Instrument Trade Theory N2 — Document

December 2023 — N2 — Instrument Trade Theory

N2 2023 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 32 items found

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Q1— Section header —

1.1Choose a term from COLUMN B that matches a description in COLUMN A. Write only the letter (A L\next to the question number (1.1.1

1.1.10\in the ANSWER BOOK. COLUMN A COLUMN B

1.1.10Force per unit area he difference between the pressures of the fluid Specific gravity is 1000kg.m It is the

1.2Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'False' next to the question number ( .2.1 .2.5\in the ANSWER BOOK.

1.2.1The helical bourdon tube type is used for high pressures only.

1.2.2The disadvantage of the equal leg manometer is that it can only be used for small differential pressures.

1.2.3The pressure exerted by a column of liquid depends on its density, height, pressure and gravitational force. 11040452 Copyright reserved

1.2.4

1.2

1.3Make a neat, labelled sketch of an inclined tube manometer. (5\

1.4An inclined tube manometer uses ercury as sealing liquid. Calculate the applied differential pressure if the following are known Angle of tube with the horizontal = 45 Area of cistern =

0.05Area of tube = 0.0009 Scale reading = 29 cm (5\

Q2— Section header —

2.1Make a neat sketch of mercury filled liquid expansion thermometer (6\

2.2State FOUR advantages of using resistance thermometers (4\

2.3Name FOUR filling materials used for expansion thermometers (4\

2.4Draw a neat, labelled sketch of a self balancing Wheatstone bridge resistance thermometer. (7\

2.5State the law of intermediate metals. (4\ [25]25

Q3— Section header —

3.1The Dall tube is a short version of a Venturi tube with a very narrow throat area

3.1.1Make a labelled sketch of the Dall tube differential pressure instrument. (6\

3.1.2Briefly explain the basic operation of a differential pressure

Q3— Section header —

3.2Name any THREE displacement type flow meters. (3\

3.3Draw a neat labelled sketch of a shaped chamber flow meter. (5\

3.4Define Vena contracta. (3\

3.5State THREE advantages of magnetic flow meter. (3\ [25] 1104045225

Q4— Section header —

4.1Draw a diagram of the conduction method of level measurement and explain its operation. (10\

4.2Make a neat, labelled sketch of a torque tube displacer detector (5\

4.3Make a neat labelled sketch of a ultrasonic level detector and briefly explain its working principle. (10\ [25] TOTAL: 10025

Multiple Choice Options

D)C.

D)C. =

Mark Allocation

Total100 marks

Sections25 + 25 + 25 + 25 = 100 marks

Paper information

TitleDocument

SubjectInstrument Trade Theory

LevelN2

Document typeQuestion paper

Year2023

MonthDecember

Pages6

Downloads5

Examination context

Decade2020s

Years ago3y

SeasonSummer (SH)

Start dayFriday

Exam periodDecember 2023

Days since exam1,044

About Instrument Trade 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.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

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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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