Industrial Instruments N6 — Memo

April 2021 — N6 — Industrial Instruments

N6 2021 Nated Engineering

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Q1— Section header —

1.1reset

1.2proportional

1.3Division

1.4joule

1.55

Q2— Section header —

2.1quick opening characteristic

2.2control valve

2.3low airflow interlock

2.4cascade control loop

2.55

Q3— Section header —

3.1False Screwed connections are used for small size valves and flanges for large size valves

3.2False For c rystalline materials the lines are sharply defined (2\

3.3True (1\

3.4True (1\

3.5False An increase air pressure on the diap hragm causes the valve to open, which result in ncrease in flow through the valve (2\

3.6False Override control occurs when two or more control loops are connected to a common valve in such a way that under normal conditions, the normal control loop is in command of the valve (2\ [10]10

Q4— Section header —

4.1INLETOUTLETRESISTANCETHERMOMETERST1T2HEAT ARBORBING AIRR1R2G Metered quantities of gas and air are introduced to a burner and the tank is heated When air is introduced to the air chamber, it absorbs the heat from the tank.

4.2Arc excitation It is usually used for analyses where a minute amount of the element is present Spark excitation The spark discharge is the most reproducible of the sources but it

4.3(5\ [23]23

Q5— Section header —

5.1(5\

5.2.1Measurement lag is t he time taken for a detecting element to reach equilibrium with the process so that the detecting element accurately represents the process. This rate respon depends on the capacity of

5.4.525

Q6— Section header —

6.1.1Distillation

6.1.2olatile constituents

6.1.3apour

6.1.4ondensation

6.1.5urnace

6.1.7

6.2This is due to the fact that in a series system, a time lag in measurement If this occur, alternating periods of deficient and excess combustion air is realised. The level is measured and transmitted to

Q7— Section header —

7.1Possib ity for combustible material to form combustible mixture with air Presence of a source of ignition with sufficient energy When the source come in contact with explosive gas Quantity of combustible material large en

Topics Identified

Business Plan

Mark Allocation

Sections5 + 5 + 10 + 23 + 25 + 20 + 12 = 100 marks

Paper information

TitleMemo

SubjectIndustrial Instruments

LevelN6

Document typeNated Engineering

Year2021

MonthApril

Pages6

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonAutumn (SH)

Start dayThursday

Exam periodApril 2021

Days since exam2,019

About Industrial Instruments 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 size391.4 KB

Pages6

Archived on8 September 2026

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