Plant Operation Theory N3 — Memo

August 2021 — N3 — Plant Operation Theory

N3 2021 Nated Engineering

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Q1— Section header —

1.1.1The solvents in which the monomers dissolve and grow to polymers are usually chemically inactive. It diffuses the monomers and retards the polymerisation reaction. The strength of the solution controls the speed of the reaction and

1.3Nickel Ruthenium Palladium Iridium Platinum (5\ [20]20

Q2— Section header —

2.112 + 32 = 44 g/mol g mass of carbon require 32g mass of O Kg of C = Amount of air required Air contains 26% of Oxygen by mass Air required =

Q3— Section header —

3.1Chemical reactions Friction or mechanical energy Electrical energy Aluminium Copper Silver Water

3.5Efficiency of heat exchanger is an indication of the degree of effective operation of the app aratus and is closely related to the coeffecient of exchange of heart (also known as the factor of heart exchange\.

Q4— Section header —

4.1Piston pumps Plunger pumps and is immersed in the liquid or suction is supplied under positive liquid head Care must be taken to ensure that the delivery valve is always open while in use.

4.3P: Pressure of the gas V: Volume of the gas M: Mass of the gas R: Characteristics constant of that gas . corresponding to the specific heat capacity of the gas Their efficiency is higher the workdone for energy input is

Q5— Section header —

5.1Air inlet connector Valve house OR valve body Diaphragm Springs Lever Valve stem Position indicator

Mark Allocation

Sections20 + 25 + 25 + 18 + 12 = 100 marks

Paper information

TitleMemo

SubjectPlant Operation Theory

LevelN3

Document typeNated Engineering

Year2021

MonthAugust

Pages6

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonWinter (SH)

Start daySunday

Exam periodAugust 2021

Days since exam1,896

About Plant Operation 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

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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File size272.9 KB

Pages6

Archived on8 September 2026

File age45d

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