Agricultural Technology Memo 1 (English)

November 2015 — Grade 12 / Matric — Agricultural Technology

Memo 2015 Grade 12 English

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🎯 200 marks 📄 17 pages 📝 94 items found 📚 3 topics

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Q1— Section header —

1.1.1(2\

1.1.2(2\

1.1.3(2\

1.1.4(2\

1.1.5A, (2\

1.1.6(2\

1.1.7(2\

1.1.8(2\

1.1.9(2\

1.1.10(2\ (10x2\ (20\

1.2.1Nickel (2\

1.2.2Anaerobic acteria (2\

1.2.3Levelling (2\

1.2.4Global Positioning System GPS (2\

1.2.5Generator (2\ (5x2\ (10\

1.3.3.1 (2\

1.3.2(2\

1.3.3(2\

1.3.4(2\

1.3.5(2\ (5x2\ (10\ TOTAL SECTION A:

Q2— Section header —

2.1.1aterial add ed to opper inc (2\

2.1.2TWO methods to permanently join copper products. oft soldering Brazing Silver soldering (Any 2\

2.1.3A substance that can dissolve tin. Acids Base (Any 1\

2.2.1TWO most important spects when choosing an adhesive Type of material to be joined. Conditions under which this joint will be used. (2\

2.2.2Preparation of diesel tank for adhesive. Clean the surface area around the crack with a cloth and sand it lightly until there are no more signs of dirt, rust or diesel fuel before applying the adhesive.

2.3.1Delamination ability (Vesconite\ Delamination cannot occur because liquid cannot penetrate the bearing layers that can cause

2.3.2Friction ability Vescon te has a low static and dynamic friction which remains in tough working environments; whether dry or wet, lightly or heavily loaded (2\

2.3.3orr ing ability Vesconite is not subject to rust, acid and electrolytic corrosion

2.4.1TWO methods prevent ing lightning damage to the electric fence energizer. Instal lightning protectors /arrestor

2.4.2he procedure when testing the earth ing system of an electrical fence. Firstly short out the live fence line to ground, either with a metal stake or by laying the fence line on the ground for about 100 meters and at

2.4.3Description of the earth return system of an electric fence and TWO probable cause of a voltage drop in the electric fence loop As with all energizers there must be a return path through the ground arth

2.5.1he correct type of fence wire for an electric fence Steel wire (1\

2.5.2he pres cribed minimum thickness of the wire used for an electric fence

1.5(1\

2.5.3WO methods to protect the bare electric wires of an electric fence from corrosion. Tinning Galvanizing Electroplating

2.6FOUR safety quirements for insulating material used on the ceiling Must not be harmful or dangerous to people when inhaled or touched. Should not burn easily. Rodents and insects must not be able to eat it or build their nests in it.

2.7our components in logical sequence of use A\ Solar panel B\ Solar regulator C\attery D\nverter DC (4\

Q3— Section header —

3.1Description of the function of the wind turbine parts

3.1.1Propeller blades The blades are shaped like aero plane wings to catch the wind and turn large rotor. (1\

3.1.2Main shaft The main shaft is connected to the rotor and transfers the turning motion from the rotor to the generato (1\

3.1.3Gearbox To regulate the speed of the generator. Decrease or increase speed (1\

3.1.4Generator The generator converts mechanical energy into direct current electrica energy (1\

3.2.1TWO types of energy that sun rays consist of and a method that can be used to harness each Light energy hoto voltaic cells

3.2.2factors that determine the efficiency of a solar electric cell. he cell is defective When the electrons release heat, the panel also becomes warm, interfering with other aspects of the solar cells.

3.2.3evice used to change the direct current f the solar cell in to useful

3.3TWO problems with geo thermal energy. ump ing too much cold water into the geothermal energy source, as this will

3.4THREE disadvantages of fuel Low energy output of the fuels. he production cost of the fuel is currently very high. ertain food crops like maize are needed to make them which may le ad to an imbalance

3.5Description of ethanol methanol. Ethanol Is made by fermenting and then dis tilling starch and sugar crops: maize, sorghum, potatoes, wheat, sugar

Q4— Section header —

4.2.1he type of metal that the cu tting nozzle is manufactured from Copper (1\

4.2.2FOUR hints to ensure uality welding joints when oxy acetylene welding i s done in the OVERHEAD welding position A reduced melting pool is required, big enough to create the wanted penetration.

4.3elding defect that is caused during MIG welding .1 Porosity .2 Lack of penetration .3 Spatter .4 Undercut ting

4.5WO gasses that can be used MIG shielding gas. Argo Helium Carbon dioxide Argon and CO mixture (Any 2\

4.6.1material list for the gate. Square tubing 19 mm x 00 mm Round bar rods of 12 mm x 000 mm 2 x Hinges

4.6.2Total cost of the material for the safety gate. Square tubing: 00 mm x R 25 00=R 1 Round bar: 16

80.00Hinges: 2 x R .00

20.00Total cost: (Calculations must correlate if the learners design differs from given measure ments (5\

4.6.3eat sketch of the safety gate with the parts Marks will be allocated for the following Hinges Lock Measurements Nea tness (4\ Sketch of the safety gate.

4.7Gas to be used.

4.7.1Air/Oxygen

4.7.2Argon or Hydrogen ny 1\

4.7.3Nitrogen (1\ (1\ [35] 1135

Q5— Section header —

5.1.1echanism indicated by the arrow Slip clutch (1\

5.1.2TWO reasons for installing th mechan ism indicated by the arrow in the driveline of the cutti ng machine. Prevent machine from further damage when blade mechanisms are

5.1.3TWO procedu res that must be followed when the cutting machine is stored for a long period. Remove all

5.2.1forming mechanism of each baler. Baler A Vermeer has belts/chain Baling chamber enlarg es with the forming of the bale. aler B Welger

5.2.2TWO safety precautions when baling is done against a slope or hillside Bales on a slope have the potential to roll down the hill, break through fen ces and cross highways Always orient the bale correctly before ejecting the bale from the bale

5.3he role of advanced technological devices like computers and satellite Enable the tractor to drive by itself in a straight line with the aid of satellite navigation. Computers help you to identify problems in the mechanics of the

5.4.1Sources for reliable information on tractor oil. Consult the orkshop /operation manual. Internet. ractor

5.4.2THREE advantages of the use of automatic transmission oil Not compressible Good lubrication qualities Remains liquid over a large temperature range Not volatile Relatively cheap Easily conductible in pipes

5.5arts and Top link Levelling box (2\ he working of part The driv er of the tractor manoeuvres

5.6

5.8TWO main functions of a rear tractor differential Changing direction of rotation. Speed reduction. Divid rotation

5.1arm workshop equipment A, B an d C. Air wrench or impact wrench. Bottle jack or hydraulic jack. Hydraulic press. (3\

5.1THREE advantages of the standardization of farm implements and tractor spares. Any implement can be used on any make an d model tractor. The same engine and spares can be used on a variety of tractors.

5.1ault with a diesel tractor if black smok e is detected at the exhaust outlet. Diesel mixture too rich. Faulty diesel pump (1\ [40]40

Q6— Section header —

6.1he name of the irrigation method and provide ONE advantage of that type of irrigation system "Hand Move" portable sprinkler system Not expensive. Light easy movable Small

6.2The basic steps in selecting a suitable p ump. Decide on the type of pump that best fits your needs, rotary, centrifugal, submersible, turbine, jet pump, etc. Estimate the

6.3TWO reasons why a farmer need to determine the water flow rate of a pipe delivery system. For correct calibrati n of the sprayers. Effective scheduling of irrigation. To prevent the over ut ilization of the water source.

6.4TWO preventative measures a farmer must keep in mind to prevent theft when installing electrical irrigation cables Install the electrical

6.5Computer software effectively regulates an irrigation system to ensure a better harvest. It controls the amount of water supply.

6.6TWO devices to determine water evaporation in a field of maize. Tensio meter Evaporation pan Neutron probe (Any 2\ (2\

6.7.1Unblocking irrigation sprayers without dismantling the whole system. The tap at the end of the irrigation system is opened and all impurities in the pipe are flushed out. Unscrew the nozzle to remove blockages

6.7.2Describe the internal construction of the sprinkler head of an irrigation sprayer and explain the reason for the design. The top o f the sprinkler head is a circular shape with a series of fins or thin

6.8he drainage method that can be used in each of the following situations.

6.8.1Septic tank / municipal system (1\

6.8.2Fre nch drain (1\

6.8.3Drainage ditch Channel drain Storm water drain (Any 1\ (1\

6.9Functioning of a septic tank. Solids are broken down by anaerobic bacteria in the first tank. Very little solids remain when the watery sewerage flows to the second tank. Only liquid sewage remains and drains away through the outlet pipe or

Topics Identified

Plant ProductionAgricultural ManagementSoil Science

Mark Allocation

Total200 marks

Sections35 + 20 + 35 + 40 + 30 = 160 marks

Paper information

SubjectAgricultural Technology

Year2015

SessionNovember

TypeMemo

PaperPaper 1

LanguageEnglish

Pages17

Downloads3

Examination context

Decade2010s

Years ago11y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2015

Days since exam4,005

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