Chemical Plant Operation N4 — Document

April 2018 — N4 — Chemical Plant Operation

N4 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 42 items found 📚 1 topics

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Q1— Section header —

1.5\in the ANSWER BOOK.

1.1Ozone gas can be used to disinfect waste water.

1.2Crushers describe a variety of size reduction machines for intermediate duty.

1.3Poiseuille s law is applied in place of the Fanning equation when the Reynolds number is greater than 2100.

1.4Sulphur dioxide can be used to prevent mould in the drying of food.

1.55

Q2— Section header —

2.5\in the ANSWER BOOK. COLUMN A COLUMN B

2.5The flow expressed as volume per unit time divided by the cross sectional area of the pipe A type of hammer mill that contain a high

Q3— Section header —

3.1If a fluid is flowing at a rate of 250 m /min through a pipe having an inside diameter of 3 m, calculate the average linear velocity of the fluid. (4\

3.2Write brief clarifying notes on how to determine the friction factor ( \in the Fanning equation. (5\

3.3Differentiate between the following:

3.3.1

3.3.2

3.4Name THREE variables which serve to indicate whether the flow is streamline flow or turbulent flow. (3\ [20]20

Q4— Section header —

4.1Name FOUR types of intermediate and fine grinders. (4\

4.2Draw a fully labelled diagram of a jaw crusher. (10\

4.3Define the following:

4.3.1Critical speed (ball mill

4.3.2Grinder

4.3.3Angle of nip (smooth roll crusher\ (3 2\ (6\ [20]20

Q5— Section header —

5.1State THREE commercial processes for the manufacturing of carbon dioxide. (3\

5.2Sulphur dioxide is produced industrially by the burning of sulphur.

5.2.1Draw a flow diagram of liquid sulphur dioxide production (10\

5.2.2Give a chronological description of the process in

Q5— Section header —

Q6— Section header —

6.1Copper and its alloys are widely used in chemical processing where heat and electrical conductivity are important factors.

6.1.1Name TWO methods that can be used to join copper. (2\

6.1.2Name THREE types of copper alloys. (3\

6.2State TWO properties of titanium. (2\

6.3Name THREE raw materials that can be used in the making of ester. (3\

6.4Give FIVE reasons w hy oxygen is preferred to air in the industry. (5\ [15]15

Q7— Section header —

7.1Hard water may cause scaling in pipes and also make it more difficult for soap to clean effective ly.

7.1.1

7.1.2What are the main causes of water hardness? (2\

7.2Draw a fully labelled diagram of the municipal water purification plant process. (9\ [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

MonthApril

Pages6

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,114

About Chemical Plant Operation examination preparation

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How to use this resource for revision

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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.

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A practical revision approach

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