Renewable Energy Technologies NCV Level 3 — Memo

February 2020 — NCV Level 3 — Renewable Energy Technologies

NCV Level 3 2020 NCV Engineering

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Q1— Section header —

1.1Replacing inefficient traffic and street lights with energy efficient technologies Lifespan of system System efficiency Subsidies Isolating valves must be fitted bef ore and after the storage tank. A vent must be connected to the highest point of the water heat

1.5.3

1.6.1Total extra cost: R32 500 000 = R23, = 26 86 months = 2 years (2\ [20]20

Q2— Section header —

2.1Glazing Header Absorber late Insulation Shading that falls over the collector early morning or late afternoon will have limited effects, and brief partial shading over the collector surface can in many cases be ignored. If possible

2.3.1Rack mounting

2.3.2Reflectance

2.3.3Direct mounting

2.3.4Hanger

2.3.5Emmitance

2.3.6Integral mounting

2.3.7Standoff mounting

2.3.8

2.4.1True

2.4.2True

2.4.3True

2.4.4True

2.4.5True

2.4.6False

2.4.7

2.5ituation in which radiation is converted into sen sible heat within the material. (2\

2.6

Q3— Section header —

3.1Some solar water heating systems use heat transfer fluids (HTF\ such as polypropylene glycol, whi ch is usually mixed with water. Albeit polyprop ylene glycol is not considered to be poisonous one should

3.3Scaffolding, constructed work platforms or mobile elevating work platforms are the preferred means of temporary access. Where this is not practicable, use portable industrial grade ladders with a load rating o

3.4It can be used where work is be carried out near an unprotected edge. Only when total restraint is impractical should a fal l arrest system be considered. Fall arrest is a minimisation measure as it does not

Q4— Section header —

4.1

4.2This insulates the inside of the tube from its environment, thus minimising heat loss. Two flat sheets of glass are usually not strong enough to withstand the vacuum. And this is instead created between two concentric tubes.

4.3The stagnation temperature of the manifold can reach 295 The water in the collector will be converted to steam and the system will be under severe pressure. The air releas e valve is a safety mechanism which rel

4.4Drain cock

4.6With direct systems you cannot simply rely on the collector and pipe work insulation to keep the components from freezing. The main purpose of the insulation is to reduce heat loss and increase performance.

4.7Ladder Tape measure Pitch gauge Compass Camera/Cell phone There is no pressure in the tank and water flows to the house by means of gravity feed.

Topics Identified

Business Plan

Mark Allocation

Sections20 + 30 + 15 + 35 = 100 marks

Paper information

TitleMemo

SubjectRenewable Energy Technologies

LevelNCV Level 3

Document typeNCV Engineering

Year2020

MonthFebruary

Pages7

Downloads3

Examination context

Decade2020s

Years ago6y

SeasonSummer (SH)

Start daySaturday

Exam periodFebruary 2020

Days since exam2,446

About Renewable Energy Technologies 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 size259.9 KB

Pages7

Archived on8 September 2026

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