Process Chemistry NCV Level 2 — Memo

November 2022 — NCV Level 2 — Process Chemistry

NCV Level 2 2022 NCV Engineering

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Q1— Section header —

1.55

Q2— Section header —

2.1True

2.2True

2.3True

2.4False

2.55

Q3— Section header —

3.1Air

3.2Nitrogen

3.3Oxygen

3.4Carbon dioxide, sulphur dioxide or any other pollutants

3.55

Q4— Section header —

4.55

Q5— Section header —

5.1Hardness of water refers to t he dissolved salt in the water, and calcium carbonates form temporary hard water, whereas magnesium and calcium sulphates and chlorides are responsible for permanent hardness

5.2.2The process involves rapid mixing of water with chemical floccul in order to allow the floccul nt to be evenly mixed with water using a propeller turning at high speed. (6\

5.3Incineration is the form of waste treatment in which organic waste is burned. (2\

5.420

Q6— Section header —

6.1.2Xe

6.1.3Ar

6.1.5

6.2

6.3Any correct label (10 (10\ [20]20

Q7— Section header —

7.1PG lass Agi Glass (3\

7.2Furniture (tables tops\ Flat glass (used mainly for windows in buildings and cars\ Glass fibres used in the production of fibreglass Electric light bulbs Architectural applications

7.3.1They are u sed to remove bubble from glass by directly allowing them to e scape the liquid glass mixture. E.g. odium sulphate

7.3.2They work by changing the properties of the glass so that bubbles can escape more easily; they also lower the surface tension of the glass , allowing for better bubble removal. E.g. fluorine

7.3.3

7.4Cullet is recycled glass that is added to the raw materials during the glass production process. (2\ [20]20

Q8— Section header —

8.1During a chemical accident, you may encounter dangerous chemicals. Should you become contaminated, the chemicals on your body must be neutralised as soon as possible. Go to the emergency shower as soon as possible, step on

8.2Solid waste is unwanted solid material such as garbage, paper, plastic and other synthetic materia ls, metals and wood.

8.3A fi re door is a door that can stop For max imum performance of fire doors, they must not have cracks and holes; Fire fighting equipment

Topics Identified

Organic Chemistry

Mark Allocation

Sections5 + 5 + 5 + 5 + 20 + 20 + 20 + 20 = 100 marks

Paper information

TitleMemo

SubjectProcess Chemistry

LevelNCV Level 2

Document typeNCV Engineering

Year2022

MonthNovember

Pages6

Downloads3

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,440

About Process Chemistry 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 size240.6 KB

Pages6

Archived on8 September 2026

File age46d

ContributorFreeMode

Fingerprint46072579C89C

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