Electronic Control And Digital Electronics NCV Level 2 — Document P1

November 2022 — NCV Level 2 — Electronic Control And Digital Electronics

NCV Level 2 2022 NCV Engineering

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Q1— Section header —

1.1Indicate whether the following statements are TRUE or FALSE. Cho ose the answer and write only 'True' or 'F alse' next to the question number (1.1.1

1.1.5\n the ANSWER BOOK.

1.1.1n a tomic number is the number of electrons in nucleus.

1.1.2Conductor are elements with more than four electrons.

1.1.3Ionisation involves the losing and gaining of electrons.

1.1.4A c ovalent bond is the sharing of electrons between atoms to complete the valence shell.

1.1.5

1.2Draw a labelled sketch of silicon atom with 14 electrons. (4\

1.3Name and explain TWO types of bonding processes. (4\

1.4What is the colour coding of 470 (2\

1.5Explain TWO limitations in the operating conditions of PN junctions (4\

1.6Define a BJT (1\ [20]20

Q2— Section header —

2.1List FOUR disadvantages of integrated circuits. (4\

2.2Name THREE applications of op amp. (3\

2.3Sketch the following electronic symbols.

2.3.1Electrolytic capacitor

2.3.2ode

2.3.3Step down transformer

2.3.4Resistor

2.3.5

2.4Describe how you would test a transistor with a digital multimeter. (4\ (12041022\ Copyright reserved

2.5With the aid of the diagram explain how you would connect the following instruments in a circuit

2.2.1Ammeter

2.2.2Voltmeter

2.2

2.6Calculate the inductance of two inductors = 30 mH and L = 50 mH connected in series.

Q3— Section header —

3.1State FOUR advantages of digital system compared to an analogue system (4\

3.2Define a positive logic (2\

3.3Convert 11101 to binary number (3\

3.4Convert 568 10 to binary number. (3\

3.5Calculate the value of the following binary numbers

3.5.11111 + 110

3.5.2

3.6from 1001 (5\

3.7Define odd parity bit (2\

3.8Draw a fully labelled switching circuit of OR gates. (4\

3.9Draw a circuit diagram of an RS flip flop using NAND gates. (5\

3.10Sketch the IEC symbol for a type flip flop

Q4— Section header —

4.1Define hardware (1\

4.2Explain the use of the following computer ports

4.2.1Serial port

4.2.2

4.3Briefly describe how a igital versatile disk (DVD\ is used to store information. (7\ [10]10

Q5— Section header —

5.1Name THREE types of probes used in liquid levels (3\

5.2List TWO types of thermistors (2\

5.310

Mark Allocation

Total100 marks

Sections20 + 25 + 35 + 10 + 10 = 100 marks

Paper information

TitleDocument

SubjectElectronic Control And Digital Electronics

LevelNCV Level 2

Document typeQuestion paper

Year2022

MonthNovember

Pages5

Downloads5

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,441

About Electronic Control And Digital Electronics 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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