Building Science N1 — Memo

November 2023 — N1 — Building Science

N1 2023 Nated Engineering

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31.4MARKING GUIDELINE -2- BUILDING SCIENCE N1 Copyright reserved Please turn over

Q1— Section header —

1.5(5 [5]5

Q2— Section header —

2.5False True True False True (5 [10] QUESTION10

3.1The relative density (r.d.\ of a substance is the density of the substance compared with the density of water or the mass of any volume of the substance compared with the mass of an equal volume of water.

3.2Empty container = 10 Empty container + paraffin = 43 Volume of paraffin = 31 4 cm Mass of

3.3R.D = 0, 75 = (7\ [15]15

Q4— Section header —

4.1ust have correct proportions of fine to coarse aggregates Must have the correct cement aggregate ratio Must have the correct water cement ratio Must be mixed well Must be fully compacted (6\

4.2Water cement ratio = (4\ [10] Densityoftimber Densityofwater 1000/ Densityoftimber kgm10

Q5— Section header —

5.1K = 273 + = 273 + 35 (2\

5.2The diaphragm pump has a thick rubber or leather diaphragm bolted into the frame of the cylinder. This diaphragm is used to divide the cylinder into two sections . A large metal washer is bolted on either side of the rubber

5.3Pressure = height density gravitational acceleration = h [15]15

Q6— Section header —

6.1.1350 N 220 N R = 130 N towards the left hand side (2 (4\

6.1.2Equilibrant = 130 N towards the right hand side (2\

6.2Horizontal component HC = F Cos = 50 Cos 60 = 25 kN Vertical component VC = Fsin = 50 Sin 60 = 43,

6.3Refer to DIAGRAM SHEET 1 (attached\. (6\ [18]18

Q7— Section header —

7.1

7.2Refer to DIAGRAM SHEET 2 (attached\ (9\ [12]12

Q8— Section header —

8.1f more than three forces acting on a point are in equilibrium, they can be represented in magnitude and direction by the sides of a closed polygon, taken in order. (4\

8.2Refer to DIAGRAM SHEET 3 (attached\. (11\ [15] TOTAL15

6.3

7.2(6\ No scale to the drawing FORCE DIAGRAM Scale 1 cm = 2 kN 10 kN 16 kN SPACE DIAGRAM No

8.2POLYGON DIAGRAM Scale 1 cm = 10 N

4.9R = 150 N

2.5a b c d e o o o o SPACE DIAGRAM Scale 1 cm = 1 m = de = 74 N = ea = 76 N

Mark Allocation

Sections5 + 10 + 15 + 10 + 15 + 18 + 12 + 15 = 100 marks

Paper information

TitleMemo

SubjectBuilding Science

LevelN1

Document typeNated Engineering

Year2023

MonthNovember

Pages8

Downloads5

Examination context

Decade2020s

Years ago3y

SeasonSpring (SH)

Start dayWednesday

Exam periodNovember 2023

Days since exam1,076

About Building Science 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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