 (2\

6.3and dispersing it in water by means of emulsifiers and high speed colloid mixing mills. (2\ [10]10

Q7— Section header —

7.1Solid r ivet Easily disassembled and can be reused Similar dissimilar materials can be joined Improved stress distribution when distributed evenly Resist flex and mechanical shock

Mark Allocation

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

Paper information

TitleMemo

SubjectMaterials

LevelNCV Level 4

Document typeNCV Engineering

Year2022

MonthNovember

Pages5

Downloads3

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,441

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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