Instrumentation Technology NCV Level 3 — Document
February 2018 — NCV Level 3 — Instrumentation Technology
NCV Level 3
2018
NCV Engineering
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Q1— Section header —
1.1The McLeod gauge is mainly used o measure very low absolute pressures and compressibility of gases.
1.1.1Make a neat labe led diagram of a McLeod gauge. (7\
1.1.2The McLeod gauge works according to Boyle s law. State Boyle s law. (3\
1.1.3Give TWO disadvantages of the McLeod gauge. (2\
1.2Resistance strain gauges can be used as a secondary element in pressure measurements . They are joined together with bellows and diaphragms to effectively measure pressure.
1.2.1Draw a diagram to show how low differenti al pressure can be measured. (6\
1.2.2Explain the operation of the instrument in QUESTION
1.2.1(5\ [23] (6060463\ NC1600 (E\23
Q2— Section header —
2.1There are many types of thermometer available on the market. Before you make your purc hase, it is vital that you are aware of the range of available products.
2.1.1(2\
2.1.2(5\ his is one of the more specialis ed and niche types of thermometer. It deal
2.1.3(2\
2.1.4(5\ (14\
2.2The image below shows examples of thermistors.
2.2.1efine the term thermistor
2.2.2Give TWO application of a thermistor
2.2.3Explain the working principle of a thermistor. (3 2\ (6\ (6060463\
2.4Expansion thermometers indicate temperature by means of the change in volume or pressure of th e liquid or gas inside it.
2.4.1Make a neat labe led drawing of a liquid filled expansion thermometer. (6\
2.4.2Give TWO types of liquid that can be used in the thermometer drawn in QUESTION
2.4.1(2\
2.4.3Explain the term calibrati on (2\
2.4.4Explain how to calibrate the instrument drawn in QUESTION
2.4.1(5\
2.5Explain what is happening in the image below. (2\ 37
Q3— Section header —
3.1Within couple of years, a number of compan ies that previously only had single variable vortex flowmeters
3.2The Coriolis flowmeter is the perfect flowmeter, George Mattingly Ph.D. of the National Institute of Standards and Technology (no w retired\
3.2.1Why is it important to zero check the meter? (3\
3.2.2Despite the statement above how would one zero check the instrument (Coriolis\ on site
3.2.3Make a neat labe led d rawing of a oriolis flowmeter. (6\
3.3The figure below represents an open flow channel.
3.3.1What is an open flow c hannel? (2\
3.3.2Give TWO examples of open flow channels? (2\
3.3.3Nam THREE methods used to measure open channel flows. (3\
3.3.4Give TWO disadvantages of an open flow channel meter. (2\
3.4Ultrasonic flow meters will generally not work with distilled water or drinking water.
3.4.1What is the popular indu stry application of the ultrasonic flowmeter (4\
3.4.2What does an ultrasonic flow meter require in its flow and what kind of liquid is it ideal for? (4\
3.4.3Make a drawing of volumetric meter for gas es and show the in and out directio
3.4.4Give FOUR methods for commissioning the ultrasonic flow meter. (4\
Q4— Section header —
4.1evel is defined as the filling height of a liquid or bulk material, for example in a tank or reservoir
4.1.1 Give THREE principles that level devices operate under. (3\
4.1.2Name TWO methods used to measure the level of liquids. (2\
4.2Explain how petrol would be measured from its tank to inform the owner how much is left. (5\
4.3An instru ment is suitable to determine the liquid level in a tank or container where the liquid serves as the dielectric.
4.3.1What is the name of the instrument mentioned above? (2\
4.3.2Make a neat labe led sketch to represent the instrument mention ed in QUESTION
4.3.1above (8\
4.3.3hat should be taken into consideration when installing this instrument (5\
4.3.4Explain the instrument's theory of operation. (6060463\
4.4Choose a term from COLUMN B that m atches a description in COLUMN A. Write only the letter (A K\next to the question number (4.4.1
4.4.10\in the ANSWER BOOK. COLUMN A COLUMN B
4.4.10ethod tha is the same as the method using manometers an be applied for both high
4.5A mercury U tube manometer is mounted 3 m below the zero level of an oil storage tank. Determine the level of the liquid if the manometer shows a reading of 80 cm. The density of the oil is 900
Multiple Choice Options
1D)C. =
Topics Identified
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Business EnvironmentsBusiness Plan
Mark Allocation
Total150 marks
Sections23 = 23 marks
Paper information
TitleDocument
SubjectInstrumentation Technology
LevelNCV Level 3
Document typeQuestion paper
Year2018
MonthFebruary
Pages10
Downloads2
Examination context
Decade2010s
Years ago8y
SeasonSummer (SH)
Start dayThursday
Exam periodFebruary 2018
Days since exam3,173
About Instrumentation Technology 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
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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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