Control Systems N6 — Memo

April 2020 — N6 — Control Systems

N6 2020 Nated Engineering

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Q1— Section header —

1.1True

1.2False

1.3False

1.4True

1.5False

1.6False

1.7True

1.8False

1.9False

1.1010

Q2— Section header —

2.1(6\ G2 +G4

2.2+4\( +5\ (2\

2.3(2\ [10]10

Q3— Section header —

3.1Gain crossover frequency : 1.75 rad/s 4 rad/s (2\

3.6Gain cut off rates: 39 dB/decade or 13dB/ octave 32 dB/decade or 11dB/ octave [10]10

Q4— Section header —

4.1See attached diagram

Q4— Section header —

Q5— Section header —

5.1Poles = 0.743 (2\

5.3

5.4

5.5

5.6The system does not become unstable due to the loci not crossing the imaginary axis. (1\ [10]10

Q6— Section header —

6.150000 50000 50000 edium [10]10

Q7— Section header —

7.1Computing systems ari ation in speeds can be achieved igh power factor [10]10

Q8— Section header —

8.1Reversible half wave universal speed control circuit (6\

8.2

8.3Speed of response [10]10

Q9— Section header —

9.1The pistons at the inlet port move outwards in the cylinder creating a vacuum which causes the fluid to be sucked into the cylinder cavity. The pistons at the outlet port move inwards causing a decrease in volume and an increase in pressure which forces

Q10— Section header —

10.1.1Proportional control

10.1.2Integral control (2 (2\

10.2ncrease in the gain of a system and causes the response to oscillate (1\

10.3If the flapper moves towards the nozzle, the nozzle back pressure increases and exerts a force inside the bellows causing it to expand which in turn moves the flapper away from the nozzle against the deviation.

Q4— Section header —

Topics Identified

Business Functions

Mark Allocation

Sections10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100 marks

Paper information

TitleMemo

SubjectControl Systems

LevelN6

Document typeNated Engineering

Year2020

MonthApril

Pages9

Downloads3

Examination context

Decade2020s

Years ago6y

SeasonAutumn (SH)

Start dayWednesday

Exam periodApril 2020

Days since exam2,383

About Control 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

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.

File details

File size385.8 KB

Pages9

Archived on8 September 2026

File age46d

ContributorFreeMode

Fingerprint6C3BC869C94C

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