Mechanical Technology Memo 1 (English)

Feb-March 2013 — Grade 12 / Matric — Mechanical Technology

Memo 2013 Grade 12 English

↓ Download PDF 📄 247.6 KB View Exam Paper

Preparing document

📋 Document Analysis

🎯 200 marks 📄 17 pages 📝 87 items found ∑ 1 math symbols 📚 2 topics

See full analysis

Questions — A Preview of What to Expect in the Document

This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.

Q1— Section header —

1.1(1\

1.2(1\

1.3(1\

1.4(1\

1.5(1\

1.6(1\

1.7(1\

1.8(1\

1.9(1\

1.10(1\

1.11(1\

1.12(1\

1.13(1\

1.14(1\

1.15(1\

1.16(1\

1.17(1\

1.18(1\

1.19(1\

1.20(1\ [20]20

Q2— Section header —

2.1Gas Analyzer (Carbon Mono xide\ and hydrocarbon (2\

2.2Hardness is the resistance against scratching, denting and wear. (2\

2.3Hardness testers: Brinell hardness tester Rockwell hardness tester Vickers Any 2 x 1 = 2\ (2\ Compression tester: Check for worn cylinders Check for worn

2.5Cylinder leakage teste Listen at the carburettor for a hissing noise. Inlet valve is leaking. Listen at the exhaust pipe for a hissing noise. Exhaust valve is leaking. Listen for a hissing noise in the dipstick hole.

2.6Tensile Tester A tensile test measures the resistance of a material to a static or slowly applied tensile axial force. (2\

2.7Beam bending test Beam bending test is to investigate the deflection of beams. To see if the beam is safe enough to support the oad (2\

2.8MIGS abbreviation Metal Inert Gas Shielded (1\ [20]20

3.3Tin and lead bases in white metal The tin base white metal is used in heavy duty bearings to withstand greater pressures and speed Lead based metals are used under less demanding conditions (2\

3.4Use of flux Flux is used to ensure that the solder flows over a chemically cle an surface (1\

3.5Advantages of silver solder It has a higher melting point and variety of applications It is resistant to corrosion

3.6Purpose of using certain materials

3.6P.V.C. is not a good conductor of electricity an d corrosion resistant t can be obtained in a range of colours and sizes (2\

3.6Copper wire is used because it is a good conductor of electricity and will resist corrosion It is also very soft and malleable (2\

3.8Nylon Properties of Nylon Needs no lubrication Can withstand shock Low maintenance Light in weight Easy to machine Any

Q4— Section header —

4.2Multi met er: Keep the meter dry Keep the meter away from dust and dirt Use and store the meter in normal temperature environment Do not drop the meter Use only charged cells of the correct size. Any

4.3athe

4.3.1Chuck: Keep hands from rotating chuck Don t leave the chuck key in the chuck Make sure the chuck is well secured before switching on the machine Place some protection on the bed while changing chucks Turn the chuck

4.3.2Machine guard: Make sure the guard is well secured before switching on e machine Machine guard must be in a good condition Any

4.3.3Tail stock: Make sure the centre or drill chuck is well secured before switching on the machine Make sure the tail stock is well secured and locked when cutting between centres Any

4.4dexing:

4.4.1Gear cutter or involute cutter

4.4.3Indexing circle Hole Holes Indexing

4.4.4Change gears (any of the other formulae are acceptable\ Direction of rotation Direction of feed

4.5Advantages of helical cutters Chattering is reduced Helps to remove shavings Continuous forming of shaving is prevented Better cutting action Finishing on the work piece is improved Coolant flow is easier

4.6Feed in mm/min: mm/min Feed Feed

4.7.1Dedendum 3,125 1,157 Dedendum Dedendum 1,157 Dedendum Dedendum

4.7.2Gear ratio ratio Gear ratio Gear gears driving the teeth

4.7.3PCD 62,5mm PCD

4.7.4Outside diameter 67,5mm PCD Diameter Outside (2\

4.7.5Circular pitch Circular

4.8Advantages of MIG/MAG Suitable for t hin metals Can weld continuou sly Minimal post weld cleaning is required Can weld in any position Any 3x1

4.9WELDING FLAW ONE CAUSE NON DESTRUCTIVE TEST Cracks Rapid cooling Base metal not w

Q5— Section header —

5.1Pour point is the lowest temperature at which a liq uid remains fluid or pourable (2\

5.2Cutting fluids: Avoid contamination of the cutting fluid by drainin g and regularly rep lacing it Always clean the machine s splash tray of metal cutting after use Regularly wipe clean fluid splashes of the machine parts

5.3utting fluids: Acts as a lubricant Improve surface finish To keep the work piece cool To keep the cutting tool cool To obtain a higher cutting speed It gives the cutting tool a longer lifespan

5.4Changing engine oil: Formation of gum, acids and lacquer may be left by the combustion of the fuel Oil loses its viscosity due to e xcessive heat Metal particles deposit in the oil due to metal metal contact

5.5Fitting oil filter: Use a filter strap spanner and remove old oil filter Clean the filter area and lightly oil the mating surfaces Put a smear of clean engine oil on the seal of the filter Screw the filter

5.6Causes of bearing overheating: Poor lubrication Friction is increased due to dirty oi Incorrect grade of oil Misalignment of bearing and shaft causing undue strain Shaft is out off round (oval Bearing not torque

5.7Steam turbines are operated by using steam that creates kinetic energy to generate rotational motion that is mechanical energy (2\

5.8Classes of turbine Impulse turbine Reaction turbine (2\

5.9Turbocharger: The hot exhaust gases are routed to the turbine wheel to enable the wheel to spin at very high speeds The gases are then channelled out the housing and wheel assembly

5.1Advantages of gas turbines: High power outpu t from the given weight of engine The torque output characteristic permits a simplifica tion of the transmission system Smooth vibration less running due to absence of reciprocating

5.11Boost refers to the increase in manifold pressure that is generated by the turbocharger in the intake path that exceeds the normal atmospheric pressure (2\

5.12Advantages of a supercharger: More power is obtained compared to a simil ar vehicle without supercharger Supercharged engines are more economical per given kilowatt output Less fuel is used compared to engine mass

5.1Disadvantages of a supercharger: A small amount of power is lost in order to drive the supercharger because it us es the engine power to drive it Higher fuel consumption results if the power generated is not fully

Q6— Section header —

6.1Stress and Strain:

6.1.1Tensile stress (2\

6.1.2Stre ss: MPa 309405,94 (3\

6.1.3Strain: 0,00012694 0,391 (3\

6.1.4Elasticity modulus: GPa 2437265184 (3\ 14

6.2Gear drives:

6.2.1Number of teeth on driven gear: teeth 1000 (4\

6.2.2Rotation frequency of the driven gear: rpm rpm 1000 (4\

6.2.3Clockwise (2\ 15

6.3Belt drives:

6.3.1Diameter driven pulley (4\

6.3.2Power transmitted: Watt 442, 120\ (6\ 16

6.4Hydraulics:

6.4.1Pressure: 835072,23 0,00101787 (5\

6.4.2Number of strokes strokes length stroke One strokes Number 1,322656 33,86

6.5Effective diameter:

0.19642857 0,098 diameter 0,09821428 0,098 (5\ [50] TOTAL50

Mathematical Content

f(x)

Topics Identified

CircuitsMaterials

Mark Allocation

Total200 marks

Sections20 + 20 + 20 + 50 + 40 + 50 = 200 marks

Paper information

SubjectMechanical Technology

Year2013

SessionFeb-March

TypeMemo

PaperPaper 1

LanguageEnglish

Pages17

Downloads4

Examination context

Decade2010s

Years ago13y

Season—

Start day—

Exam period—

Days since exam—

About Mechanical Technology examination preparation

This Grade 12 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 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.

Grade 12 subject hubs

Each matric subject has its own dedicated hub on Freemode with every past paper and marking memorandum we have archived for that subject.

➗ Mathematics View papers → 📊 Mathematical Literacy View papers → ⚗️ Physical Sciences View papers → 🧬 Life Sciences View papers → 📒 Accounting View papers → 💼 Business Studies View papers → 📈 Economics View papers → 🌍 Geography View papers → 🏛️ History View papers → 📖 English View papers → 🇿🇦 Afrikaans View papers → 🗣️ IsiNdebele View papers → 🗣️ IsiXhosa View papers → 🗣️ IsiZulu View papers → 🗣️ Sepedi View papers → 🗣️ Sesotho View papers → 🗣️ Setswana View papers → 🌾 Agricultural Sciences View papers →

Corresponding examination paper

Examination paper available

Open the corresponding examination paper to practise the questions before reviewing the marking memorandum on this page. Attempt every question under timed conditions for the most realistic preparation.

Mechanical Technology Paper 1 (English) →

File details

File size247.6 KB

Pages17

Archived on8 September 2026

File age48d

ContributorFreeMode

FingerprintEA0B1F9C10AB

Questions and learner discussion

No questions or discussions have been posted yet.