Plant Opertation Theory N3 — Document

November 2022 — N3 — Plant Opertation Theory

N3 2022 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 41 items found

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Q1— Section header —

1.1Differentiate between thermoplastics and thermosetting plastics (4\

1.2Sketch the molecular structures of each of the following:

1.2.1Polymer (3\

1.2.2Polyethylene (2\

1.3Explain the sy thesis of ammonia. (8\

1.4Define the term synthesis and give an example. (3\ [20]20

Q2— Section header —

2.1Make a labelled sketch of a bomb calorimeter. (1

2.2xplain each of the following:

2.2.1Free ash (4\

2.2.2Sulphur content in coal (4\

2.3Give TWO advantages when steam and xygen are used at high pressure during gasification. (4\

2.4Define the term fractionation (2\ [25]25

Q3— Section header —

3.1Name TWO methods of heat transfer. (2\

3.2Name FIVE factors on which heat transfer by conduction depends. (5\

3.3Give the name of product produced in the catalytic cracking of hydrocarbons (1\

3.4xplain the construction and operation of a shell and tube heat exchanger.

3.5Name EIGHT components of shell and tube heat exchangers. (8\

3.6Give an advantage of floating head heat exchanger. (2\

Q4— Section header —

4.1Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'False' next to the question number (4.1.1

4.1.5\in the ANSWER BOOK. Give a reason for each answer in (4.1.1

4.1.1In a single acting pump valves are placed at both ends of the cylinder. (2\

4.1.2Multicylinder have two cylinder and one piston. (2\

4.1.3The action of plunger pump and piston pump are the same in both cases. (2\

4.1.4aw states that pressure is inversely proportional to volume provided that the temperature remains constant. (2\

4.1.5states that when a container is filled with different gases the total pressure of the gases will be the sum of the pressures that would be exerted separately by each of the

4.2Calculate the volume delivered per hour by a pump of which the piston has a diameter of 250 mm and a stroke length of 200 mm ts double action runs at 350 revolution per minute

4.3xplain each of the following compressors that are classified according to the pressures under which it operates:

4.3.1Blowers (2\

4.3.2Boosters (2\

4.3.3Vacuum pump (2\ [20] (11040023\ Copyright reserved20

Q5— Section header —

5.1Make a labelled sketch of a pneumatic transmitter. (7\

5.2Give ONE description for each of the following statements by writing it next to the question number (5.2.1

5.2.3\n the ANSWER BOOK.

5.2.1ction performed by controller to control the variables of process (2\

5.2.2ction that considers the magnitude, speed and direction of the variations of measured variable (2\

5.2.3Transmitter consist ing of bellows, a flapper and a nozzle (2\ [13] TOTAL: 100 (11040023\ Copyright reserved13

Mark Allocation

Total100 marks

Sections20 + 25 + 22 + 20 + 13 = 100 marks

Paper information

TitleDocument

SubjectPlant Opertation Theory

LevelN3

Document typeQuestion paper

Year2022

MonthNovember

Pages7

Downloads3

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,439

About Plant Opertation Theory 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

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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

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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Pages7

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