Chemical Plant Operation N4 — Document

August 2018 — N4 — Chemical Plant Operation

N4 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 43 items found 📚 1 topics

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Q1— Section header —

1.5\in the ANSWER BOOK.

1.1Silica is removed from water by using hydrogen cation exchange.

1.2Particles in an impactor hammer mill are broken by rubbing action.

1.3Carbon dioxide can be produced from the combustion of fuel oil in a boiler plant generating the required steam.

1.4Fluids having low viscosities offer less resistance to a shearing force.

1.5Titanium can be used as a construction material. (5 1\ [5]5

Q2— Section header —

2.5\in the ANSWER BOOK. COLUMN A COLUMN B

2.5The Reynolds number range falls between 2 100 and 4 000 Slow speed machines used

Q3— Section header —

3.1Define the following:

3.1.1Static pressure

3.1.2Absolute viscosi ty

3.1.3Velocity pressure (3 2\ (6\

3.2Use formula to prove that the Reynolds number is dimensionless. (5\

3.3A fluid flowing through any type of conduit contains three fundamental types of energy. Name and define the THREE types of energy. (6\

3.4Describe the law of conservation of energy. (3\ [20]20

Q4— Section header —

4.1Name TWO types of each of the following grinders:

4.1.1Tumbling mills

4.1.2Rolling compression mills (2 2\ (4\

4.2Make a labelle d sketch of a classifying hamm er mill ( micro atomiser (10\

4.3Discuss ultrafine grinders. (2\

4.4Describe the operation of the smooth roll crusher. (4\ [20]20

Q5— Section header —

5.1Hydrogen is the most abundant gas in the universe and it is ma de up of two hydrogen atoms. State FOUR methods used in the production of hydrogen. (4\

5.2Draw a process flow diagram in the production of carbon dioxide (CO \from oil or natural gas. (10\ 8050004

5.3State FOUR uses of oxygen. (4\

5.4What are the TWO main steps used in the fractional distillation of air (cryogenic process\ produce nitrogen and oxygen? (2\ [20]20

Q6— Section header —

6.1There are more than 70 standard types of stainless steel used to produce many special alloys. State T HREE properties of stainless steel. (3\

6.2Alloy steel contains one or more alloying agents to improve its mechanical and corrosion resistant properties to be better than those of carbon steel. Give TWO examples of these agents. (2\

6.3tate FOUR advantages of plastics. (4\

6.4Define the following:

6.4.1Sulfonation

6.4.2Oxidation (2 3\ (6\ [15]15

Q7— Section header —

7.1Draw a flow diagram of the municipal waste water treatment process. (8\

7.2Define the follow ing:

7.2.1Ion exchange (3\

7.2.2Softening (2\

7.2.3Temporary hardness (2\ [15] TOTAL: 100 805000415

Topics Identified

Business Functions

Mark Allocation

Total100 marks

Sections5 + 5 + 20 + 20 + 20 + 15 + 15 = 100 marks

Paper information

TitleDocument

SubjectChemical Plant Operation

LevelN4

Document typeQuestion paper

Year2018

MonthAugust

Pages6

Downloads2

Examination context

Decade2010s

Years ago8y

SeasonWinter (SH)

Start dayWednesday

Exam periodAugust 2018

Days since exam2,993

About Chemical Plant Operation examination preparation

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Archived on8 September 2026

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