Logic Systems N6 — Document

April 2018 — N6 — Logic Systems

N6 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 6 pages 📝 24 items found 📚 1 topics

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Q1— Section header —

1.1Draw a large neat , fully labelled block diagram to show how a programmable logic c ontroller (PLC\ is used to control two electric motors driving two

1.2Draw the circuit diagram of a 4 bit R/ 2R converter using an operational amplifier. Use 10 kilo

1.3Give TWO advanta ges and ONE disadvantage of an R/2R converter. (3\ [20] 808030620

Q2— Section header —

2.1Indicate whether the following statements are TRUE or FALSE Choose the answer and write only 'true' or 'false' next to the question number (2.1.1

2.1.5\ the ANSWER BOOK. Correct the statement if it is FALSE.

2.1.1The instruction register holds only the operand address of the current instruction.

2.1.2The program counter stores a count of all the programs stored in RAM.

2.1.3Microsoft has full propriet ary rights over Google's Android operating system.

2.1.4Microsoft's Office suite is well known as open source s oftware.

2.1.5

2.2The International Electro technical Commission lists and defines programming languages under Open International Standard IEC 61131 Draw up a numbered list of FIVE of these programming languages. Clearly

Q3— Section header —

3.1Most computers use a bus structure or system to link the various components within system. Name THREE types of busses and make a sketch clearly showing the connections and directions of these three busses in a simple computer

3.2Logic systems based on digital computers have superseded operational amplifiers in many technological fields Give FOUR reasons why this has happened. (4\

3.3Your manager has bee n asked to draw up a cost/benefit analysis regarding the replacing of an operational amplifier which controls the level of edible oil in a stainless steel tank The alternative method of control is

Q4— Section header —

4.1Show with a simple sketch what contact bounce will look like on an oscilloscope and explain why it is necessary for a microprocessor to implement a de bounce function while scanning the ASCII code input which

4.2Neatly draw a complete keyboard diode matrix circuit diagram so that striking ea ch of the keys from A to F (NOTE upper case letters \will produce the

4.3Draw a complete, fully labelled block diagram of a parallel ADC (flash converter\ ist the decoding table for this converter. (8\ [20]20

Q5— Section header —

5.1Programming instruction procedure The following instruction set is available: OP COD DESCRIPTION LOAD Load accumulator

5.220

Topics Identified

Business Plan

Mark Allocation

Total100 marks

Sections20 + 20 + 20 + 20 = 80 marks

Paper information

TitleDocument

SubjectLogic Systems

LevelN6

Document typeQuestion paper

Year2018

MonthApril

Pages6

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,114

About Logic Systems 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

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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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Pages6

Archived on8 September 2026

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