Chemical Plant Operation N6 — Document

August 2019 — N6 — Chemical Plant Operation

N6 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 4 pages 📝 40 items found 📚 1 topics

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Q1— Section header —

1.5\ in the ANSWER BOOK.

1.1Tar products are by products from the coke production process.

1.2A pH value of 7 refers to a strong alkali.

1.3The McL eod gauge is used to measure the pressure of mercury as low mm.

1.4A pitot static tube can be used to find the distribution of velocities in a main.

1.5Raoult s law states that a gas with a low pressure is expressed as equilibrium vapour pressure of the component which is proportional to the mole fraction of the same component.

Q2— Section header —

2.1Adsorbent is a separation in which certain components are transferred to the surface of a solid adsorbent.

2.1.1What are the THRE E types of adsorbers used in the industry? (3\

2.1.2Differentiate between adsorbent and adsorbate (2\

2.2rief explain the following:

2.2.1Raoult s law (3\

2.2.2Continuous distillation (6\

2.2.3Murphree plate efficiency (6\ [20]20

Q3— Section header —

3.1Discuss the following plates found in distillation and fractionation column

3.1.1Counterflow plates (4\

3.1.2Bubble cap plates (6\

3.2Define the following terms:

3.2.1Cracking or pyrolysis (3\

3.2.2Reforming or aromatis ation (2\

3.3Undesirable water and hydrogen sulphide must be removed from natural gas.

3.3.1Give THREE reasons hy water is removed from natural gas (3\

3.3.2Name FOUR methods used to remove water from natural gas. (4\

3.4Explain each of the following petroleum crudes:

3.4.1Paraffin base crudes (3\

3.4.2Intermediate base crudes (5\ [30]30

Q4— Section header —

4.1Give THREE examples of the gaseous products that are also produced uring carbonation of coal under high temperature (3\

4.2Write the chronological steps of the coke oven procedure. (11\

4.3Draw a flow diagram the manufacturing of aluminium sulphate by means of the Dorr procedure. (6\ [20]20

Q5— Section header —

5.1Discuss the following steps that are used in the preparation of caustic soda with the use of a diaphragm cell:

5.1.1Special purification of caustic soda (3\

5.1.2Final evaporation (2\

5.2Name FOUR types of temperature scales. (4\

5.3Draw a diagram of a simple potentiometer and describe its operation. (7\

5.4A thermometer is an instrument that is widely used in the industry to measure the temperature of materials. State FIVE disadvantages of using a filled system thermometer. (5\

5.5Differentiate between strong and weak acids. (4\ [25 TOTAL:

Topics Identified

Business Functions

Mark Allocation

Total100 marks

Sections5 + 20 + 30 + 20 = 75 marks

Paper information

TitleDocument

SubjectChemical Plant Operation

LevelN6

Document typeQuestion paper

Year2019

MonthAugust

Pages4

Downloads5

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,626

About Chemical Plant Operation examination preparation

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A practical revision approach

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