Chemical Plant Operation N6 — Document

April 2019 — N6 — Chemical Plant Operation

N6 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 4 pages 📝 38 items found

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Q1— Section header —

1.5\ in the ANSWER BOOK.

1.1A fixed bed a sorber is designed to process vapours at high pressures.

1.2LPG is only obtained as a by product in refineries.

1.3When an acid is dissolved in water, it is broken up into small particles called cations.

1.4Thermometers filled with mercury can be used within the range of 35 to 510 C.

1.55

Q2— Section header —

2.1Filtration is a process that is used to remove small particles of liquid or gas by forcing the liquid through a porous medium.

2.1.1State TWO applications of contact filtration of liquids. (2\

2.1.2Differentiate between continuous steady state and unsteady state contact filtration (4\

2.2Write a brief description about the following:

2.2.1Simple batch distillation (2\

2.2.2Relative volatility (4\

2.3Define the following terms:

2.3.1Volatility (3\

2.3.2Ion exchange (3\

2.3.3condition of feed (2\ [20] (8050026\20

Q3— Section header —

3.1State FIVE characteristics of tower packing (5\

3.2Briefly explain tray spacing (4\

3.3Name TWO processes that can be used in the refining and manufacturing of petroleum products. (2\

3.4Differentiate between polymerisation and isomerisation (4\

3.5Discuss FOUR methods that are employed for the purification of natural gas. (9\

3.6Define the following terms:

3.6.1Alkylation (2\

3.6.2Octane number (4\ [30]30

Q4— Section header —

4.1Name FIVE examples of gaseous products produced f om coking of coal. (5\

4.2State THREE uses of coal. (3\

4.3Draw a labelled flow diagram of coke oven plant. The diagram can be done on one whole page in landscape. (12\ [20]20

Q5— Section header —

5.1Name THREE parts of measuring instrument. (3\

5.2Draw a labelled diagram of a B ourdon tube. (8\

5.3Describe the operation of an inductance bridge hydrometer. (6\

5.4Write brief, clarifying notes on the following:

5.4.1Rankine scale 4\

5.4.225

Mark Allocation

Total100 marks

Sections5 + 20 + 30 + 20 + 25 = 100 marks

Paper information

TitleDocument

SubjectChemical Plant Operation

LevelN6

Document typeQuestion paper

Year2019

MonthApril

Pages4

Downloads2

Examination context

Decade2010s

Years ago7y

SeasonAutumn (SH)

Start dayMonday

Exam periodApril 2019

Days since exam2,748

About Chemical Plant Operation 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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Archived on8 September 2026

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