Making N4 — Memo

August 2021 — N4 — Making

N4 2021 Nated Engineering

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This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.1.1Hardwood

1.1.2

1.2

1.3

1.4Chemicals, air bubbles, froth skimming (3\

1.521

Q2— Section header —

2.1.1Plays a critical role in balancing pressure across headbo (1\

2.1.2Sketch must include tape, recirculation, alve adjusted to balance pressure, sight glass to view fibre flow (4\

2.2Discussion on either air flow for total head and stock flow for level, or vice versa Drawing show ing level transmitter, air supply, interlocks (5\

2.3.1

2.3.2

2.4.1ater doctored off; vacuum pulse pulls water (1\

2.4.2oil angle, spacing, removal/addition of blades (2\

2.4.3ater removal rate, formation, retention (2\ [23]23

Q3— Section header —

3.1Pd between stern and uy hapman layer o control chemical dosage (3\ 3;2

3.2.1etter retention critical for neutral/alkaline papermaking (2\

3.2.2ationic part to suction side of fan pump, anionic part before headbox (4\

3.3.1ccumulation on machine, holes in sheet (2\

3.3.2dhesives, hot melts, wood (1\ [12]12

Q4— Section header —

4.1Drawing must inclu de p ick up roll, first press suction roll and felt, granite roll, second press roll and felt, third press roll and felt, hp and lubrication showers, vacuum box (8\

4.2Nip load/ peed igh impulse improve water removal (2\

4.3Drawing must include ain steam supply, main, intermediate, wet end, separators, header, differential pressure control, vacuum system Discussion on differential pressure control and inte rlocks. (9\ [19]19

Q5— Section header —

5.1Porosity, speed, ingoing moisture, starch solids, load (4\

5.2.1igh at start, zero load diameter (3\

5.2.2ront drum higher at start, crossover diameter (3\

5.2.3igh tension increases density (1\ [11]11

Q6— Section header —

6.1easurement of reflectance/show through (2\

6.2Calendaring , ash content, refining (3\ [5]5

Q7— Section header —

7.1Headbox, breast roll, dandy, hp, trim, knock off, wire roll mark each (4\

7.29

Mark Allocation

Sections21 + 23 + 12 + 19 + 11 + 5 + 9 = 100 marks

Paper information

TitleMemo

SubjectMaking

LevelN4

Document typeNated Engineering

Year2021

MonthAugust

Pages4

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonWinter (SH)

Start daySunday

Exam periodAugust 2021

Days since exam1,895

About Making 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.

File details

File size179.3 KB

Pages4

Archived on8 September 2026

File age45d

ContributorFreeMode

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