Building Science N3 — Memo

August 2019 — N3 — Building Science

N3 2019 Nated Engineering

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Q1— Section header —

1.1Curtaining, crinkling or sagging Cissing Blistering Flaking or peeling (4\

1.2(4\

1.3Initial drying shrinkage is th largest amount of shrinkage that takes place during the setting and hardening process (1\

1.4To determine the workability of a fresh concrete mix (1\ [10]10

Q2— Section header —

2.1.1Coefficient of friction, = Frictional force/ Normal orce = 500/2 000

2.1.2

2.2.1Velocity Ratio = Total number of pulleys

2.2.2Mechanical dvantage = Weight /Effort = (25 \/8

2.2.3Efficiency, = 100 = 2.89/5 = 57 (3 [15]15

Q3— Section header —

3.1Taking moment about RR 10RL =

11.57,5 25Sin45

3.540Sin60 = 338,65 RL = 338,65/10 = 33,87 kN = 434,53 = 434 /10 = 43,45 kN

3.3= 25Cos45 40Cos6 ,32

3.4RR = (RR + RR 1/2 RR = (2, + 43,45 1/2 RR = (1893, 1/2 = 43,51

3.5Calculate the direction of the reaction RR /RR = (2, /43,45\ (2.32 /43.45\ = 3, [16]16

Q4— Section header —

12.5

47.5

Q5— Section header —

5.1

5.3(4\

Q6— Section header —

6.1P = VI I = P/V = 1 500/220 = 6,82 A = 32,26 = 32,25 = 32,27

6.3The energy used in 2 hours E = Pt = 1,5 = 3,0 kWhr = R180,00 [10]10

Q7— Section header —

Mark Allocation

Sections10 + 15 + 16 + 16 + 21 + 10 + 12 = 100 marks

Paper information

TitleMemo

SubjectBuilding Science

LevelN3

Document typeNated Engineering

Year2019

MonthAugust

Pages8

Downloads5

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,628

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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File size364.2 KB

Pages8

Archived on8 September 2026

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