Industrial Instruments N6 — Document

April 2020 — N6 — Industrial Instruments

N6 2020 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 6 pages 📝 30 items found 📚 1 topics

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Q1— Section header —

1.1A (paramagnetic /diamagnetic gas is magnetised i n the direction of the applied field and tends to go to the stronges t part of the magnetising field.

1.2automatic cascade control loop, the set point of a secondary controller is determined b y the output of the primary controller

1.3The term (group/division\ specifies the probability of finding that particular material in the hazardous area

1.4The phenomenon ray spectral line/ ontinuous spectrum happens when an incident electron knocks orbital electrons out of an atom and an electron from an outer shell will fall to the inner orbit to fill the vacancy

1.5

Q2— Section header —

2.5\ in the ANSWER BOOK. pectrum; ray spectral line; ontinuous spectrum flashing; cavitation Class Class III;

2.1A mathematical relationship between the valve stroke and the effective port area

2.2A drop in pressure below the vapour pressure of the fluid when the flow passes across the seat of a valve

2.3The rainbow series of colours produced when visible (white\ light is split into its different components, that is, violet through indigo, blue, green, yellow, orange and red

2.4When an individual high speed electron is abruptly decelerated when passing through matter, the electron will lose energy emitting ray

2.5

4.2.2ame the components indicated in the diagram by writing only the answer next to the letter in the ANSWER BOOK (10\ [25]25

Q5— Section header —

5.1A control valve is required for water pressure control The characteristics of the valve are as follows: Cv = 75 Rangeability Turndown Upstream pressure

5.1.1The maximum flow that the valve can allow

5.1.2The minimum controlled flow

5.1.3

5.2Make a neat belled sketch of a cascade control. Clearly show all the elements of the controller (7\

5.3Describe the systematic experimental method of adjusting the control settings of a proportional plus derivative controller on the plant (6\

Q6— Section header —

6.1What is the purpose of the feed water control system in the boiler? (2\

6.2What precautions must be taken to ensure the correct operation of the pressure transmitter for a pressure control system in a vacuum distillation column? (4\

6.3State EIGHT variables that can be manipulated when controlling a distillation column (8\

6.4Make a neat labelled sketch of a distillation column consisting of the following components: eed pump pre heater, reboiler, condenser, reflux, accumulator reflux pump (9\

Q7— Section header —

7.1Give THREE important questions to be asked when evaluating a system for intrinsic safety (3\

7.2What is the purpose of a barrier circuit? (3\

7.3Name FOUR metho ds that can be used to prevent ectrical equipment from placing ignition capable currents a nd voltages into an explosive

Topics Identified

Business Plan

Mark Allocation

Total100 marks

Sections25 + 23 + 10 = 58 marks

Paper information

TitleDocument

SubjectIndustrial Instruments

LevelN6

Document typeQuestion paper

Year2020

MonthApril

Pages7

Downloads1

Examination context

Decade2020s

Years ago6y

SeasonAutumn (SH)

Start dayWednesday

Exam periodApril 2020

Days since exam2,385

About Industrial Instruments examination preparation

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A practical revision approach

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File size280.9 KB

Pages7

Archived on8 September 2026

File age47d

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