Nqf Electrotechnology NCV Level 4 — Memo

November 2022 — NCV Level 4 — Nqf Electrotechnology

NCV Level 4 2022 NCV Engineering

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Q1— Section header —

1.1.1The current (I\ drawn by the motor when full load torque and power has been reached

1.1.2The frequency (f\ at which the motor has been designed to operate

1.1.3Efficiency is the ratio between the output power and that of the input power expressed as a percentage

1.1.4Motor speed under full load conditions

1.1.5

1.2(3\

1.4Supply frequency control Rotor resistance control [20]20

Q2— Section header —

2.1(8\

2.2.1The m echanical limit switch is used to determine position with physical contact

2.2.2PLC is used to monitor and control an automated application

2.2.3Power supply is used to convert high voltage AC to DC v ltage at either a higher or lower voltage.

2.2.4

2.3.1The coil K1 is energi ed over the closed contact OL of the overload relay contactor. The motor will run as long as the indent top/ tart switch is closed (3\

2.3.2[20]20

Q3— Section header —

3.1.1Align the pulleys so that the belt will run true. Tighten the belt just enough to prev ent slippage any tighter will cause premature bearing failure. If possible, the lower side of the belt should be the

Q4— Section header —

4.1Structured ext Sequential unction hart

4.2(10\

4.3(7\ [20]20

Q5— Section header —

5.1.1True

5.1.2True

5.1.3False

5.1.4False

5.1.5

5.2(3\

5.3Check for bearing wear These dust particles have an adverse effect on machinery and equipment which can lead to machine failure over time if the ingress of pollution is not controlled. If the loads are above a

5.4.3Machinery that incorporates electric motors is subject to wear and tear owever it should have a life span of up to ten years or more if the manufacturers maintenance procedures are followed Wear and tear occurs due to the load that is placed on the electric motor

Mark Allocation

Sections20 + 20 + 20 + 20 + 20 = 100 marks

Paper information

TitleMemo

SubjectNqf Electrotechnology

LevelNCV Level 4

Document typeNCV Engineering

Year2022

MonthNovember

Pages7

Downloads4

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start dayTuesday

Exam periodNovember 2022

Days since exam1,441

About Nqf Electrotechnology 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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File size350 KB

Pages7

Archived on8 September 2026

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